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#41
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Adding UPS to light circuit
On Wed, 12 Feb 2014 10:32:43 -0500, "Sherlock.Homes"
wrote: "JIMMIE" wrote in message ... My house lighting is all LED total wattage with all on is less than 100 watts. What I want to do is to be able to connect my light circuits to the UPS during emergencies like this ice storm that is coming up. Not worried about heat or the fridge, I have gas heater backup and not enough in the fridge to worry about. Are there approved ways of connecting in the UPS that does not involve adding a transfer switch. _________________________________________________ _________________________ Nope - no approved ways I know of. Lots of jury-rigged possibilities though. The only way to evade the NEC on this is to use low voltage power. Install 12VDC LED lights throughout the house on a dedicated circuit that's always powered by a large (costly) deep discharge battery on a constant charging circuit. If you use a car battery you'll severely shorten its life if you deeply discharge it more than a few times. If these are 110VAC fixtures then there's very little hope of doing what you want to do and having it approved by an inspector. But it is an interesting idea and probably will be the way things are done 50 years from now. SH Not true. There are UPS units designed for exactly this application that are hardwired into the house circuitry. |
#42
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Adding UPS to light circuit
philo wrote:
On 02/12/2014 06:03 PM, DerbyDad03 wrote: Stormin Mormon wrote: On 2/12/2014 8:03 AM, philo wrote: That's weird, my UPS system will power my laptop for about a year or so. https://scontent-a-iad.xx.fbcdn.net/...86645054_n.jpg http://www.columbia.edu/cu/computinghistory/tubes.jpg They keep trying to upgrade my processor. And your UPS would run this for at least TWO years. http://www.wpclipart.com/computer/PC...cuum_tubes.png Who needs those wimpy arse vacuum tubes. A real man works with these... http://www.qsl.net/oz1dku/loran%20PA%20tubes.jpg These are water-cooled PA tubes for Loran transmitters. Filament current 300A at 12.7V. Plate voltage 15,000 VDC. Output power 1.5MW. When they went bad we hollowed them out, wired them for 120AC and made 25 lb desk lamps out of them. I guess they didn't come up with a transistor to replace that one They did, but it was many years after I worked on them. The timing equipment had _just_ gone solid state when I started working on it but the transmitters were still vacuum tube. In fact, when my class finished basic ET school, the guys that were going on to Loran school were split into 2 groups: those that were going to stations with vacuum tube timing equipment and those that were going to stations that had been upgraded. I got lucky. The techs at LorSta Sylt Germany were upgrading the equipment while I was going to school in NYC to learn how to work on it. By the time I got to Sylt the old equipment was in the hallway and the new equipment had just gone on air. As it turned out, I enjoyed working on the old transmitters more than the new timing equipment so I spent most of my time in the transmitter building, a quarter mile from the main station. At all Loran stations the transmitter building, which was at the base of the tower, was always placed as far from the main station as the tower was high. Even though the towers were guyed to spin straight down if they failed, they still placed them where they couldn't reach main station if they ever fell over sideways. The thing about the old transmitters is that they constantly needed preventative maintenance and when they broke you actually had to troubleshoot them instead of just swapping out circuit boards. There was always something to do and you got to play with high voltage and real tools. Besides, the station officers were mostly afraid of the high voltage so they left us alone when we were out there. My favorite troubleshooting time was when we had to find the cause of an arc inside the transmitter. The transmitters had metal plates covering various sections and sometimes they would arc internally where we couldn't see what was going on. We would remove the metal plates, turn off the lights in the transmitter building, and run the power supply up to the normal 15KV operating voltage. If it didn't arc soon enough for our liking, we'd run it up to 20KV, wait a little while then run it up to 25KV. At that voltage, anything that was going to arc usually did - and with authority. Even though you knew it was coming, it still scared the crap out of you. |
#43
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Adding UPS to light circuit
On Thu, 13 Feb 2014 00:03:07 +0000 (UTC), DerbyDad03
wrote: Stormin Mormon wrote: On 2/12/2014 8:03 AM, philo wrote: That's weird, my UPS system will power my laptop for about a year or so. https://scontent-a-iad.xx.fbcdn.net/...86645054_n.jpg http://www.columbia.edu/cu/computinghistory/tubes.jpg They keep trying to upgrade my processor. And your UPS would run this for at least TWO years. http://www.wpclipart.com/computer/PC...cuum_tubes.png Who needs those wimpy arse vacuum tubes. A real man works with these... http://www.qsl.net/oz1dku/loran%20PA%20tubes.jpg These are water-cooled PA tubes for Loran transmitters. Filament current 300A at 12.7V. Plate voltage 15,000 VDC. Output power 1.5MW. When they went bad we hollowed them out, wired them for 120AC and made 25 lb desk lamps out of them. Weren't those 4CX1000 tubes? |
#44
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Adding UPS to light circuit
wrote in message news:a2add6e8-9f45-43be-a90a-
stuff snipped True, but it doesn't have to be used that way. He could have a typical UPS that you'd use for say a PC, leave it plugged in and only connect it manually to lights when the power goes out. If he does that by plugging in some floor lamps, that's cool. But it sounded like he wants to put plugs on the end of his existing light circuits in the house, which isn't kosher. Oy vay, is it NOT kosher. He asked if there was a way to do with that would not use a transfer switch AND would be "inspectable." No way, Jose. I got a whole bunch of Philips' "Stumble Lights" from a wholesaler a few years back. They are 4 LED units with motion and ambient light detectors that run off a 9VDC wall wart. To make them work during a power failure I removed the wall warts and now they are all connected to a deep discharge, 80Ah wheelchair battery. Because they draw so little power on standby they can (and have) run for days when the main power has failed. Fortunately, the long wire runs back to the main battery drop the voltage almost exactly enough to run at 9VDC. As you walk through the house, even in a total power failure, the Stumble lights sense motion and light up the way. They've saved a lot of banged up knees and worse. Installed their precursor (strings of LED lights) after I forgot I had left a big, black stereo speaker on the floor and broke my toe on it one night. Yes, I agree. But from what he's written, I think the intention is to use a basic UPS that he already has and I doubt it's designed for being hardwired in. Agreed. While we can't be exactly sure of his intentions, the parameters he set (using existing gear, no transfer switch and being code-compliant) seem impossible to fulfill. At least not without an UPS the size of which I have never seen and not even then because it would still need a transfer switch. You could easily wire in 12VDC LED lights throughout the house on low voltag e wiring for far less than such a massive UPS would cost. They would be far more efficient because there would be no losses from taking a battery, creating 110VAC from it and then powering LEDs that transform that AC back into DC. As someone else pointed out, backfeeding the grid like that would not be a good idea nor would the UPS last very long. Jimmie has a good idea, it just has to be implemented in parallel with the existing lighting, not using the existing lighting. -- Bobby G. |
#45
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Adding UPS to light circuit
"JIMMIE" wrote in message ... My house lighting is all LED total wattage with all on is less than 100 watts. What I want to do is to be able to connect my light circuits to the UPS during emergencies like this ice storm that is coming up. Not worried about heat or the fridge, I have gas heater backup and not enough in the fridge to worry about. Are there approved ways of connecting in the UPS that does not involve adding a transfer switch. I was thinking about doing this with outlets and plugs so I could unplug the light circuit and plug it into the UPS. Jimmie {{{ We have similar problem with stand by lighting. We use an always on inverter as a continuous feed to the lighting. The inverter is on a triple stage flow charge and deep cycle batteries. Capacity is at least a week mostly because of the available deep cycle batteries. Side benifit I can rub the TV and radio as needed withou noticable loss of capacity. The batteries are located in the garage so push come to shove I can top off/recharge with the car. Deep cycle golf cart batteries are cheap if you feel the need to run the fridge and/or a microwave. |
#46
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Adding UPS to light circuit
On 2/12/2014 10:13 AM, Stormin Mormon wrote:
On 2/12/2014 8:03 AM, philo wrote: That's weird, my UPS system will power my laptop for about a year or so. https://scontent-a-iad.xx.fbcdn.net/...86645054_n.jpg http://www.columbia.edu/cu/computinghistory/tubes.jpg They keep trying to upgrade my processor. And your UPS would run this for at least TWO years. http://www.wpclipart.com/computer/PC...cuum_tubes.png The computer engineers had to replace tubes in those beasts on a daily basis. ^_^ TDD |
