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#162
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Load capacity of 200-amp panel
On Sat, 25 Jun 2016 20:34:16 -0700, "Tony944" wrote:
That would be incorrect it could have 208, 220, 240, or 270 it all depend on costumer setup, in most cases through out heavy industries 270 is standard but for Homers use it floats 208-240. Some chip organization may use one leg of 480 for 240 & Neutral. when you work with industrial people do not take anything for granted! Typical 480v 3p will be wye connected and the line to neutral will be 277 (close to that 270 you posted). That is very common in office buildings for lighting loads. 480 delta is as likely to be ungrounded or impedance grounded as any other configuration. That will be a very special installation, like a glass plant or some other place where a ground fault shutdown would be disastrous. The first fault is free ;-) It requires special ground fault monitor devices to be sure it stays ungrounded. If you wanted 240 line to neutral you would need center tapped 480, which I have never heard of or corner grounded 240 delta. That will look exactly like a single phase installation to the uneducated eye. (2 hots and a grounded neutral but it is 3 phase). I see that in sewer lift pumps where there is not really any line to neutral loads and they can use cheaper switch gear since there are only 2 ungrounded legs to protect. |
#163
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Load capacity of 200-amp panel
On Thursday, October 22, 2009 at 12:02:51 PM UTC-4, JayB wrote:
This came up elsewhere and I am just curious about what the answer is. If someone has a main service panel with a 200-amp main breaker, how many amps of service can that panel actually service? I am probably not wording this correctly, but I thought that I remember something about a 200-amp main breaker actually being okay for 400 amps of service since there are two separate circuits coming in (a 240-volt service split into two 120-volt circuits in the panel box). __________________________________________________ _________________________ I own a tanning salon and want to add couple more beds.. however I only have a 200 amp service. We currently have 5 tanning beds, all are running on 240v, when we checked with all the beds on the amp draw at the main was 196 amps. When I then turned our towels dryer on the amp draw was 216 amps, but it did not trip the breaker. In addition we have all the other lights and central air and curling irons turning on and off etc etc. So how far past the 200 amps can I go before it will trip? The tanning beds only run for 20 mins.. so even if all the beds are on at the same time they never are all on for longer the 20 mins at a time so being past the 200 amps is only consistant for 20 mins. So could someone please give me an idea how far past the 200 amps I can go so I know if I can add another bed or 2? Thanks! |
#164
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Load capacity of 200-amp panel
wrote in message ... So the question was never answered. What do you call a panel with a dual main breaker 200/200. Is that called a 200 Amp service or a 400 Amp service? M When you say dual breaker do you mean dual pole are two separate breaker (Confusing isn't) If your Breaker is dual pole 200 amp. (Breakers do come in single, double, triple and 4 poles) If you are home owner and you are going to use only 120 volts it is 400 amp. service If you are going to use only 220/240 then it is 200 amp service |
#165
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Load capacity of 200-amp panel
wrote in message ... On Thursday, October 22, 2009 at 12:02:51 PM UTC-4, JayB wrote: This came up elsewhere and I am just curious about what the answer is. If someone has a main service panel with a 200-amp main breaker, how many amps of service can that panel actually service? I am probably not wording this correctly, but I thought that I remember something about a 200-amp main breaker actually being okay for 400 amps of service since there are two separate circuits coming in (a 240-volt service split into two 120-volt circuits in the panel box). __________________________________________________ _________________________ I own a tanning salon and want to add couple more beds.. however I only have a 200 amp service. We currently have 5 tanning beds, all are running on 240v, when we checked with all the beds on the amp draw at the main was 196 amps. When I then turned our towels dryer on the amp draw was 216 amps, but it did not trip the breaker. In addition we have all the other lights and central air and curling irons turning on and off etc etc. So how far past the 200 amps can I go before it will trip? The tanning beds only run for 20 mins.. so even if all the beds are on at the same time they never are all on for longer the 20 mins at a time so being past the 200 amps is only consistant for 20 mins. So could someone please give me an idea how far past the 200 amps I can go so I know if I can add another bed or 2? Thanks! What you asking it is not simple answer. The circuit Breakers are not instantaneous they act as time delay it takes few minutes to warm-up before it will drop out. However I would not advise you to run even 196 amps. for longer time connection and wire could fined small amount of resistance that could cause the fire, Good luck |
