Originally Posted by btedford
I am wiring a detached garage with a 100 amp subpanel off my main 200 amp panel, I am running from the main panel 4 - 3 gauge wires. One is green insulated for ground and the other 3 are black identified as white, red and black. My plan was to run all 4 wires in 1 1/2 conduit from main panel to sub panel. I assume the ground I run from the main to the sub panel is sufficient grounding. My question is do I still need to ground the sub panel to a ground rod at the garage? If so do I just ground the can or do I ground to the grounding bar in the panel? I don't think I can sink it 8 feet because of rock. Is this an issue?
I will have a 100 amp breaker in my main panel to support the subpanel.
Thanks in advance
Are you using single wires or a cable? You mention white? Rarely do I see white sold separately at size #3. I am certain its available, but seldom would be used, as #3 can be re-identified.
If you have a cable, post what type of cable you have.