#47
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Adding UPS to light circuit
On 2/12/2014 7:17 PM, DerbyDad03 wrote:
philo wrote: On 02/12/2014 06:03 PM, DerbyDad03 wrote: Stormin Mormon wrote: On 2/12/2014 8:03 AM, philo wrote: That's weird, my UPS system will power my laptop for about a year or so. https://scontent-a-iad.xx.fbcdn.net/...86645054_n.jpg http://www.columbia.edu/cu/computinghistory/tubes.jpg They keep trying to upgrade my processor. And your UPS would run this for at least TWO years. http://www.wpclipart.com/computer/PC...cuum_tubes.png Who needs those wimpy arse vacuum tubes. A real man works with these... http://www.qsl.net/oz1dku/loran%20PA%20tubes.jpg These are water-cooled PA tubes for Loran transmitters. Filament current 300A at 12.7V. Plate voltage 15,000 VDC. Output power 1.5MW. When they went bad we hollowed them out, wired them for 120AC and made 25 lb desk lamps out of them. I guess they didn't come up with a transistor to replace that one They did, but it was many years after I worked on them. The timing equipment had _just_ gone solid state when I started working on it but the transmitters were still vacuum tube. In fact, when my class finished basic ET school, the guys that were going on to Loran school were split into 2 groups: those that were going to stations with vacuum tube timing equipment and those that were going to stations that had been upgraded. I got lucky. The techs at LorSta Sylt Germany were upgrading the equipment while I was going to school in NYC to learn how to work on it. By the time I got to Sylt the old equipment was in the hallway and the new equipment had just gone on air. As it turned out, I enjoyed working on the old transmitters more than the new timing equipment so I spent most of my time in the transmitter building, a quarter mile from the main station. At all Loran stations the transmitter building, which was at the base of the tower, was always placed as far from the main station as the tower was high. Even though the towers were guyed to spin straight down if they failed, they still placed them where they couldn't reach main station if they ever fell over sideways. The thing about the old transmitters is that they constantly needed preventative maintenance and when they broke you actually had to troubleshoot them instead of just swapping out circuit boards. There was always something to do and you got to play with high voltage and real tools. Besides, the station officers were mostly afraid of the high voltage so they left us alone when we were out there. My favorite troubleshooting time was when we had to find the cause of an arc inside the transmitter. The transmitters had metal plates covering various sections and sometimes they would arc internally where we couldn't see what was going on. We would remove the metal plates, turn off the lights in the transmitter building, and run the power supply up to the normal 15KV operating voltage. If it didn't arc soon enough for our liking, we'd run it up to 20KV, wait a little while then run it up to 25KV. At that voltage, anything that was going to arc usually did - and with authority. Even though you knew it was coming, it still scared the crap out of you. You could attach a circular florescent lamp to a ball cap like it was a propeller beanie and have enough light to work by when you were near the transmitter. ^_^ TDD |
#48
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Adding UPS to light circuit
The Daring Dufas wrote:
On 2/12/2014 7:17 PM, DerbyDad03 wrote: ....stuff about transmitters snipped... You could attach a circular florescent lamp to a ball cap like it was a propeller beanie and have enough light to work by when you were near the transmitter. ^_^ TDD We used hold fluorescent tubes near the tower. As you'd slide your hand up and down the tube, it would light up only above your hand. It was pretty cool to be able to "move" light. |
#49
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Adding UPS to light circuit
On Wednesday, February 12, 2014 7:13:38 PM UTC-5, wrote:
On Wed, 12 Feb 2014 06:53:28 -0800, Lab Lover wrote: On Tue, 11 Feb 2014 22:20:50 -0600, Unquestionably Confused wrote: On 2/11/2014 9:51 PM, Metspitzer wrote: On Tue, 11 Feb 2014 19:43:37 -0800 (PST), JIMMIE wrote: My house lighting is all LED total wattage with all on is less than 100 watts. What I want to do is to be able to connect my light circuits to the UPS during emergencies like this ice storm that is coming up. Not worried about heat or the fridge, I have gas heater backup and not enough in the fridge to worry about. Are there approved ways of connecting in the UPS that does not involve adding a transfer switch. I was thinking about doing this with outlets and plugs so I could unplug the light circuit and plug it into the UPS. Jimmie That is an interesting question. What kind of UPS are you talking about? The ones for computers only last for around an hour. Jimmie, if you're using the UPS to insert 120V into that lighting circuit you MUST have a transfer switch or some sort of lockout otherwise there is no way you can insure that you're not backfeeding the grid. Then, too, if you're back feeding the grid with that UPS, you can expect it to run for about 1 millisecond before total discharge g If you study just how a manual transfer switch (Reliant, etc) works and interfaces with your circuit breaker panel, you can probably - if you're really handy and adventuresome - cobble up a one or two circuit transfer switch. Just remember you want to break a connection before making a connection. I wonder why the OP has not revisited his thread? A UPS, by definition is an isolated supply. In other words, it is constantly charging it's battery and the load is always running from AC power which is created by inverting the DC. When the house current is disconnected, the load continues to operate without interruption (hence the "U" in UPS). Not necessarilly true. Only "dual conversion" UPS work that way - and that is just the high end of the UPS spectrum. I seriously doubt the total power consumed by the OP's whole house LED lighting is less than 100 watts. There is a fair amount of power wasted and dissipated as heat in the typical power supplies used for LED lighting. However, he could have a very small house. My finished basement runs about 75 watts. The kitchen is about 45 or 50. Each bedroom is 13. The living room can run as high as 55 watts. We could quite easily manage on less than 100 watts of LED at a time. Regardless, if the OP were to simply isolate the circuits which power the LEDs and have nothing else on those circuits, he could easily connect those circuits to the UPS on a permanent basis. A good 1500 - 2000 W UPS would provide reasonable protection for the LED power supply components and a fairly decent run time during a blackout. Obviously, the above requires a reasonable understanding of residential wiring, NEC and local codes in order to accomplish this in a safe manner. And he needs a "hard wire" UPS. Cannot connect a "plug in" UPS permanently to house wiring and meet code. He didn't say he wanted to plug it in permanently. He only said he wants to use the UPS when power goes out. That mode is no different than using a portable gas generator to power the house which you can do as long as you have a transfer switch or panel lockout kit installed together with an inlet. You then use an extension cord to connect the generator. He could do the same thing with his UPS. |
#51
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Adding UPS to light circuit
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#52
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Adding UPS to light circuit
On 02/12/2014 07:17 PM, DerbyDad03 wrote:
philo wrote: On 02/12/2014 06:03 PM, DerbyDad03 wrote: Stormin Mormon wrote: On 2/12/2014 8:03 AM, philo wrote: That's weird, my UPS system will power my laptop for about a year or so. https://scontent-a-iad.xx.fbcdn.net/...86645054_n.jpg http://www.columbia.edu/cu/computinghistory/tubes.jpg They keep trying to upgrade my processor. And your UPS would run this for at least TWO years. http://www.wpclipart.com/computer/PC...cuum_tubes.png Who needs those wimpy arse vacuum tubes. A real man works with these... http://www.qsl.net/oz1dku/loran%20PA%20tubes.jpg These are water-cooled PA tubes for Loran transmitters. Filament current 300A at 12.7V. Plate voltage 15,000 VDC. Output power 1.5MW. When they went bad we hollowed them out, wired them for 120AC and made 25 lb desk lamps out of them. I guess they didn't come up with a transistor to replace that one They did, but it was many years after I worked on them. The timing equipment had _just_ gone solid state when I started working on it but the transmitters were still vacuum tube. X snipped but read Back in the 60's when I first got my ham ticket we'd always hear Loran I figured that now with GPS it would no longer be used, but a quick Google search shows it's still in use. Sure liked those old days of vacuum tubes. A friend of mine picked up a couple of WW-II radar sets and converted them to 1296 mhz transceivers. In 1965 that was quite an advanced project. As to finding high-voltage arc-overs. I still recall watching TV at a friend's house and him telling me that his dad had to put a glass ash tray inside to prevent arcing over! |
#53
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Adding UPS to light circuit
On 2/11/2014 9:43 PM, JIMMIE wrote:
