TConnolly
Lifetime Supporting Member
But Terry, with all due respect, I think you're missing the point. I don't think the reason for 310.4 has anything to do with voltage drop. The code has an exception for large wires (I imagine for mechanical reasons as 2" diamter wire would be a lot harder to work with than several 500MCM wires) so it makes it clear what the required condition is for smaller gage wires.
There are also other reasons besides voltage drop for using parallel conductors, one such example is high power high frequency applications.
I've had my rants about how the NEC is written myself.
There are also other reasons besides voltage drop for using parallel conductors, one such example is high power high frequency applications.
I've had my rants about how the NEC is written myself.