This question was asked on another forum. I would like to hear your response.
A 240-volt, single-phase, 250-ampere load is supplied from a 300-ampere breaker located in a panelboard 500 ft away. The conductors are 250-kcmil copper, installed in rigid nonmetallic conduit, with a 4 AWG copper equipment grounding conductor. If the conductors are increased to 350 kcmil, what is the minimum size for the equipment grounding conductor based on the proportional-increase requirement?
The caculations were made correctly and #2 copper was given as the proper size.
There was nothing said about the 500 ft and its impact on the EGC.
You comments please.
[This message has been edited by Bob (edited 11-30-2005).]