My house lighting is all LED total wattage with all on is less than 100 watts. What I want to do is to be able to connect my light circuits to the UPS during emergencies like this ice storm that is coming up. Not worried about heat or the fridge, I have gas heater backup and not enough in the fridge to worry about. Are there approved ways of connecting in the UPS that does not involve adding a transfer switch. I was thinking about doing this with outlets and plugs so I could unplug the light circuit and plug it into the UPS. Jimmie The easiest thing to do is to run a low voltage lighting system using a 12vdc power system and battery charger. A relay to switch on the 12 volt LED lights when the power fails is simple to implement and with a proper low current fuse is quite safe. I bought a little 48 LED light panel meant to replace an automobile dome light from Amazon to play with and it and it puts out a surprising amount of light. The LED panel measures 1-1/2" X 2-5/8" and has double stick foam on the back so it can be mounted easily. I imagine you can make your own panel using 4 to 6of them and light up a room very well. I haven't measured the current draw on it but I found it is quite bright off a 9 volt battery. Low voltage wire such as telephone wire installed with a stapler could be used to wire rooms for emergency light using the little modules. ^_^ http://www.amazon.com/niceeshop-Inte...+Panel%2FLight +Lamp+Panel+-+White http://preview.tinyurl.com/n4r8vhu TDD |
#54
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Adding UPS to light circuit
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#55
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Adding UPS to light circuit
On Wed, 12 Feb 2014 08:12:27 -0700, Stormin Mormon
wrote: ..snip... Other than golf cart or marine trolling batteries, what were effective for power storage? From memory, the 12 Vdc 4 A-hr Powersonics batteries. Bruno, their chief engineer, taught me a LOT about battery chemistry and 'proper' charging and overall care of a battery. Parbly changed a lot since then. Today, there's not much reason to NOT stick a chip in each rechargeable battery just to make everything a 'system'. |
#56
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Adding UPS to light circuit
On Wed, 12 Feb 2014 08:25:43 -0700, (PeteCresswell) wrote:
Per RobertMacy: without wanting to go to an automobile battery, which wasn't allowed, Safety? TRUE! I once learned the hard way about how an automobile battery generates hydrogen gas during recharge! as in, BOOM! and no more battery, just acid running down through everything. |
#57
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Adding UPS to light circuit
On Thu, 13 Feb 2014 05:15:53 -0800 (PST), "
wrote: You're not seriously trying to compare a hanging light fixture with a plug/cord to permanenty wiring in a UPS that is not designed nor rated to be permanently wired into house circuits are you? I don't see anything wrong from a code or safety standpoint if he makes it a temporary arrangement, just like you'd do if you correctly make provisions to connect a portable generator. I see a lot wrong if he takes a typical UPS that you'd used for a PC, ie with receptacles, *******izes that and wires it into his light circuits. Let's say the OPs electrical panel is in his open garage. Mount a 1900 box under the panel so it is around 18 inches from the floor. Connected the box to the panel with a conduit. Disconnect the circuit that supplies the lights. Run the feed for the (new) receptacles in the 1900 box to the breaker the lights were on. http://www.garvinindustries.com/Elec...FShk7AodjAUAog Now take a 4 ft length of SO cord and run that cord into the side of the 1900 box. Connect the SO cord to the lighting circuit that came off the breaker that now feeds the receptacle. Now, what you have is a feed for the lights that can be disconnected by unplugging the receptacle. The receptacle is still in perfect working order. Plug the UPS and the lighting circuit into the receptacle for 8 hours until the UPS charges. Then, unplug the lighting receptacle from the receptacle and plug it into the UPS. The UPS has the automatic transfer built in. No back feeding. No jury rigging. Nothing against code I know of. Anita Snugsnatch |
#58
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Adding UPS to light circuit
On Thursday, February 13, 2014 11:35:53 AM UTC-5, Metspitzer wrote:
On Thu, 13 Feb 2014 05:15:53 -0800 (PST), " wrote: You're not seriously trying to compare a hanging light fixture with a plug/cord to permanenty wiring in a UPS that is not designed nor rated to be permanently wired into house circuits are you? I don't see anything wrong from a code or safety standpoint if he makes it a temporary arrangement, just like you'd do if you correctly make provisions to connect a portable generator. I see a lot wrong if he takes a typical UPS that you'd used for a PC, ie with receptacles, *******izes that and wires it into his light circuits. Let's say the OPs electrical panel is in his open garage. Mount a 1900 box under the panel so it is around 18 inches from the floor. Connected the box to the panel with a conduit. Disconnect the circuit that supplies the lights. Run the feed for the (new) receptacles in the 1900 box to the breaker the lights were on. http://www.garvinindustries.com/Elec...FShk7AodjAUAog Now take a 4 ft length of SO cord and run that cord into the side of the 1900 box. Connect the SO cord to the lighting circuit that came off the breaker that now feeds the receptacle. I don't think you'll find SO cord listed in the NEC as an acceptable wiring material for branch circuits, so there's that. Now, what you have is a feed for the lights that can be disconnected by unplugging the receptacle. The receptacle is still in perfect working order. The receptacle that you've now connected to the panel circuit breaker isn't the problem. That's permissible. It's the branch circuit that you've disconnected and what you're doing with it that's the problem. Plug the UPS and the lighting circuit into the receptacle for 8 hours until the UPS charges. So now you have a branch circuit plugged on a cord plugged into a receptacle, ie not permanently wired. I'm sure that's a code violation. Then, unplug the lighting receptacle from the receptacle and plug it into the UPS. And there is the next problem. You now have a branch circuit that's on a cord and the branch circuit protection, ie the breaker in the panel, is no longer protecting the circuit. You could take a 15A branch circuit that's wired with 14 gauge and plug it into a 20A UPS or generator outlet. Or another outlet in the house that's 20A for that matter, when the alternate power source isn't used. And I would think it may violate other sections of the code, for example grounding conductors. I would expect that you'd find that the grounding for light fixtures, circuits, etc calls for a continous uninterruped ground connection back to the main ground at the panel. By inserting a corded plug that can be unplugged, you're changing what should be permanent into something that can be unplugged. The UPS has the automatic transfer built in. No back feeding. No jury rigging. Nothing against code I know of. Taking an existing branch circuit off it's over current protection, ie breaker, at the panel and putting in on a cord and plug sure sounds like j rigging to me. And it's clearly against code. Perhaps Gfre or Bud would like to weigh in on this. |
#59
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Adding UPS to light circuit
On Wed, 12 Feb 2014 23:38:16 -0500, "Robert Green"
wrote: wrote in message news:a2add6e8-9f45-43be-a90a- stuff snipped True, but it doesn't have to be used that way. He could have a typical UPS that you'd use for say a PC, leave it plugged in and only connect it manually to lights when the power goes out. If he does that by plugging in some floor lamps, that's cool. But it sounded like he wants to put plugs on the end of his existing light circuits in the house, which isn't kosher. Oy vay, is it NOT kosher. He asked if there was a way to do with that would not use a transfer switch AND would be "inspectable." No way, Jose. I got a whole bunch of Philips' "Stumble Lights" from a wholesaler a few years back. They are 4 LED units with motion and ambient light detectors that run off a 9VDC wall wart. To make them work during a power failure I removed the wall warts and now they are all connected to a deep discharge, 80Ah wheelchair battery. Because they draw so little power on standby they can (and have) run for days when the main power has failed. Fortunately, the long wire runs back to the main battery drop the voltage almost exactly enough to run at 9VDC. As you walk through the house, even in a total power failure, the Stumble lights sense motion and light up the way. They've saved a lot of banged up knees and worse. Installed their precursor (strings of LED lights) after I forgot I had left a big, black stereo speaker on the floor and broke my toe on it one night. Yes, I agree. But from what he's written, I think the intention is to use a basic UPS that he already has and I doubt it's designed for being hardwired in. Agreed. While we can't be exactly sure of his intentions, the parameters he set (using existing gear, no transfer switch and being code-compliant) seem impossible to fulfill. At least not without an UPS the size of which I have never seen and not even then because it would still need a transfer switch. I cannot for the life of me figure out where the fixation on a transfer switch is coming from. A UPS by it's very DESIGN has a transfer switch built in. Standby UPS even have a spec for "transfer time" - the time it takes to switch from line to inverter - and it is IMPOSSIBLE for the inverter to backfeed the line. Absolutely, 100% positively impossible. BUT the UPS MUST be installed permanently into the circuit in order to function - and this requires a UPS designed for hardwire installation. There are LOTS of them available - but not at your typical WallMart or consumer electronics store. You could easily wire in 12VDC LED lights throughout the house on low voltag e wiring for far less than such a massive UPS would cost. They would be far more efficient because there would be no losses from taking a battery, creating 110VAC from it and then powering LEDs that transform that AC back into DC. As someone else pointed out, backfeeding the grid like that would not be a good idea nor would the UPS last very long. Jimmie has a good idea, it just has to be implemented in parallel with the existing lighting, not using the existing lighting. |