#166
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Load capacity of 200-amp panel
On Sunday, June 26, 2016 at 2:23:10 PM UTC-4, Tony944 wrote:
wrote in message ... On Thursday, October 22, 2009 at 12:02:51 PM UTC-4, JayB wrote: This came up elsewhere and I am just curious about what the answer is. If someone has a main service panel with a 200-amp main breaker, how many amps of service can that panel actually service? I am probably not wording this correctly, but I thought that I remember something about a 200-amp main breaker actually being okay for 400 amps of service since there are two separate circuits coming in (a 240-volt service split into two 120-volt circuits in the panel box). __________________________________________________ _________________________ I own a tanning salon and want to add couple more beds.. however I only have a 200 amp service. We currently have 5 tanning beds, all are running on 240v, when we checked with all the beds on the amp draw at the main was 196 amps. When I then turned our towels dryer on the amp draw was 216 amps, but it did not trip the breaker. In addition we have all the other lights and central air and curling irons turning on and off etc etc. So how far past the 200 amps can I go before it will trip? The tanning beds only run for 20 mins.. so even if all the beds are on at the same time they never are all on for longer the 20 mins at a time so being past the 200 amps is only consistant for 20 mins. So could someone please give me an idea how far past the 200 amps I can go so I know if I can add another bed or 2? Thanks! What you asking it is not simple answer. The circuit Breakers are not instantaneous they act as time delay it takes few minutes to warm-up before it will drop out. However I would not advise you to run even 196 amps. for longer time connection and wire could fined small amount of resistance that could cause the fire, Good luck -------------------------------------------------------------- As I pointed out.. the tanning beds operate for no longer then 20 mins. So that would be the maximum time spent above the 200 amp line. But I still would like a better answer as to how far past I can go before I start tripping the main. In earlier posts I read that only after a sustained amp draw of 3 hours would it trip. If this is true then I shouldnt be anywhere close to having a problem if I am only doing 20 mins then a break then 20 mins etc. So could I go to 250 amps? or more? I understand what I am asking is pushing the rules, but would like a reasonable idea of how far past I can go. I want to purchase one more bed and if that puts me at 210-220 amps for 20 mins at a time, just want to know that I can do that without tripping my main etc. Thoughts? |
#167
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Load capacity of 200-amp panel
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#168
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Load capacity of 200-amp panel
On Sat, 25 Jun 2016 20:42:49 -0700 (PDT)
trader_4 wrote: You ****ing moron, you're the drivel. Very socialist/liberal/democrat of you. You sling but can not handle return fire. |
#169
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Load capacity of 200-amp panel
On 6/25/2016 3:18 PM, Tony944 wrote:
"trader_4" wrote in message ... On Saturday, June 25, 2016 at 1:50:11 PM UTC-4, Tony944 wrote: "trader_4" wrote in message ... On Friday, June 24, 2016 at 7:41:07 PM UTC-4, wrote: On Thursday, October 22, 2009 at 11:02:51 AM UTC-5, JayB wrote: This came up elsewhere and I am just curious about what the answer is. If someone has a main service panel with a 200-amp main breaker, how many amps of service can that panel actually service? I am probably not wording this correctly, but I thought that I remember something about a 200-amp main breaker actually being okay for 400 amps of service since there are two separate circuits coming in (a 240-volt service split into two 120-volt circuits in the panel box). DON'T DO IT! Don't do what? A 200 amp panel will support 240V at 200 amps or 400 amps at 120V. 200 amps. is 200 if is 120 or 240, You can not change Amperage Voltage yes Amperage "NO" for 240 Volt max. is 200 amps./leg Each "leg" of 120 Volt, will give max. 200 amps. assuming that neutral is rated for 400 amps. Sigh. Do we have to go through this all over again? A service rated at 240V, 200A will support a load of 240V, 200A or a balanced load of 120V, 400A. Yes the current in the service conductors never exceeds 200A, but if you have 200A flowing through one leg through 200A of 120V loads, through another 200A of 120V loads, and then back out the other