Dwelling 24 Volts

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I can't find a violation.
I thought once there was a statement that stated the code didn't care about less than 50 volts. :?
110.4 requires equipment not be rated less than the voltage connected to it.
 
Dennis Alwon said:
Is it compliant to wire a dwelling with 24 volts?
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like a door bell? or a thermostat?

I don't think the code requires any specific level of voltage although I think you are limited to 250V max.

Many localities require utility service even if it is not used so if they are trying to get around having utility service they may find they can't.
 
If NEC is the standard to comply with, all the outlets required by 210.52 are "125-volt, 15- and 20-ampere receptacle outlets".

210.63 is also 125 volt outlet when required.
 
petersonra said:
good point. however does it say they actually have to be energized?
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Yes there are a few places that require 125V outlets as in a washing machine.

Let me be more direct--How do you think art. 710 affects the requirements in art. 210? Chapters 1-4 can be overridden by chapters 5-8
 
Then I would say it's compliant in the sense that it isn't non-compliant.

Biggest issue is that it takes five times the current to deliver the same power.
 
Dennis Alwon said:
Yes there are a few places that require 125V outlets as in a washing machine.

Let me be more direct--How do you think art. 710 affects the requirements in art. 210? Chapters 1-4 can be overridden by chapters 5-8
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And one every 6/12 feet in majority of the rooms or 2/4 feet for kitchen counters as the general base - plus the rest of 210.52.
 
Dennis Alwon said:
Yes there are a few places that require 125V outlets as in a washing machine.

Let me be more direct--How do you think art. 710 affects the requirements in art. 210? Chapters 1-4 can be overridden by chapters 5-8
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If this is an off grid application I guess 710 applies. But 720 would also apply. 710.15(A) seems to imply that you would need to have standard 220 load calcs for the loads but not the source. And I see no mention of relief in 720 from 220 calcs either. Both of these Articles are as clear as mud to me.
 
LarryFine said:
Then I would say it's compliant in the sense that it isn't non-compliant.

Biggest issue is that it takes five times the current to deliver the same power.
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Heh, there is no article 710 in the 2008 NEC. Looks legal by article 720, I don't know why you wouldn't go 48 volt save for that apparently 14 gauge wire is not legal in an article 720 installation.

NEC quirks & legalities notwithstanding, why in the world would you want to wire a house 24 volt??? Isn't that like kind of Reinventing the wheel with a smaller wheel?
 
So the question was asked in reference to a small cabin. It just seems like it can't be legit to me. The NEC makes such a big deal about wiring for all possibilities (spacing of receptacles, etc) that the 24v seems to negate it all.

I understand 710 coming into play but I just don't see how art. 210 can be basically ignored. If the stand alone system is 120v then I would have no issue but it just doesn't seem right to me
 
Dennis Alwon said:
So the question was asked in reference to a small cabin. It just seems like it can't be legit to me. The NEC makes such a big deal about wiring for all possibilities (spacing of receptacles, etc) that the 24v seems to negate it all.

I understand 710 coming into play but I just don't see how art. 210 can be basically ignored. If the stand alone system is 120v then I would have no issue but it just doesn't seem right to me
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there are some places that have made some changes to their building codes to accommodate people that want to live off grid. usually in very rural areas. also there are still some rural areas that have no requirement to follow the NEC or any other electrical code at all.

But if the question is whether it can be done and still meet the requirements of the NEC, it would appear the answer is no, although there appears to be no requirement that the 120V receptacles ever be energized or used.
 
Dennis Alwon said:
So the question was asked in reference to a small cabin. It just seems like it can't be legit to me. The NEC makes such a big deal about wiring for all possibilities (spacing of receptacles, etc) that the 24v seems to negate it all.

I understand 710 coming into play but I just don't see how art. 210 can be basically ignored. If the stand alone system is 120v then I would have no issue but it just doesn't seem right to me
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Is the cabin in an area where the NEC has been adopted as law?

Another question, if the cabin has no electric power at all, does it have to have required outlets? I have seen more than one cabin in my life with no electric power. Just a portable propane tank for heat.
 
I can think of a number of off grid redneck setups in town run off car batteries , harbor freight PV's, etc.

Most violate the last century of building codes, so the thought of imposing them would definitely be a venture for very patient sorts

~RJ~
 
Besoeker said:
Even if code compliant it may not be a very practical proposition.
Could you run an electric cooker, washing machine, clothes dryer, etc on a 24V supply?
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I was thinking that some equipment made for RVs or tractor trailers might run on 24 volts ac, but it seems to me you would have to go out of your way to find equipment to use 24v AC
 
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