#60
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Adding UPS to light circuit
On Thu, 13 Feb 2014 11:35:53 -0500, Metspitzer
wrote: On Thu, 13 Feb 2014 05:15:53 -0800 (PST), " wrote: You're not seriously trying to compare a hanging light fixture with a plug/cord to permanenty wiring in a UPS that is not designed nor rated to be permanently wired into house circuits are you? I don't see anything wrong from a code or safety standpoint if he makes it a temporary arrangement, just like you'd do if you correctly make provisions to connect a portable generator. I see a lot wrong if he takes a typical UPS that you'd used for a PC, ie with receptacles, *******izes that and wires it into his light circuits. Let's say the OPs electrical panel is in his open garage. Mount a 1900 box under the panel so it is around 18 inches from the floor. Connected the box to the panel with a conduit. Disconnect the circuit that supplies the lights. Run the feed for the (new) receptacles in the 1900 box to the breaker the lights were on. http://www.garvinindustries.com/Elec...FShk7AodjAUAog Now take a 4 ft length of SO cord and run that cord into the side of the 1900 box. Connect the SO cord to the lighting circuit that came off the breaker that now feeds the receptacle. Now, what you have is a feed for the lights that can be disconnected by unplugging the receptacle. The receptacle is still in perfect working order. Plug the UPS and the lighting circuit into the receptacle for 8 hours until the UPS charges. Then, unplug the lighting receptacle from the receptacle and plug it into the UPS. The UPS has the automatic transfer built in. No back feeding. No jury rigging. Nothing against code I know of. Anita Snugsnatch You don't know your code. Around here, anyways, permanently installed house wiring may NOT be connected using a plug. Period. Even getting a furnace to pass being plugged in can be a challenge. |
#61
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Adding UPS to light circuit
On Thursday, February 13, 2014 1:24:32 PM UTC-5, wrote:
On Wed, 12 Feb 2014 23:38:16 -0500, "Robert Green" wrote: wrote in message news:a2add6e8-9f45-43be-a90a- stuff snipped True, but it doesn't have to be used that way. He could have a typical UPS that you'd use for say a PC, leave it plugged in and only connect it manually to lights when the power goes out. If he does that by plugging in some floor lamps, that's cool. But it sounded like he wants to put plugs on the end of his existing light circuits in the house, which isn't kosher. Oy vay, is it NOT kosher. He asked if there was a way to do with that would not use a transfer switch AND would be "inspectable." No way, Jose. I got a whole bunch of Philips' "Stumble Lights" from a wholesaler a few years back. They are 4 LED units with motion and ambient light detectors that run off a 9VDC wall wart. To make them work during a power failure I removed the wall warts and now they are all connected to a deep discharge, 80Ah wheelchair battery. Because they draw so little power on standby they can (and have) run for days when the main power has failed. Fortunately, the long wire runs back to the main battery drop the voltage almost exactly enough to run at 9VDC. As you walk through the house, even in a total power failure, the Stumble lights sense motion and light up the way. They've saved a lot of banged up knees and worse. Installed their precursor (strings of LED lights) after I forgot I had left a big, black stereo speaker on the floor and broke my toe on it one night. Yes, I agree. But from what he's written, I think the intention is to use a basic UPS that he already has and I doubt it's designed for being hardwired in. Agreed. While we can't be exactly sure of his intentions, the parameters he set (using existing gear, no transfer switch and being code-compliant) seem impossible to fulfill. At least not without an UPS the size of which I have never seen and not even then because it would still need a transfer switch. I cannot for the life of me figure out where the fixation on a transfer switch is coming from. Because that's one code compliant way to use an existing garden variety UPS like it sounds the OP has, ie the type that has a plug, cord, and receptacles, like you'd use with a PC. With a transfer switch or a panel lockout kit and inlet, you can hook a portable generator up with an extension cord and it's code compliant. You can do the same with the UPS he's using for his PC. How practical it all is, and is it worth it, those are different questions. A UPS by it's very DESIGN has a transfer switch built in. Standby UPS even have a spec for "transfer time" - the time it takes to switch from line to inverter - and it is IMPOSSIBLE for the inverter to backfeed the line. Absolutely, 100% positively impossible. BUT the UPS MUST be installed permanently into the circuit in order to function - and this requires a UPS designed for hardwire installation. There are LOTS of them available - but not at your typical WallMart or consumer electronics store. Which by all indications in *not* the type he has and wants to use. If he wants to buy one that will be hardwired in, then yes, I agree he could find one. |
#62
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Adding UPS to light circuit
On Thursday, February 13, 2014 10:55:12 AM UTC-5, The Daring Dufas wrote:
On 2/11/2014 9:43 PM, JIMMIE wrote: My house lighting is all LED total wattage with all on is less than 100 watts. What I want to do is to be able to connect my light circuits to the UPS during emergencies like this ice storm that is coming up. Not worried about heat or the fridge, I have gas heater backup and not enough in the fridge to worry about. Are there approved ways of connecting in the UPS that does not involve adding a transfer switch. I was thinking about doing this with outlets and plugs so I could unplug the light circuit and plug it into the UPS. Jimmie The easiest thing to do is to run a low voltage lighting system using a 12vdc power system and battery charger. A relay to switch on the 12 volt LED lights when the power fails is simple to implement and with a proper low current fuse is quite safe. I bought a little 48 LED light panel meant to replace an automobile dome light from Amazon to play with and it and it puts out a surprising amount of light. The LED panel measures 1-1/2" X 2-5/8" and has double stick foam on the back so it can be mounted easily. I imagine you can make your own panel using 4 to 6of them and light up a room very well. I haven't measured the current draw on it but I found it is quite bright off a 9 volt battery. Low voltage wire such as telephone wire installed with a stapler could be used to wire rooms for emergency light using the little modules. ^_^ I think you'll find that telephone wire is probably not rated for use in a low voltage lighting system in a house. There is NEC that applies to those types of installations too. |
#63
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Adding UPS to light circuit
On 2/13/2014 6:11 AM, DerbyDad03 wrote:
The Daring Dufas wrote: On 2/12/2014 7:17 PM, DerbyDad03 wrote: ...stuff about transmitters snipped... You could attach a circular florescent lamp to a ball cap like it was a propeller beanie and have enough light to work by when you were near the transmitter. ^_^ TDD We used hold fluorescent tubes near the tower. As you'd slide your hand up and down the tube, it would light up only above your hand. It was pretty cool to be able to "move" light. I used to check the output of the two way radios I was working on by holding a fluorescent tube near or touching the contacts to the antenna. CB radio rigs with illegal linear amps would really light one up. ^_^ TDD |
#64
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Adding UPS to light circuit
philo wrote:
On 02/12/2014 07:17 PM, DerbyDad03 wrote: philo wrote: On 02/12/2014 06:03 PM, DerbyDad03 wrote: Stormin Mormon wrote: On 2/12/2014 8:03 AM, philo wrote: That's weird, my UPS system will power my laptop for about a year or so. https://scontent-a-iad.xx.fbcdn.net/...86645054_n.jpg http://www.columbia.edu/cu/computinghistory/tubes.jpg They keep trying to upgrade my processor. And your UPS would run this for at least TWO years. http://www.wpclipart.com/computer/PC...cuum_tubes.png Who needs those wimpy arse vacuum tubes. A real man works with these... http://www.qsl.net/oz1dku/loran%20PA%20tubes.jpg These are water-cooled PA tubes for Loran transmitters. Filament current 300A at 12.7V. Plate voltage 15,000 VDC. Output power 1.5MW. When they went bad we hollowed them out, wired them for 120AC and made 25 lb desk lamps out of them. I guess they didn't come up with a transistor to replace that one They did, but it was many years after I worked on them. The timing equipment had _just_ gone solid state when I started working on it but the transmitters were still vacuum tube. X snipped but read Back in the 60's when I first got my ham ticket we'd always hear Loran I figured that now with GPS it would no longer be used, but a quick Google search shows it's still in use. Sure liked those old days of vacuum tubes. A friend of mine picked up a couple of WW-II radar sets and converted them to 1296 mhz transceivers. In 1965 that was quite an advanced project. As to finding high-voltage arc-overs. I still recall watching TV at a friend's house and him telling me that his dad had to put a glass ash tray inside to prevent arcing over! There's not near as much Loran left as there used to be. Here's a video of what happened to the tower I used to hang out under at LorSta Port Clarence... http://www.youtube.com/watch?v=u92YYdy6Lak |
