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#1
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Is a burglar alarm box a junction box?
Is a burglar alarm box a junction box? It's metal and has knockouts
just like a metal junction box. Is it sufficient to contain 110v wires? I'm only thinking of putting "a little" bit of 110 volts in the box, 110 coming in, the hot wire going to one side of a relay switch and the other side of the relay switch sending the hot to the hall light switch box and the dining room light switch box, a total of 230 watts. The coil of the relay will be controlled by the burglar alarm, so that these lights go on when I arm the alarm and when I come in the front door. How does this sound? I plan to put the relay in its own small metal box, lined witha non-conductor. |
#2
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Is a burglar alarm box a junction box?
The coil of the relay will be controlled by the burglar alarm, so that these lights go on when I arm the alarm and when I come in the front door. How does this sound? I plan to put the relay in its own small metal box, lined witha non-conductor. IMO you are treading on dangerous ground as you are putting 120 volt and "control" wiring in the same box. Of course, that's done all the time in appliances and furnaces but these "boxes" get some kind of UL or whatever approval. You have some options: 1) Be careful but go ahead and put both 120 and low voltage wiring in the same container. Hope and pray you don't make a mistake and also that your don't have problems which might expose you to some liability. 2) Buy some approved apparatus that has a "low voltage" side and a "high voltage" side. 2a) One example might be the X-10 gadget that plugs into the wall for the "high voltage" side and has some screw terminals for the "low voltage" side. These have options including send "ON" when an external contact closes and "OFF" when the external contact opens. Other X-10 devices would switch the lamp load. This is the quick and dirty "off the shelf" approach. 2b) A transformer/relay "package" that is approved and has isolated high and low voltage sides. The "high voltage" wiring would come out in an attached J-box. The "low voltage" stuff would be screw terminals. I have seen this but would not know where to get my hand on it. |
#3
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Is a burglar alarm box a junction box?
mm wrote:
Is a burglar alarm box a junction box? It's metal and has knockouts just like a metal junction box. Is it sufficient to contain 110v wires? I'm only thinking of putting "a little" bit of 110 volts in the box, 110 coming in, the hot wire going to one side of a relay switch and the other side of the relay switch sending the hot to the hall light switch box and the dining room light switch box, a total of 230 watts. The coil of the relay will be controlled by the burglar alarm, so that these lights go on when I arm the alarm and when I come in the front door. How does this sound? I plan to put the relay in its own small metal box, lined witha non-conductor. I was all set to say fine, but then "a little" and no mention of the neutral and ground connections and such made me change my mind to: Get an electrician to do this for you. You aren't qualified. Whether it can be legal or not; call your local code enforcement office & ask. Pop` |
#4
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Is a burglar alarm box a junction box?
On Thu, 11 Jan 2007 12:48:18 -0500, "John Gilmer"
wrote: The coil of the relay will be controlled by the burglar alarm, so that these lights go on when I arm the alarm and when I come in the front door. How does this sound? I plan to put the relay in its own small metal box, lined witha non-conductor. IMO you are treading on dangerous ground as you are putting 120 volt and "control" wiring in the same box. Of course, that's done all the time in appliances and furnaces but these "boxes" get some kind of UL or whatever approval. You have some options: 1) Be careful but go ahead and put both 120 and low voltage wiring in the same container. Hope and pray you don't make a mistake and also that your don't have problems which might expose you to some liability. I didn't say so, but I actually had it running this way with the old burglar alarm, which eventually failed (after about 18 or 20 years). 2) Buy some approved apparatus that has a "low voltage" side and a "high voltage" side. 2a) One example might be the X-10 gadget that plugs into the wall for the "high voltage" side and has some screw terminals for the "low voltage" side. These have options including send "ON" when an external contact closes and "OFF" when the external contact opens. Other X-10 devices would switch the lamp load. This is the quick and dirty "off the shelf" approach. Doesn't X-10 all depend on radio transmissions. I'm going to use that to flash the porch light when the alarm goes off, but that's not critical. If at all possible, I like to use hard-wired things. 2b) A transformer/relay "package" that is approved and has isolated high and low voltage sides. The "high voltage" wiring would come out in an attached J-box. The "low voltage" stuff would be screw terminals. I have seen this but would not know where to get my hand on it. Well, what it has now, the professional quality alarm (used by a friend with an alarm business and over 1000 customers) comes with its own big wall wart, 16.5 volts. The 110 has to be the same phase as what supplies those light bulbs at other times, through their respective switches, because if the light is already on when I arm the alarm, I have to have the same phase 110 going to the lightbulb through both sources. I'm sure even one reading already knows that. I guess I could use a big, 250 or more watt isolation transformer. I think it would be expensive to buy and it would have to run all the time, just for those 2 minutes when I leave the house or return. Whereas, what I had in mind wouldn't cost any additional money for installation or running. |
#5
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Is a burglar alarm box a junction box?