leg, it's handling 400A of 120V loads. Dear Sir you look at it your way and I will look at it my way. have nice day This is true. 15 years ago, a so-called "scientist" with a radio show and a doctorate degree, was advocating for the local utility to manage power shortages by installing a device on power poles that connected all the 120V loads, in both legs, together, which would turn off all the 240V loads (A/C, pool pumps, dryers, stoves, ovens, etc.). One 120V leg would power all the 120V outlets. As one person pointed out, that would cause a lot of old houses to burn down since the neutral in older houses was not designed to carry these loads, since builders saved money by using smaller neutral conductors. With a balanced load in each leg, there is relatively little current flowing in the neutral. Newer houses have a neutral that can handle the "maximum unbalanced load." "Scientists tinkering with electric switches at Lawrence Livermore National Laboratory may have found a way to prevent blackouts across California. Researchers at the lab in the past week have successfully tested a simple electric switching device that could be placed on thousands of power poles around the state, shutting off partial power to homes and businesses during Stage 3 alerts in hot summer months, while keeping some lights on." Fortunately, PG&E was not foolish enough to take these "scientists" seriously. |
#171
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Load capacity of 200-amp panel
On Sunday, June 26, 2016 at 4:34:01 PM UTC-4, Ralph Mowery wrote:
In article , says... As I pointed out.. the tanning beds operate for no longer then 20 mins. So that would be the maximum time spent above the 200 amp line. But I still would like a better answer as to how far past I can go before I start tripping the main. In earlier posts I read that only after a sustained amp draw of 3 hours would it trip. If this is true then I shouldnt be anywhere close to having a problem if I am only doing 20 mins then a break then 20 mins etc. So could I go to 250 amps? or more? I understand what I am asking is pushing the rules, but would like a reasonable idea of how far past I can go. I want to purchase one more bed and if that puts me at 210-220 amps for 20 mins at a time, just want to know that I can do that without tripping my main etc. Thoughts? Forget about trying to push the limiits of the breaker. If you already have a load of close to 200 amps, either forget the other bed or upgrade the service. You are not only pushing the limits of the breaker and may weaken it to where it will trip at a lower current at a later time, you are chancing over heating the wires feeding the breaker. Looking at some typical tripping curves it could take from 1000 to 10,000 seconds if overloadded to about 120%. The more the overload, the faster the tripping. It is also the ammount of heat build up. If the box is cold as in the winter time, the times will be longer and if hot as in the middle of summer, the times will be shorter. +1 to all that. The OP is right at 200A with the existing 5 beds. The dryer makes it 216A. Five beds, 200A, the beds are 40A each, so how can they add a couple of new beds? Even one puts it at 240A/256A. And in line with what you're saying about warming up, once tripped, if it's reset, it's going to trip faster the next time. Doesn't sound good with a business with 6 customers. Side note, I'm having a hard time figuring out where all this power is going. That's 10KW for one bed. I've never been in one, but I thought they put out UV, not a lot of heat. 10KW sounds like enough power to start cooking you, similar power to a home oven. |
#172
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Load capacity of 200-amp panel
On Sunday, June 26, 2016 at 2:12:55 PM UTC-4, Tony944 wrote:
wrote in message ... So the question was never answered. What do you call a panel with a dual main breaker 200/200. Is that called a 200 Amp service or a 400 Amp service? M When you say dual breaker do you mean dual pole are two separate breaker (Confusing isn't) If your Breaker is dual pole 200 amp. (Breakers do come in single, double, triple and 4 poles) If you are home owner and you are going to use only 120 volts it is 400 amp. service If you are going to use only 220/240 then it is 200 amp service So, if you needed capacity for 400A of 120V loads in a facility, you'd call up the power company and request a 400A service? Buy a 400A panel? In my world that's still a 200A service from the power company, using a cable that supports 200A, using a 200A panel. There is never more than 200A flowing into the facility. |
#173
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Load capacity of 200-amp panel
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#174
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Load capacity of 200-amp panel
On Sunday, June 26, 2016 at 2:23:10 PM UTC-4, Tony944 wrote:
wrote in message ... On Thursday, October 22, 2009 at 12:02:51 PM UTC-4, JayB wrote: This came up elsewhere and I am just curious about what the answer is. If someone has a main service panel with a 200-amp main breaker, how many amps of service can that panel actually service? I am probably not wording this correctly, but I thought that I remember something about a 200-amp main breaker actually being okay for 400 amps of service since there are two separate circuits coming in (a 240-volt service split into two 120-volt circuits in the panel box). __________________________________________________ _________________________ I own a tanning salon and want to add couple more beds.. however I only have a 200 amp service. We currently have 5 tanning beds, all are running on 240v, when we checked with all the beds on the amp draw at the main was 196 amps. When I then turned our towels dryer on the amp draw was 216 amps, but it did not trip the breaker. In addition we have all the other lights and central air and curling irons turning on and off etc etc. So how far past the 200 amps can I go before it will trip? The tanning beds only run for 20 mins.. so even if all the beds are on at the same time they never are all on for longer the 20 mins at a time so being past the 200 amps is only consistant for 20 mins. So could someone please give me an idea how far past the 200 amps I can go so I know if I can add another bed or 2? Thanks! What you asking it is not simple answer. The circuit Breakers are not instantaneous they act as time delay it takes few minutes to warm-up before it will drop out. However I would not advise you to run even 196 amps. for longer time connection and wire could fined small amount of resistance that could cause the fire, Good luck Wire properly sized presents no risk, so IDK what the alleged problem with wire heating is when the draw is within the 200A rating, there is considerable margin. And resistance is resistance, so a bad connection with resistance X is going to create the same heat with 196A flowing through it on a 400A service as it will on a 200A. |
#175
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Load capacity of 200-amp panel
On Thursday, October 22, 2009 at 9:02:51 AM UTC-7, JayB wrote:
This came up elsewhere and I am just curious about what the answer is. If someone has a main service panel with a 200-amp main breaker, how many amps of service can that panel actually service? I am probably not wording this correctly, but I thought that I remember something about a 200-amp main breaker actually being okay for 400 amps of service since there are two separate circuits coming in (a 240-volt service split into two 120-volt circuits in the panel box). If you apply 240-Volt to the load and have 200 Amps current, you've got 48 KVA. If you apply 120-volt and have a 200 amps, you've got 24 KVA. If you connect 200 Amps load to each of 120-volt leg, you've got 48 KVA total. |
#176
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Load capacity of 200-amp panel
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#177
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Load capacity of 200-amp panel
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#178
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Load capacity of 200-amp panel
On 10/31/2016 03:35 PM, wrote:
On Thursday, October 22, 2009 at 9:02:51 AM UTC-7, JayB wrote: This came up elsewhere and I am just curious about what the answer is. If someone has a main service panel with a 200-amp main breaker, how many amps of service can that panel actually service? I am probably not wording this correctly, but I thought that I remember something about a 200-amp main breaker actually being okay for 400 amps of service since there are two separate circuits coming in (a 240-volt service split into two 120-volt circuits in the panel box). If you apply 240-Volt to the load and have 200 Amps current, you've got 48 KVA. If you apply 120-volt and have a 200 amps, you've got 24 KVA. If you connect 200 Amps load to each of 120-volt leg, you've got 48 KVA total. And no 400A anywhere. -- 55 days until the winter celebration (Sunday December 25, 2016 12:00:00 AM for 1 day). Mark Lloyd http://notstupid.us/ "No gown worse becomes a woman than the desire to be wise." [Martin Luther] |
#179
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Load capacity of 200-amp panel
On Mon, 31 Oct 2016 20:14:58 -0400, Ed Pawlowski wrote:
On 10/31/2016 8:00 PM, wrote: If you run only 240 volt loads, you can only run 200 amps Technically, yes, but 80% max is recommended That is just a guideline for some individual loads and a rule for others. When you do the load calc for the whole service, you can install based on 100% of the result if you are being cheap. The NEC is not a design manual, it is just a minimum standard. |
#181
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Load capacity of 200-amp panel
On Monday, October 31, 2016 at 8:00:09 PM UTC-4, wrote:
On Mon, 31 Oct 2016 13:35:20 -0700 (PDT), wrote: On Thursday, October 22, 2009 at 9:02:51 AM UTC-7, JayB wrote: This came up elsewhere and I am just curious about what the answer is. If someone has a main service panel with a 200-amp main breaker, how many amps of service can that panel actually service? I am probably not wording this correctly, but I thought that I remember something about a 200-amp main breaker actually being okay for 400 amps of service since there are two separate circuits coming in (a 240-volt service split into two 120-volt circuits in the panel box). If you apply 240-Volt to the load and have 200 Amps current, you've got 48 KVA. If you apply 120-volt and have a 200 amps, you've got 24 KVA. If you connect 200 Amps load to each of 120-volt leg, you've got 48 KVA total. In other words, if you balance the load and use only 120 volt loads, you can run a maximum of 400 amps. If you run only 240 volt loads, you can only run 200 amps In reality there is never more than 200 amps of current flowing in a 200A service. If it's a balanced load, the same 200A is flowing through half the 120V loads, then on through the other half of the 120V loads. There is never more than 200A flowing in the service conductors. You can support 400A worth of 120V loads, but it's just 200A being counted twice. |
#182
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Load capacity of 200-amp panel
On Wed, 02 Nov 2016 16:05:10 -0500, wrote:
On Mon, 31 Oct 2016 20:00:11 -0400, wrote: In other words, if you balance the load and use only 120 volt loads, you can run a maximum of 400 amps. If you run only 240 volt loads, you can only run 200 amps And oftentimes the pole transformer is not capable of 48KVA. Most of them have their KVA rating painted right on the exterior of them. (You may need binoculars to read it from the ground). And dont forget that they often supply power to other homes and/or buildings as well. Transformers supplying multiple homes MAY not be capable of supplying the full load of all the houses at once. Any single residence transformer WILL be sized to handle the full load - at least in Ontario. I was unable to install a 200 amp sewrvice in my home because the transformer feed/undeground cable was lot large enough. I was limitted to 125 amps. |
#183
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Load capacity of 200-amp panel
On Wed, 02 Nov 2016 19:06:38 -0400, wrote:
On Wed, 02 Nov 2016 16:05:10 -0500, wrote: On Mon, 31 Oct 2016 20:00:11 -0400, wrote: In other words, if you balance the load and use only 120 volt loads, you can run a maximum of 400 amps. If you run only 240 volt loads, you can only run 200 amps And oftentimes the pole transformer is not capable of 48KVA. Most of them have their KVA rating painted right on the exterior of them. (You may need binoculars to read it from the ground). And dont forget that they often supply power to other homes and/or buildings as well. Transformers supplying multiple homes MAY not be capable of supplying the full load of all the houses at once. Any single residence transformer WILL be sized to handle the full load - at least in Ontario. I was unable to install a 200 amp sewrvice in my home because the transformer feed/undeground cable was lot large enough. I was limitted to 125 amps. That is certainly not true in the US. They will feed 3 houses from a 50 KVA unit and assume it will handle spikes above the 50 KVA. My house os one of 3 on a 37 KVA unit. The guys told me, they will replace it with a 50 when we burn it up. These houses have 200a panels but they are fed with 2ga 1350 alloy aluminum overhead service conductors. Voltage drop has not been a problem here for me. I still get 124 or so |
#184
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Load capacity of 200-amp panel
Good info Terry
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#185
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Load capacity of 200-amp panel
Okay I own a tanning salon. I currently have a 200amp box. All the beds run on 230. Is it ever possible in any way to run 225 amps of beds at the same time? Can I put a bigger main breaker box for example? I just need a smidge more amps and cant really afford or justify changing the entire service over 20-25 more amps. At most I would only be at that 225 max amp draw for 15 mins at a time etc. Current Bed configuration: Bed #1 = 20amp draw Bed #2 = 20amp draw Bed #3 = 55amp draw Bed #4 = 55amp draw Bed #5 = 20amp draw Bed #6 = 20amp draw ----------------------------- Current total amp draw from beds = 190 amp draw Everything works fine with this configuration but I want to REMOVE a 20amp draw bed and replace it with a 55amp draw bed, which will make the new amp draw 225amps at any point where all 6 beds happen to be turned on at the same time. Just find it hard to believe that my only option would be to have the city re run a total new service over 25 amps. Can this be done and if so can it be done safely? |
#186
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Load capacity of 200-amp panel
On Sunday, January 29, 2017 at 10:23:53 AM UTC-5, wrote:
Okay I own a tanning salon. I currently have a 200amp box. All the beds run on 230. Is it ever possible in any way to run 225 amps of beds at the same time? Can I put a bigger main breaker box for example? I just need a smidge more amps and cant really afford or justify changing the entire service over 20-25 more amps. At most I would only be at that 225 max amp draw for 15 mins at a time etc. Current Bed configuration: Bed #1 = 20amp draw Bed #2 = 20amp draw Bed #3 = 55amp draw Bed #4 = 55amp draw Bed #5 = 20amp draw Bed #6 = 20amp draw ----------------------------- Current total amp draw from beds = 190 amp draw Everything works fine with this configuration but I want to REMOVE a 20amp draw bed and replace it with a 55amp draw bed, which will make the new amp draw 225amps at any point where all 6 beds happen to be turned on at the same time. Just find it hard to believe that my only option would be to have the city re run a total new service over 25 amps. Can this be done and if so can it be done safely? You can't put 5 1/2 gallons of crap into a 5 gallon pail. Why is it so hard to believe that when you've reached the service capacity limit, you've reached the limit? You need a bigger main breaker, probably a new panel too, unless it's rated for over 200A, and a utility service that's greater than 200A, whatever your choice is for how much larger you want to go. However, are you sure you're really pulling what you posted? IDK where those draws you posted came from. Are they measured or from the eqpt labels? If it's labels, it's possible the actual draw is somewhat less, as the label would be worst case, startup, etc. If so, you might squeak by with the current 200A service, assuming all the beds don't turn on at the same time, hit their peak reqt number at the same time, etc. You could measure what is actually being used and see. |
#187
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Load capacity of 200-amp panel
All the amp draws are being taken directly from the breaker in the breaker box as the bed is running.
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#188
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Load capacity of 200-amp panel
On Sunday, January 29, 2017 at 10:58:34 AM UTC-5, wrote:
All the amp draws are being taken directly from the breaker in the breaker box as the bed is running. For example I have a ladder that says MAXIMUM weight capacity is 275lbs. I weigh 300lb and can stand on it without it breaking. So wasnt sure if the 200 amp load capacity was similar in the fact that they recommend not going over but if you did a little wouldnt be end of world. |
#189
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Load capacity of 200-amp panel
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#190
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Load capacity of 200-amp panel
On Sunday, January 29, 2017 at 10:58:34 AM UTC-5, wrote:
All the amp draws are being taken directly from the breaker in the breaker box as the bed is running. Well then, if you want to run all that plus the new bed at the same time, you need a service, a panel, a main breaker that are over 200A, with 300A likely being the next available choice. |
#191
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Load capacity of 200-amp panel
On Sunday, January 29, 2017 at 11:04:01 AM UTC-5, wrote:
On Sunday, January 29, 2017 at 10:58:34 AM UTC-5, wrote: All the amp draws are being taken directly from the breaker in the breaker box as the bed is running. For example I have a ladder that says MAXIMUM weight capacity is 275lbs. I weigh 300lb and can stand on it without it breaking. So wasnt sure if the 200 amp load capacity was similar in the fact that they recommend not going over but if you did a little wouldnt be end of world. There are curves that show how long it takes for a given breaker to trip versus the excess current going through it. A large overload, eg a direct short, a typical breaker trips in milliseconds. If you only overload it by 10% it will take much longer, probably many minutes, but it still will trip. In short, when it comes to this, you really can't put more than 5 gallons of crap in a 5 gallon bucket, at least not continuously. |
#192
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Load capacity of 200-amp panel
On 01/29/2017 11:31 AM, Ed Pawlowski wrote:
I find it a bit surprising that people still expose themselves to potential side affects from tanning. Do you refer the customers to a cancer doctor for their melanoma? I believe the whole "sun exposure causes melanoma" is junk science and that skin cancer is actually caused by eating refined carbohydrate junk foods. FWIW, I find it a bit surprising that people still expose themselves to potential side affects from eating wheat and sugar. |
#193
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Load capacity of 200-amp panel
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#194
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Load capacity of 200-amp panel
On 1/29/2017 12:40 PM, joe wrote:
On 01/29/2017 11:31 AM, Ed Pawlowski wrote: I find it a bit surprising that people still expose themselves to potential side affects from tanning. Do you refer the customers to a cancer doctor for their melanoma? I believe the whole "sun exposure causes melanoma" is junk science and that skin cancer is actually caused by eating refined carbohydrate junk foods. FWIW, I find it a bit surprising that people still expose themselves to potential side affects from eating wheat and sugar. Well thank for letting us know. If the doctor has any questions I'll just have him contact Joe on the internet for the facts. |
#195
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Load capacity of 200-amp panel
On Sunday, January 29, 2017 at 12:57:02 PM UTC-5, Ralph Mowery wrote:
In article , says... On Sunday, January 29, 2017 at 11:04:01 AM UTC-5, wrote: On Sunday, January 29, 2017 at 10:58:34 AM UTC-5, wrote: All the amp draws are being taken directly from the breaker in the breaker box as the bed is running. For example I have a ladder that says MAXIMUM weight capacity is 275lbs. I weigh 300lb and can stand on it without it breaking. So wasnt sure if the 200 amp load capacity was similar in the fact that they recommend not going over but if you did a little wouldnt be end of world. There are curves that show how long it takes for a given breaker to trip versus the excess current going through it. A large overload, eg a direct short, a typical breaker trips in milliseconds. If you only overload it by 10% it will take much longer, probably many minutes, but it still will trip. In short, when it comes to this, you really can't put more than 5 gallons of crap in a 5 gallon bucket, at least not continuously. Safety factors work both ways. If a ladder is designed to have a working load of 275, it probably will hold a lot more with out breaking. That is the safety factor. It sort of factors in that all materials may not hold up the same load. If the ladder is made of wood, the wood can vary in strength by many factors, so you rate the load for the minimum usual strength. The breakers and wiring are rated in reverse. The wires can handle lots more current,but to be safe they are rated at a lower capacity. Good point. It is the reverse. Breakers so not trip at execrtally the marked value as pointed out. The 200 amp breaker may carry 201 amps for many hours and never trip, or it may trip at 295 amps after a week. From the typical curves I've seen, a 200A breaker will trip in minutes or less at 295. |
#196
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Load capacity of 200-amp panel
On 1/29/2017 1:43 PM, trader_4 wrote:
Breakers so not trip at execrtally the marked value as pointed out. The 200 amp breaker may carry 201 amps for many hours and never trip, or it may trip at 295 amps after a week. From the typical curves I've seen, a 200A breaker will trip in minutes or less at 295. I'm thinking that was a typo and should have been 205. |
#197
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Load capacity of 200-amp panel
On Sun, 29 Jan 2017 10:43:11 -0800 (PST), trader_4
wrote: Breakers so not trip at execrtally the marked value as pointed out. The 200 amp breaker may carry 201 amps for many hours and never trip, or it may trip at 295 amps after a week. From the typical curves I've seen, a 200A breaker will trip in minutes or less at 295. Just a little real world. I was just working on an air handler that was tripping a 25a breaker after a minute. The combined motor and 10kw heat strip load was 44.5a with the 10k kicking in about 20 seconds after the motor started. The wiring was right but the moron installing the unit swapped the condenser and air handler breakers (60 and 25) |
#198
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Load capacity of 200-amp panel
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#199
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Load capacity of 200-amp panel
On 1/29/2017 1:25 PM, Ed Pawlowski wrote:
On 1/29/2017 12:40 PM, joe wrote: On 01/29/2017 11:31 AM, Ed Pawlowski wrote: I find it a bit surprising that people still expose themselves to potential side affects from tanning. Do you refer the customers to a cancer doctor for their melanoma? I believe the whole "sun exposure causes melanoma" is junk science and that skin cancer is actually caused by eating refined carbohydrate junk foods. FWIW, I find it a bit surprising that people still expose themselves to potential side affects from eating wheat and sugar. Well thank for letting us know. If the doctor has any questions I'll just have him contact Joe on the internet for the facts. Correlation is not causation but remote tribes of people who don't eat the standard American diet and live out in the sun are the healthiest people on the planet. And while you're at it, have your pharmaceutical-pushin doctor read this: http://www.theiflife.com/the-inuit-p...se-and-cancer/ |
#200
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Load capacity of 200-amp panel
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