#66
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Adding UPS to light circuit
On 02/13/2014 03:02 PM, DerbyDad03 wrote:
phi Back in the 60's when I first got my ham ticket we'd always hear Loran I figured that now with GPS it would no longer be used, but a quick Google search shows it's still in use. Sure liked those old days of vacuum tubes. A friend of mine picked up a couple of WW-II radar sets and converted them to 1296 mhz transceivers. In 1965 that was quite an advanced project. As to finding high-voltage arc-overs. I still recall watching TV at a friend's house and him telling me that his dad had to put a glass ash tray inside to prevent arcing over! There's not near as much Loran left as there used to be. Here's a video of what happened to the tower I used to hang out under at LorSta Port Clarence... http://www.youtube.com/watch?v=u92YYdy6Lak Nice way to take down a tower. |
#67
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Adding UPS to light circuit
philo wrote:
On 02/13/2014 03:02 PM, DerbyDad03 wrote: phi Back in the 60's when I first got my ham ticket we'd always hear Loran I figured that now with GPS it would no longer be used, but a quick Google search shows it's still in use. Sure liked those old days of vacuum tubes. A friend of mine picked up a couple of WW-II radar sets and converted them to 1296 mhz transceivers. In 1965 that was quite an advanced project. As to finding high-voltage arc-overs. I still recall watching TV at a friend's house and him telling me that his dad had to put a glass ash tray inside to prevent arcing over! There's not near as much Loran left as there used to be. Here's a video of what happened to the tower I used to hang out under at LorSta Port Clarence... http://www.youtube.com/watch?v=u92YYdy6Lak Nice way to take down a tower. Yep. The T building that they "missed" is where I spent countless hours during my year there. There was a 1/4 mile enclosed walkway from the station to the T building. Call it an above ground tunnel. We had a couple of old bicycles with big baskets as wide as the handlebars for carrying parts to and from. There were a few lights along the wall so it wasn't pitch black in the tunnel. Dark, but not pitch black. One day lightening struck the tower and started a fire in the antenna coupler inside the building. It also killed power to the building which took out the lights in the tunnel. There was an small emergency light at each end of the tunnel but for the most part the rest of the tunnel was now pitch black. When the alarm went off, being young, foolish and dedicated, I jumped on one of the bicycles and headed for the T building down the long dark tunnel. Those were my babies and I had to save them. Since I couldn't see anything except for the faint light at the end of the tunnel, I leaned the big basket against the ice covered wall and pedaled as fast as I could. I had walked the tunnel so many times that I knew there was nothing to hit so I just kept peddling as the light faded from behind me and kept going until the light at the other end allowed me to see again. I made it to building, grabbed a fire extinguisher from the front room, felt the door to the transmitter room for heat, opened it slowly, went in and emptied the CO2 into the antenna coupler. My heart sank as I saw the burnt mass of copper tubing and ceramic resistors. Antenna couplers _never_ go bad, so no one keeps a spare on site. I knew we would be off air for at least a week. If a station is off air for more than one minute per month, you have ruined a "perfect month". We had just gotten an award for 6 straight months of zero off air time. The run was now over...big time. |
#68
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Adding UPS to light circuit
On Thu, 13 Feb 2014 15:03:17 -0600, The Daring Dufas
wrote: On 2/13/2014 1:25 PM, wrote: On Thursday, February 13, 2014 10:55:12 AM UTC-5, The Daring Dufas wrote: On 2/11/2014 9:43 PM, JIMMIE wrote: My house lighting is all LED total wattage with all on is less than 100 watts. What I want to do is to be able to connect my light circuits to the UPS during emergencies like this ice storm that is coming up. Not worried about heat or the fridge, I have gas heater backup and not enough in the fridge to worry about. Are there approved ways of connecting in the UPS that does not involve adding a transfer switch. I was thinking about doing this with outlets and plugs so I could unplug the light circuit and plug it into the UPS. Jimmie The easiest thing to do is to run a low voltage lighting system using a 12vdc power system and battery charger. A relay to switch on the 12 volt LED lights when the power fails is simple to implement and with a proper low current fuse is quite safe. I bought a little 48 LED light panel meant to replace an automobile dome light from Amazon to play with and it and it puts out a surprising amount of light. The LED panel measures 1-1/2" X 2-5/8" and has double stick foam on the back so it can be mounted easily. I imagine you can make your own panel using 4 to 6of them and light up a room very well. I haven't measured the current draw on it but I found it is quite bright off a 9 volt battery. Low voltage wire such as telephone wire installed with a stapler could be used to wire rooms for emergency light using the little modules. ^_^ I think you'll find that telephone wire is probably not rated for use in a low voltage lighting system in a house. There is NEC that applies to those types of installations too. Jesus H Christopher! It's a DIY project not wiring the Smithsonian! Telephone system cable caries 48vdc talk battery and 90vac ringing voltage. It's not high current and neither is the power required by the 12vdc LED modules. The OP could use thermostat wire which is rated for up to 300 volts. He can install his low voltage lighting, measure the current draw then install a proper fuse to protect the wiring which will prevent the magic smoke from escaping. o_O TDD IF he wires it correctly he can use bell wire. But what he can NOT do is wire 100 watts of LED on a single run of bell wire because that requires almost 10 amps of current - on a wire that is only rated for 2.3 amps for power transmission. |
#69
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Adding UPS to light circuit
On Thursday, February 13, 2014 4:03:17 PM UTC-5, The Daring Dufas wrote:
On 2/13/2014 1:25 PM, wrote: On Thursday, February 13, 2014 10:55:12 AM UTC-5, The Daring Dufas wrote: On 2/11/2014 9:43 PM, JIMMIE wrote: My house lighting is all LED total wattage with all on is less than 100 watts. What I want to do is to be able to connect my light circuits to the UPS during emergencies like this ice storm that is coming up. Not worried about heat or the fridge, I have gas heater backup and not enough in the fridge to worry about. Are there approved ways of connecting in the UPS that does not involve adding a transfer switch. I was thinking about doing this with outlets and plugs so I could unplug the light circuit and plug it into the UPS. Jimmie The easiest thing to do is to run a low voltage lighting system using a 12vdc power system and battery charger. A relay to switch on the 12 volt LED lights when the power fails is simple to implement and with a proper low current fuse is quite safe. I bought a little 48 LED light panel meant to replace an automobile dome light from Amazon to play with and it and it puts out a surprising amount of light. The LED panel measures 1-1/2" X 2-5/8" and has double stick foam on the back so it can be mounted easily. I imagine you can make your own panel using 4 to 6of them and light up a room very well. I haven't measured the current draw on it but I found it is quite bright off a 9 volt battery. Low voltage wire such as telephone wire installed with a stapler could be used to wire rooms for emergency light using the little modules. ^_^ I think you'll find that telephone wire is probably not rated for use in a low voltage lighting system in a house. There is NEC that applies to those types of installations too. Jesus H Christopher! It's a DIY project not wiring the Smithsonian! Telephone system cable caries 48vdc talk battery and 90vac ringing voltage. It's not high current and neither is the power required by the 12vdc LED modules. The OP could use thermostat wire which is rated for up to 300 volts. He can install his low voltage lighting, measure the current draw then install a proper fuse to protect the wiring which will prevent the magic smoke from escaping. o_O TDD I didn't say he couldn't do it. I just said that NEC applies to low voltage circuits run within a house too, and that I have doubts that using telephone wire to power lights will meet code. Whether it's DIY or done by an electrician code still applies. If he wants to ignore that, he's free to do so. |
#70
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Adding UPS to light circuit
On 2/13/2014 4:03 PM, wrote:
