when derating wires due to conduit fill, there is exceptions talking about the neutral not needing to be counted as a "current carrying conductor" if it is carrying only the unbalanced load of a multiwire circut.... so when do you not have to count the neutral as a current carrying conductor?
My opinion is that you always count a neutral as a current carrying conductor. If you believe that you have a valid exception then follow it. If you are not sure, don't.
310.15(B)(4) describes the only case I know where you are allowed to not count the neutral conductor as a current carrying conductor.
Personally, I would only use that if I had to. Do understand I prefer a little overkill anytime I can afford it.
when derating wires due to conduit fill, there is exceptions talking about the neutral not needing to be counted as a "current carrying conductor" if it is carrying only the unbalanced load of a multiwire circut.... so when do you not have to count the neutral as a current carrying conductor?
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