#6 copper or #4 aluminum
Wiki User
∙ 2012-08-09 00:48:583/0
#4 copper.
#6 bare copper wire.
4awg copper to water main, #6 solid to ground rod
#8 is the size of wire to use for grounding a 100 Amp panel. Green is color used for grounding #8 is code.
Minimum size grounding conductor for a 200 amp service entrance is #6 bare copper.
#2 AWG copper to water main #6 AWG copper to ground rod
250
For a service conductor drawing 600 amps a #1 copper grounding conductor is needed.
3/0 or250 aluminum
Use #10 copper.
The neutral is the same size as the feeder conductors for a 200 amp service.