On Thu, 13 Feb 2014 15:03:17 -0600, The Daring Dufas wrote: On 2/13/2014 1:25 PM, wrote: On Thursday, February 13, 2014 10:55:12 AM UTC-5, The Daring Dufas wrote: On 2/11/2014 9:43 PM, JIMMIE wrote: My house lighting is all LED total wattage with all on is less than 100 watts. What I want to do is to be able to connect my light circuits to the UPS during emergencies like this ice storm that is coming up. Not worried about heat or the fridge, I have gas heater backup and not enough in the fridge to worry about. Are there approved ways of connecting in the UPS that does not involve adding a transfer switch. I was thinking about doing this with outlets and plugs so I could unplug the light circuit and plug it into the UPS. Jimmie The easiest thing to do is to run a low voltage lighting system using a 12vdc power system and battery charger. A relay to switch on the 12 volt LED lights when the power fails is simple to implement and with a proper low current fuse is quite safe. I bought a little 48 LED light panel meant to replace an automobile dome light from Amazon to play with and it and it puts out a surprising amount of light. The LED panel measures 1-1/2" X 2-5/8" and has double stick foam on the back so it can be mounted easily. I imagine you can make your own panel using 4 to 6of them and light up a room very well. I haven't measured the current draw on it but I found it is quite bright off a 9 volt battery. Low voltage wire such as telephone wire installed with a stapler could be used to wire rooms for emergency light using the little modules. ^_^ I think you'll find that telephone wire is probably not rated for use in a low voltage lighting system in a house. There is NEC that applies to those types of installations too. Jesus H Christopher! It's a DIY project not wiring the Smithsonian! Telephone system cable caries 48vdc talk battery and 90vac ringing voltage. It's not high current and neither is the power required by the 12vdc LED modules. The OP could use thermostat wire which is rated for up to 300 volts. He can install his low voltage lighting, measure the current draw then install a proper fuse to protect the wiring which will prevent the magic smoke from escaping. o_O TDD IF he wires it correctly he can use bell wire. But what he can NOT do is wire 100 watts of LED on a single run of bell wire because that requires almost 10 amps of current - on a wire that is only rated for 2.3 amps for power transmission. Forgive me for not remembering that others will not take into consideration those things I do without thinking. Those little panels with 48 SMD LED's draw very little current and like any other electrical project I've ever done, I will figure in the current draw of the project before I install anything. I haven't measured the current draw of the little SMD LED light panels but I'm sure it's not much at all. TDD |
#71
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Adding UPS to light circuit
On Thu, 13 Feb 2014 17:32:02 -0600, The Daring Dufas
wrote: On 2/13/2014 4:03 PM, wrote: On Thu, 13 Feb 2014 15:03:17 -0600, The Daring Dufas wrote: On 2/13/2014 1:25 PM, wrote: On Thursday, February 13, 2014 10:55:12 AM UTC-5, The Daring Dufas wrote: On 2/11/2014 9:43 PM, JIMMIE wrote: My house lighting is all LED total wattage with all on is less than 100 watts. What I want to do is to be able to connect my light circuits to the UPS during emergencies like this ice storm that is coming up. Not worried about heat or the fridge, I have gas heater backup and not enough in the fridge to worry about. Are there approved ways of connecting in the UPS that does not involve adding a transfer switch. I was thinking about doing this with outlets and plugs so I could unplug the light circuit and plug it into the UPS. Jimmie The easiest thing to do is to run a low voltage lighting system using a 12vdc power system and battery charger. A relay to switch on the 12 volt LED lights when the power fails is simple to implement and with a proper low current fuse is quite safe. I bought a little 48 LED light panel meant to replace an automobile dome light from Amazon to play with and it and it puts out a surprising amount of light. The LED panel measures 1-1/2" X 2-5/8" and has double stick foam on the back so it can be mounted easily. I imagine you can make your own panel using 4 to 6of them and light up a room very well. I haven't measured the current draw on it but I found it is quite bright off a 9 volt battery. Low voltage wire such as telephone wire installed with a stapler could be used to wire rooms for emergency light using the little modules. ^_^ I think you'll find that telephone wire is probably not rated for use in a low voltage lighting system in a house. There is NEC that applies to those types of installations too. Jesus H Christopher! It's a DIY project not wiring the Smithsonian! Telephone system cable caries 48vdc talk battery and 90vac ringing voltage. It's not high current and neither is the power required by the 12vdc LED modules. The OP could use thermostat wire which is rated for up to 300 volts. He can install his low voltage lighting, measure the current draw then install a proper fuse to protect the wiring which will prevent the magic smoke from escaping. o_O TDD IF he wires it correctly he can use bell wire. But what he can NOT do is wire 100 watts of LED on a single run of bell wire because that requires almost 10 amps of current - on a wire that is only rated for 2.3 amps for power transmission. Forgive me for not remembering that others will not take into consideration those things I do without thinking. Those little panels with 48 SMD LED's draw very little current and like any other electrical project I've ever done, I will figure in the current draw of the project before I install anything. I haven't measured the current draw of the little SMD LED light panels but I'm sure it's not much at all. TDD One that I installed in my brother's RV was 3 watts. That's getting awfully close to the limit on the bell wire. ANd PHONE wire is generally 22 guage, not 18 - so NO. You cannot use bell wire to wire a house for low voltage lighting... |
#72
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Adding UPS to light circuit
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#73
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Adding UPS to light circuit
On Thu, 13 Feb 2014 19:08:04 -0600, The Daring Dufas
wrote: On 2/12/2014 6:31 PM, wrote: On Wed, 12 Feb 2014 10:32:43 -0500, "Sherlock.Homes" wrote: "JIMMIE" wrote in message ... My house lighting is all LED total wattage with all on is less than 100 watts. What I want to do is to be able to connect my light circuits to the UPS during emergencies like this ice storm that is coming up. Not worried about heat or the fridge, I have gas heater backup and not enough in the fridge to worry about. Are there approved ways of connecting in the UPS that does not involve adding a transfer switch. __________________________________________________ ________________________ Nope - no approved ways I know of. Lots of jury-rigged possibilities though. The only way to evade the NEC on this is to use low voltage power. Install 12VDC LED lights throughout the house on a dedicated circuit that's always powered by a large (costly) deep discharge battery on a constant charging circuit. If you use a car battery you'll severely shorten its life if you deeply discharge it more than a few times. If these are 110VAC fixtures then there's very little hope of doing what you want to do and having it approved by an inspector. But it is an interesting idea and probably will be the way things are done 50 years from now. SH Not true. There are UPS units designed for exactly this application that are hardwired into the house circuitry. It strikes me as kind of odd to use a UPS unit to convert 12-24vdc into 120vac to power low current LED lights when the power loss converting DC to AC with the UPS unit is so wasteful. I would consider a 12vdc lighting. All the new emergency exit lights I see are LED units so the OP could get LED table lamps that plug into wall outlets which would come on automatically when the power went out. Very simple plug and play which would be a lot less complicated than any rewiring. ^_^ TDD Under NORMAL USE a standby UPS is NOT converting DC to AC and turning it back into AC. That only happens with "dual conversion" or "online" UPS units. A standby UPS is, in effect, an automatic transfer switch, a battery charger, and an inverter. When there is power on the line in, it transfers (connects) directly to the line out. When the line in fails, the automatic transfer device shuts off the connection between line in and line out, pawers up the inverter, and connects the inverter output to the line out.. When line power resumes, the unit transfers from inverter output to line power, shuts off the inverter, and recharges the battery. This is how better than 90% of "consumer grade" UPS units work - and all "standby lighting" ups units. Dual Conversion UPS units are more expensive, less common, and less efficient - but classify as a seperately derived power source and TOTALLY decouple from line noise, harmonics, etc that can upset some very sensitive equipment. And any UPS of ANY size runs on 36 volts or more - most on 48 and 60 volts. |
#74
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Adding UPS to light circuit
On 2/13/2014 7:18 PM, wrote:
