Guyute
Member
- Location
- Ft Collins, CO
Setting ambient temps aside, I would like to know if a boat(three conductors and a neutral) should be counted as 3 or 4 current carrying conductors. According to 310.15(B)(5)(a) the neutral does not need to be counted. Can someone give me an example of (b) in the same section. If I read that correctly it is saying if there are more than one phase conductors(i.e boat) then the neutral does need to be counted when derating the wire ampacity. Also, when derating which temp column can I use to derate(60, 75, or 90)? Of course all this aside, we are now required to simultaneosly turn off all three circuits if we share that neutral. Thanks for your thoughts