On Thu, 11 Jan 2007 17:54:23 GMT, "Pop`"
wrote: mm wrote: Is a burglar alarm box a junction box? It's metal and has knockouts just like a metal junction box. Is it sufficient to contain 110v wires? I'm only thinking of putting "a little" bit of 110 volts in the box, 110 coming in, the hot wire going to one side of a relay switch and the other side of the relay switch sending the hot to the hall light switch box and the dining room light switch box, a total of 230 watts. The coil of the relay will be controlled by the burglar alarm, so that these lights go on when I arm the alarm and when I come in the front door. How does this sound? I plan to put the relay in its own small metal box, lined witha non-conductor. I was all set to say fine, but then "a little" and no mention of the neutral and ground connections and such made me change my mind to: Get an electrician to do this for you. You aren't qualified. I could connect the neutral and ground. The original light circuit and the switch boxes already have neutrals and grounds, but you're saying the neutral and ground which accompany the hot wire in the romex should be connected at both ends, right? Is there ever an occasion where a hot wire is run alone? Whether it can be legal or not; call your local code enforcement office & ask. They have this feature on current alarms and had it on the Moose Alarms sold 23 years ago. And my friend with the alarm business knew about the feature. Although I guess he didnt' actually say he ever used it, so I'll ask him or call the code office. (He cares about legal, so if he doens't use it and doesn't know, he'll tell me that.) Pop` |
#6
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Is a burglar alarm box a junction box?
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#7
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Is a burglar alarm box a junction box?
"mm" wrote in message ... Is a burglar alarm box a junction box? It's metal and has knockouts just like a metal junction box. Is it sufficient to contain 110v wires? I'm only thinking of putting "a little" bit of 110 volts in the box, 110 coming in, the hot wire going to one side of a relay switch and the other side of the relay switch sending the hot to the hall light switch box and the dining room light switch box, a total of 230 watts. The coil of the relay will be controlled by the burglar alarm, so that these lights go on when I arm the alarm and when I come in the front door. How does this sound? I plan to put the relay in its own small metal box, lined witha non-conductor. I would add another box, connected to the alarm box with a 1/2" plumbing nipple and those thin nuts that fasten conduit fittings into sheet metal boxes. Use two - one inside the box and one outside. Run the low voltage into the added box through the nipple to operate the relay there. Bob |
#8
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Is a burglar alarm box a junction box?
On Thu, 11 Jan 2007 12:29:49 -0500, mm
wrote: Is a burglar alarm box a junction box? It's metal and has knockouts just like a metal junction box. Is it sufficient to contain 110v wires? I'm only thinking of putting "a little" bit of 110 volts in the box, 110 coming in, the hot wire going to one side of a relay switch and the other side of the relay switch sending the hot to the hall light switch box and the dining room light switch box, a total of 230 watts. The coil of the relay will be controlled by the burglar alarm, so that these lights go on when I arm the alarm and when I come in the front door. How does this sound? I plan to put the relay in its own small metal box, lined witha non-conductor. The installations I've seen of burglar alarms, fire alarms, pbx and computer network boxes have all been set up with the electric completely separate. Typically the electric is run in and terminated with regular three prong 120 volt outlets. Then the alarm installers (and other system installers) nail a hunk of plywood to the wall, hang all their stuff on that, and plug it in to the 120 volt outlet just like you'd plug in a toaster. Same was true in our parking lot with the stuff all in the same large metal enclosure. Separate electric, plywood bolted to the inside of the metal enclosure, etc. |
#9
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Is a burglar alarm box a junction box?