On Thu, 13 Feb 2014 19:08:04 -0600, The Daring Dufas wrote: On 2/12/2014 6:31 PM, wrote: On Wed, 12 Feb 2014 10:32:43 -0500, "Sherlock.Homes" wrote: "JIMMIE" wrote in message ... My house lighting is all LED total wattage with all on is less than 100 watts. What I want to do is to be able to connect my light circuits to the UPS during emergencies like this ice storm that is coming up. Not worried about heat or the fridge, I have gas heater backup and not enough in the fridge to worry about. Are there approved ways of connecting in the UPS that does not involve adding a transfer switch. __________________________________________________ ________________________ Nope - no approved ways I know of. Lots of jury-rigged possibilities though. The only way to evade the NEC on this is to use low voltage power. Install 12VDC LED lights throughout the house on a dedicated circuit that's always powered by a large (costly) deep discharge battery on a constant charging circuit. If you use a car battery you'll severely shorten its life if you deeply discharge it more than a few times. If these are 110VAC fixtures then there's very little hope of doing what you want to do and having it approved by an inspector. But it is an interesting idea and probably will be the way things are done 50 years from now. SH Not true. There are UPS units designed for exactly this application that are hardwired into the house circuitry. It strikes me as kind of odd to use a UPS unit to convert 12-24vdc into 120vac to power low current LED lights when the power loss converting DC to AC with the UPS unit is so wasteful. I would consider a 12vdc lighting. All the new emergency exit lights I see are LED units so the OP could get LED table lamps that plug into wall outlets which would come on automatically when the power went out. Very simple plug and play which would be a lot less complicated than any rewiring. ^_^ TDD Under NORMAL USE a standby UPS is NOT converting DC to AC and turning it back into AC. That only happens with "dual conversion" or "online" UPS units. A standby UPS is, in effect, an automatic transfer switch, a battery charger, and an inverter. When there is power on the line in, it transfers (connects) directly to the line out. When the line in fails, the automatic transfer device shuts off the connection between line in and line out, pawers up the inverter, and connects the inverter output to the line out.. When line power resumes, the unit transfers from inverter output to line power, shuts off the inverter, and recharges the battery. This is how better than 90% of "consumer grade" UPS units work - and all "standby lighting" ups units. Dual Conversion UPS units are more expensive, less common, and less efficient - but classify as a seperately derived power source and TOTALLY decouple from line noise, harmonics, etc that can upset some very sensitive equipment. And any UPS of ANY size runs on 36 volts or more - most on 48 and 60 volts. I rescue and repair UPS units. I have a 1kw unit on the floor behind me and a 750w unit on the counter to my left. Both units have two 12v AGM batteries in series internally and an external connector for extra 24v battery packs. I have dealt with UPS systems that were the size of a bedroom closet and filled with a dozen batteries of the size one would find under the hood of an automobile. The UPS units I possess put out a modified square wave which computers and such equipment find acceptable. I've only had to install true sine wave UPS units to power certain phone systems. ^_^ TDD |
#75
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Adding UPS to light circuit
On 2/13/2014 6:44 PM, wrote:
On Thu, 13 Feb 2014 17:32:02 -0600, The Daring Dufas wrote: On 2/13/2014 4:03 PM, wrote: On Thu, 13 Feb 2014 15:03:17 -0600, The Daring Dufas wrote: On 2/13/2014 1:25 PM, wrote: On Thursday, February 13, 2014 10:55:12 AM UTC-5, The Daring Dufas wrote: On 2/11/2014 9:43 PM, JIMMIE wrote: My house lighting is all LED total wattage with all on is less than 100 watts. What I want to do is to be able to connect my light circuits to the UPS during emergencies like this ice storm that is coming up. Not worried about heat or the fridge, I have gas heater backup and not enough in the fridge to worry about. Are there approved ways of connecting in the UPS that does not involve adding a transfer switch. I was thinking about doing this with outlets and plugs so I could unplug the light circuit and plug it into the UPS. Jimmie The easiest thing to do is to run a low voltage lighting system using a 12vdc power system and battery charger. A relay to switch on the 12 volt LED lights when the power fails is simple to implement and with a proper low current fuse is quite safe. I bought a little 48 LED light panel meant to replace an automobile dome light from Amazon to play with and it and it puts out a surprising amount of light. The LED panel measures 1-1/2" X 2-5/8" and has double stick foam on the back so it can be mounted easily. I imagine you can make your own panel using 4 to 6of them and light up a room very well. I haven't measured the current draw on it but I found it is quite bright off a 9 volt battery. Low voltage wire such as telephone wire installed with a stapler could be used to wire rooms for emergency light using the little modules. ^_^ I think you'll find that telephone wire is probably not rated for use in a low voltage lighting system in a house. There is NEC that applies to those types of installations too. Jesus H Christopher! It's a DIY project not wiring the Smithsonian! Telephone system cable caries 48vdc talk battery and 90vac ringing voltage. It's not high current and neither is the power required by the 12vdc LED modules. The OP could use thermostat wire which is rated for up to 300 volts. He can install his low voltage lighting, measure the current draw then install a proper fuse to protect the wiring which will prevent the magic smoke from escaping. o_O TDD IF he wires it correctly he can use bell wire. But what he can NOT do is wire 100 watts of LED on a single run of bell wire because that requires almost 10 amps of current - on a wire that is only rated for 2.3 amps for power transmission. Forgive me for not remembering that others will not take into consideration those things I do without thinking. Those little panels with 48 SMD LED's draw very little current and like any other electrical project I've ever done, I will figure in the current draw of the project before I install anything. I haven't measured the current draw of the little SMD LED light panels but I'm sure it's not much at all. TDD One that I installed in my brother's RV was 3 watts. That's getting awfully close to the limit on the bell wire. ANd PHONE wire is generally 22 guage, not 18 - so NO. You cannot use bell wire to wire a house for low voltage lighting... Then use landscape lighting wire or 18-16AMW stranded low voltage alarm or sound system cable. An alternative is what I do when installing CCTV cameras. I install a central 12vdc power supply and separate low voltage cables to each camera. A multi terminal central power supply used for CCTV cameras would be a good choice. It's not rocket surgery. GEEZ! TDD |
#76
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Adding UPS to light circuit
On Thursday, February 13, 2014 9:55:05 PM UTC-5, The Daring Dufas wrote:
On 2/13/2014 6:44 PM, wrote: On Thu, 13 Feb 2014 17:32:02 -0600, The Daring Dufas wrote: On 2/13/2014 4:03 PM, wrote: On Thu, 13 Feb 2014 15:03:17 -0600, The Daring Dufas wrote: On 2/13/2014 1:25 PM, wrote: On Thursday, February 13, 2014 10:55:12 AM UTC-5, The Daring Dufas wrote: On 2/11/2014 9:43 PM, JIMMIE wrote: My house lighting is all LED total wattage with all on is less than 100 watts. What I want to do is to be able to connect my light circuits to the UPS during emergencies like this ice storm that is coming up. Not worried about heat or the fridge, I have gas heater backup and not enough in the fridge to worry about. Are there approved ways of connecting in the UPS that does not involve adding a transfer switch. I was thinking about doing this with outlets and plugs so I could unplug the light circuit and plug it into the UPS. Jimmie The easiest thing to do is to run a low voltage lighting system using a 12vdc power system and battery charger. A relay to switch on the 12 volt LED lights when the power fails is simple to implement and with a proper low current fuse is quite safe. I bought a little 48 LED light panel meant to replace an automobile dome light from Amazon to play with and it and it puts out a surprising amount of light. The LED panel measures 1-1/2" X 2-5/8" and has double stick foam on the back so it can be mounted easily. I imagine you can make your own panel using 4 to 6of them and light up a room very well. I haven't measured the current draw on it but I found it is quite bright off a 9 volt battery. Low voltage wire such as telephone wire installed with a stapler could be used to wire rooms for emergency light using the little modules. ^_^ I think you'll find that telephone wire is probably not rated for use in a low voltage lighting system in a house. There is NEC that applies to those types of installations too. Jesus H Christopher! It's a DIY project not wiring the Smithsonian! Telephone system cable caries 48vdc talk battery and 90vac ringing voltage. It's not high current and neither is the power required by the 12vdc LED modules. The OP could use thermostat wire which is rated for up to 300 volts. He can install his low voltage lighting, measure the current draw then install a proper fuse to protect the wiring which will prevent the magic smoke from escaping. o_O TDD IF he wires it correctly he can use bell wire. But what he can NOT do is wire 100 watts of LED on a single run of bell wire because that requires almost 10 amps of current - on a wire that is only rated for 2.3 amps for power transmission. Forgive me for not remembering that others will not take into consideration those things I do without thinking. Those little panels with 48 SMD LED's draw very little current and like any other electrical project I've ever done, I will figure in the current draw of the project before I install anything. I haven't measured the current draw of the little SMD LED light panels but I'm sure it's not much at all. TDD One that I installed in my brother's RV was 3 watts. That's getting awfully close to the limit on the bell wire. ANd PHONE wire is generally 22 guage, not 18 - so NO. You cannot use bell wire to wire a house for low voltage lighting... Then use landscape lighting wire or 18-16AMW stranded low voltage alarm or sound system cable. Again, he can do whatever he pleases, but landscape lighting wire is most likely not rated for use inside a building. What you proposed he wire up is a Class 1 low voltage circuit and it's covered under NEC. An alternative is what I do when installing CCTV cameras. I install a central 12vdc power supply and separate low voltage cables to each camera. A multi terminal central power supply used for CCTV cameras would be a good choice. It's not rocket surgery. GEEZ! TDD It's not rocket surgery, but that doesn't mean that there aren't codes that are supposed to be followed. Why do it half-assed instead of reading the code, using the right materials, and doing it right? As an example to the practical problems you're left with, if someday he goes to sell the house, an inspector seeing phone wire used for low voltage lighting may flag it. Then he has a problem that he could have easily avoided by doing it right. |
