sparks1
Senior Member
- Location
- Massachusetts
Why is there no NEC standard for the number of outlets allowed on a branch circuit?
180 watts per receptacle, is not good limit?
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Because there is no reason for one, it's totally a design issue.Why is there no NEC standard for the number of outlets allowed on a branch circuit?
It's not a limit it's just a number to use for load calcs.180 watts per receptacle, is not good limit?
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180va is commercial. I like to remind folks that for residential, they are "convenience" outlets.
If your bedroom has 12 outlets or 6 the chances are the load would be exactly the same. You are most likely to plug and use simultaneously the same number of items in a given square ft area no matter the number of receptacles available. The more you have the easier they are to access.
I work often in Linclon Co. Tn. We had a meeting there a few years ago and I was under the impression that the State Of Tn. has an amendment to count each outlet inside a dwelling as 180va.(one inspector was counting light bulbs )I still have the paper work somewhere. I too think it's overkill to have convenience outlets counted that way.I went through the Tom Henry course years ago and I recall Mr.Henry using the example of the convenience outlets..His illustration was a example of common sense...
Ok the problem lies with adding more resistance for every outlet that you may add . More resistance more vd
Get over a 0.5 ohm now you start to exceed the 3% recommended by the code
The bigger problem is the available fault current drops way down Read over an 1 ohm
The slows clearing time for the breaker causing wires to heat up and possibly melt , cause damage , or a fire The NEC needs to address this problem..We are way behind the rest other nations when it come to this problem a big design problem!
Ok the problem lies with adding more resistance for every outlet that you may add . More resistance more vd
Get over a 0.5 ohm now you start to exceed the 3% recommended by the code
The bigger problem is the available fault current drops way down Read over an 1 ohm
The slows clearing time for the breaker causing wires to heat up and possibly melt , cause damage , or a fire The NEC needs to address this problem..We are way behind the rest other nations when it come to this problem a big design problem!
That is something that shouldn't even be in the code. Except for some very specific equipment everything out there can tolerate 10% voltage drop with no performance problems or safety concerns.Ok the problem lies with adding more resistance for every outlet that you may add . More resistance more vd
Get over a 0.5 ohm now you start to exceed the 3% recommended by the code
I submit the hundreds of millions of homes in the US not catching fire as evidence to the contrary that there is a problem. This part of the NEC as it exists is fine.The bigger problem is the available fault current drops way down Read over an 1 ohm
The slows clearing time for the breaker causing wires to heat up and possibly melt , cause damage , or a fire The NEC needs to address this problem..We are way behind the rest other nations when it come to this problem a big design problem!
Ok the problem lies with adding more resistance for every outlet that you may add . More resistance more vd
Get over a 0.5 ohm now you start to exceed the 3% recommended by the code
The bigger problem is the available fault current drops way down Read over an 1 ohm
The slows clearing time for the breaker causing wires to heat up and possibly melt , cause damage , or a fire The NEC needs to address this problem..We are way behind the rest other nations when it come to this problem a big design problem!
Ok I will submit one .The State of TN amended the NEC to limit the number of outlets (note: that's outlets, not just receptacle outlets) on AFCI circuits (also note TN only requires AFCI on bedroom circuits).
The intent was to put a stop to the practice some contractors had on connecting 4 and 5 bedrooms to one AFCI due to the cost factor.
My suggestion would be that you document that and submit it for a Code change.
Look at the back of your code book.Ok I will submit one .
Can you send a link for the form to fill out and also related to this question
I needed to to know if the resistance value given in table 8 are the current standards for resistance of wire
Example # 14 is 3.19 ohms per k/ft so that I can make some calculation in order to submit the changes for this design proposal
None of that is really happening, you are really reaching to find a reason.
That is something that shouldn't even be in the code. Except for some very specific equipment everything out there can tolerate 10% voltage drop with no performance problems or safety concerns.
I submit the hundreds of millions of homes in the US not catching fire as evidence to the contrary that there is a problem. This part of the NEC as it exists is fine.
This is nonsense
Ok the problem lies with adding more resistance for every outlet that you may add . More resistance more vd
Get over a 0.5 ohm now you start to exceed the 3% recommended by the code
The bigger problem is the available fault current drops way down Read over an 1 ohm
The slows clearing time for the breaker causing wires to heat up and possibly melt , cause damage , or a fire The NEC needs to address this problem..We are way behind the rest other nations when it come to this problem a big design problem!
When I wire residences, I usually stick to 10 (maybe 12) openings per (15A) circuit. Personal preference.
I don't think the process is open for public inputs to change the 2017 code. The final process to complete the 2017 code is in progress now.Ok I will submit one .
Can you send a link for the form to fill out and also related to this question
I needed to to know if the resistance value given in table 8 are the current standards for resistance of wire
Example # 14 is 3.19 ohms per k/ft so that I can make some calculation in order to submit the changes for this design proposal