.. Doesn't X-10 all depend on radio transmissions. X-10 sends its signals over the power wires. There is a "new" system (the same folks that sell X-10 will also sell the new stuff) that uses RF. I'm going to use that to flash the porch light when the alarm goes off, but that's not critical. If at all possible, I like to use hard-wired things. Well, if the transmitter and receiver are on the same 120 volt circuit, it's pretty reliable. 2b) A transformer/relay "package" that is approved and has isolated high and low voltage sides. The "high voltage" wiring would come out in an attached J-box. The "low voltage" stuff would be screw terminals. I have seen this but would not know where to get my hand on it. Well, what it has now, the professional quality alarm (used by a friend with an alarm business and over 1000 customers) comes with its own big wall wart, 16.5 volts. The 110 has to be the same phase as what supplies those light bulbs at other times, through their respective switches, because if the light is already on when I arm the alarm, I have to have the same phase 110 going to the lightbulb through both sources. I'm sure even one reading already knows that. I guess I could use a big, 250 or more watt isolation transformer. I think it would be expensive to buy and it would have to run all the time, just for those 2 minutes when I leave the house or return. Whereas, what I had in mind wouldn't cost any additional money for installation or running. |
#10
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Is a burglar alarm box a junction box?
On Thu, 11 Jan 2007 22:00:24 -0500, "John Gilmer"
wrote: Doesn't X-10 all depend on radio transmissions. X-10 sends its signals over the power wires. There is a "new" system (the same folks that sell X-10 will also sell the new stuff) that uses RF. I'm going to use that to flash the porch light when the alarm goes off, but that's not critical. If at all possible, I like to use hard-wired things. Well, if the transmitter and receiver are on the same 120 volt circuit, it's pretty reliable. Come to think of it, turning the hall light on is not critical either! |
#11
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Is a burglar alarm box a junction box?
[snip] 2a) One example might be the X-10 gadget that plugs into the wall for the "high voltage" side and has some screw terminals for the "low voltage" side. These have options including send "ON" when an external contact closes and "OFF" when the external contact opens. Other X-10 devices would switch the lamp load. This is the quick and dirty "off the shelf" approach. Doesn't X-10 all depend on radio transmissions. No. Most doesn't. I'm going to use that to flash the porch light when the alarm goes off, but that's not critical. If at all possible, I like to use hard-wired things. X10 is a power line carrier system, where the signals are modulated on 121KHz bursts that are sent along the power line during zero-crossing. This is an old, slow protocol with little error correction. There are related devices that transmit through the air, but normally X10 does not. Because of the powerline dependence, you will not be able to use X10 across power transformers, and may have problems controlling devices on the other AC phase. -- Mark Lloyd http://notstupid.laughingsquid.com "Properly read, the Bible is the most potent force for atheism ever conceived." -- Isaac Asimov |
#13
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Is a burglar alarm box a junction box?
"Ashton Crusher" wrote in message ... The installations I've seen of burglar alarms, fire alarms, pbx and computer network boxes have all been set up with the electric completely separate. Typically the electric is run in and terminated with regular three prong 120 volt outlets. Then the alarm installers (and other system installers) nail a hunk of plywood to the wall, hang all their stuff on that, and plug it in to the 120 volt outlet just like you'd plug in a toaster. That's how we do it. _Years_ ago (decades, actually), alarms were wired with 120v directly into the back of the box, either hard-wired or plug-in. I prefer the current way of doing it - with a 16.5v transformer! |
#14
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Is a burglar alarm box a junction box?