#77
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Adding UPS to light circuit
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stuff snipped I cannot for the life of me figure out where the fixation on a transfer switch is coming from. A UPS by it's very DESIGN has a transfer switch built in. Standby UPS even have a spec for "transfer time" - the time it takes to switch from line to inverter - and it is IMPOSSIBLE for the inverter to backfeed the line. Absolutely, 100% positively impossible. Here's a scenario where the impossible becomes lethal. The power goes out. Someone reading this decides to create a male to male power cord. He plugs one end into his UPS's powered outlet and the other end into the outlet nearest his table lamp. The table lamp lights up! Just what the OP wants. Other LED lamps in the house will also probably light up until the fridge or the furnace kicks on or the utility power comes back on. Not sure what happens then. I agree with your observation, generally - no one is likely to connect the UPS to the grid in a way that will cause energization of the grid outside the home. But never underestimate the ingenuity of someone trying to accomplish a goal. It's very simple to do with two extension cords,.a wire cutter and some wire nuts. In normal UPS operation, I agree, backfeeding is not very likely, but it's not impossible. The method I described would actually work pretty well if all circuits but the ones powering the LED lamps were turned off at the breaker panel along with the main breaker. But if that main breaker is ON then 110VAC is likely traveling outside the home. -- Bobby G. |
#78
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Adding UPS to light circuit
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#79
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Adding UPS to light circuit
On Thu, 13 Feb 2014 20:28:57 -0600, The Daring Dufas
wrote: On 2/13/2014 7:18 PM, wrote: On Thu, 13 Feb 2014 19:08:04 -0600, The Daring Dufas wrote: On 2/12/2014 6:31 PM, wrote: On Wed, 12 Feb 2014 10:32:43 -0500, "Sherlock.Homes" wrote: "JIMMIE" wrote in message ... My house lighting is all LED total wattage with all on is less than 100 watts. What I want to do is to be able to connect my light circuits to the UPS during emergencies like this ice storm that is coming up. Not worried about heat or the fridge, I have gas heater backup and not enough in the fridge to worry about. Are there approved ways of connecting in the UPS that does not involve adding a transfer switch. __________________________________________________ ________________________ Nope - no approved ways I know of. Lots of jury-rigged possibilities though. The only way to evade the NEC on this is to use low voltage power. Install 12VDC LED lights throughout the house on a dedicated circuit that's always powered by a large (costly) deep discharge battery on a constant charging circuit. If you use a car battery you'll severely shorten its life if you deeply discharge it more than a few times. If these are 110VAC fixtures then there's very little hope of doing what you want to do and having it approved by an inspector. But it is an interesting idea and probably will be the way things are done 50 years from now. SH Not true. There are UPS units designed for exactly this application that are hardwired into the house circuitry. It strikes me as kind of odd to use a UPS unit to convert 12-24vdc into 120vac to power low current LED lights when the power loss converting DC to AC with the UPS unit is so wasteful. I would consider a 12vdc lighting. All the new emergency exit lights I see are LED units so the OP could get LED table lamps that plug into wall outlets which would come on automatically when the power went out. Very simple plug and play which would be a lot less complicated than any rewiring. ^_^ TDD Under NORMAL USE a standby UPS is NOT converting DC to AC and turning it back into AC. That only happens with "dual conversion" or "online" UPS units. A standby UPS is, in effect, an automatic transfer switch, a battery charger, and an inverter. When there is power on the line in, it transfers (connects) directly to the line out. When the line in fails, the automatic transfer device shuts off the connection between line in and line out, pawers up the inverter, and connects the inverter output to the line out.. When line power resumes, the unit transfers from inverter output to line power, shuts off the inverter, and recharges the battery. This is how better than 90% of "consumer grade" UPS units work - and all "standby lighting" ups units. Dual Conversion UPS units are more expensive, less common, and less efficient - but classify as a seperately derived power source and TOTALLY decouple from line noise, harmonics, etc that can upset some very sensitive equipment. And any UPS of ANY size runs on 36 volts or more - most on 48 and 60 volts. I rescue and repair UPS units. I have a 1kw unit on the floor behind me and a 750w unit on the counter to my left. Both units have two 12v AGM batteries in series internally and an external connector for extra 24v battery packs. I have dealt with UPS systems that were the size of a bedroom closet and filled with a dozen batteries of the size one would find under the hood of an automobile. The UPS units I possess put out a modified square wave which computers and such equipment find acceptable. I've only had to install true sine wave UPS units to power certain phone systems. ^_^ TDD You misunderstood me. By "of any size" I meant any large UPS - not "all UPSs.. The little cheap crap runs on 12 volts. The intermediates run on 24. 1000 watts and up GENERALLY run on higher voltage. My Powerware Presige 1000 units rin on 48 and 60 volts. So do their 750 watt units. And as far as "modified square wave" and "quasi sine wave" it's semantics. How many steps for quasi sine, and how few for modified square? True sine is different (much more costly) technology - which, as you note, is generally not required - certainly not for a lighting unit. It's one of those "cabinet style" units the OP needs to install for lighting because they have no plugs. But he does not need the dual conversion that MOST of those cabinet units run. |
#80
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Adding UPS to light circuit
On Friday, February 14, 2014 12:13:25 PM UTC-5, The Daring Dufas wrote:
On 2/14/2014 7:11 AM, wrote: On Thursday, February 13, 2014 9:55:05 PM UTC-5, The Daring Dufas An alternative is what I do when installing CCTV cameras. I install a central 12vdc power supply and separate low voltage cables to each camera. A multi terminal central power supply used for CCTV cameras would be a good choice. It's not rocket surgery. GEEZ! TDD It's not rocket surgery, but that doesn't mean that there aren't codes that are supposed to be followed. Why do it half-assed instead of reading the code, using the right materials, and doing it right? As an example to the practical problems you're left with, if someday he goes to sell the house, an inspector seeing phone wire used for low voltage lighting may flag it. Then he has a problem that he could have easily avoided by doing it right. I've installed both power and low voltage wiring in homes and businesses and never failed an inspection. Of course, because I was doing it professionally, most if not all of my wiring was concealed. All the wire met code for the circuits carrying low voltage even if it was two pair phone wire. From my reading of the code, the system you recommended is a Class 1 low voltage circuit. I believe you proposed using a 12V battery kept charged with a battery charger to power the LED lights which would be installed in the house. Clearly phone wire is not code compliant for that application. May an inspector pass it anyway? Maybe in some places and maybe not in others. The enforcement level probably isn't going to be the same in a townhouse in NYC as it is in a small town in the Midwest All I'm saying is that there are NEC codes for this type of thing and in my reading of them, you can't use phone wire. It's not even clear what phone wire means anymore, as it's usually referred to today as Cat5. My reading of the code says the minimum allowed is 18 gauge. I wired a lot of systems with beige or gray two pair phone wire and never had a problem with an inspection. The only consideration is the amount of current the wires will carry. It's not just a matter of the current the wires will carry. Read Article 725 of NEC on what specific cable types are allowed. It's like saying you can use any wire for 120V circuits, all that matters is the current carrying capability. All of the manufactured low voltage devices I've installed had a label with the amount of current each device used. If I installed home made DIY low voltage LED lights, I'm going to measure the current draw and run low voltage wiring that will carry the load, even phone wire. You keep making it way too complicated. o_O TDD It's not complicated to follow code and do it right. Is it that complicated to use the proper 18 gauge wire? In my reading of the code, that's the minimum wire size allowed for what you proposed. Have you read Articles 720, 725? |
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