On Fri, 12 Jan 2007 18:21:58 -0700, "Bob M." wrote:
"Ashton Crusher" wrote in message .. . The installations I've seen of burglar alarms, fire alarms, pbx and computer network boxes have all been set up with the electric completely separate. Typically the electric is run in and terminated with regular three prong 120 volt outlets. Then the alarm installers (and other system installers) nail a hunk of plywood to the wall, hang all their stuff on that, and plug it in to the 120 volt outlet just like you'd plug in a toaster. That's how we do it. _Years_ ago (decades, actually), alarms were wired with 120v directly into the back of the box, either hard-wired or plug-in. I prefer the current way of doing it - with a 16.5v transformer! But how does this all relate to using the burglar alarm keypad to turn on the hall and dining room lights, when I leave and return? |
#15
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Is a burglar alarm box a junction box?
When I tried it, the capacitor would not work at all. The coupler would, but only if it was an ACTIVE coupler (amplifies the X10 signal). There were still a significant number of annoying intermittent problems. A hardwired system would be a lot more reliable, or at least wireless using some more modern protocol. That's my experience. The "Passive" couplers just don't work very well. The "active" couplers sometimes work and sometimes don't. X-10 could/can be very reliable if one creates an isolated wiring section. For example, one can get a filter that blocks X-10 signals from passing. Stuff on either side of the filter can communicate with stuff on the same side but "other side" stuff can't communicate or interfere. In the OP problem, the solution is a "relay transformer" package. It allows low voltage control of a high power load. |
#16
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Is a burglar alarm box a junction box?
On Sat, 13 Jan 2007 04:49:01 -0500, "John Gilmer"
wrote: When I tried it, the capacitor would not work at all. The coupler would, but only if it was an ACTIVE coupler (amplifies the X10 signal). There were still a significant number of annoying intermittent problems. A hardwired system would be a lot more reliable, or at least wireless using some more modern protocol. That's my experience. The "Passive" couplers just don't work very well. The "active" couplers sometimes work and sometimes don't. X-10 could/can be very reliable if one creates an isolated wiring section. For example, one can get a filter that blocks X-10 signals from passing. Stuff on either side of the filter can communicate with stuff on the same side but "other side" stuff can't communicate or interfere. In the OP problem, the solution is a "relay transformer" package. It allows low voltage control of a high power load. Do you have any pictures of those? -- Mark Lloyd http://notstupid.laughingsquid.com "Properly read, the Bible is the most potent force for atheism ever conceived." -- Isaac Asimov |
#17
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Is a burglar alarm box a junction box?
In the OP problem, the solution is a "relay transformer" package. It allows low voltage control of a high power load. Do you have any pictures of those? Google "relay transformer" I have a slow connection but it looks like there is plenty of stuff available. |
#18
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Is a burglar alarm box a junction box?
On Sat, 13 Jan 2007 00:13:46 -0500, mm
wrote: On Fri, 12 Jan 2007 18:21:58 -0700, "Bob M." wrote: "Ashton Crusher" wrote in message . .. The installations I've seen of burglar alarms, fire alarms, pbx and computer network boxes have all been set up with the electric completely separate. Typically the electric is run in and terminated with regular three prong 120 volt outlets. Then the alarm installers (and other system installers) nail a hunk of plywood to the wall, hang all their stuff on that, and plug it in to the 120 volt outlet just like you'd plug in a toaster. That's how we do it. _Years_ ago (decades, actually), alarms were wired with 120v directly into the back of the box, either hard-wired or plug-in. I prefer the current way of doing it - with a 16.5v transformer! But how does this all relate to using the burglar alarm keypad to turn on the hall and dining room lights, when I leave and return? It seems likely that your burglar alarm should have an "output" set up to control a relay. Just like it has an internal output that turns the red light on to tell you it's armed. Assuming it has such an output you would use that to control a relay in parallel to the hall and dining room light switches. Alarm on = relay on = lights on. -- Elbridge Gerry, of Massachusetts: "What, sir, is the use of militia? It is to prevent the establishment of a standing army, the bane of liberty. . . Whenever Government means to invade the rights and liberties of the people, they always attempt to destroy the militia, in order to raise a standing army upon its ruins." -- Debate, U.S. House of Representatives, August 17, 1789 |
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