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waynebo 06-01-2011 02:24 AM

sub panel
 
i am installing a 60 amp sub panel in my garage. the main panel has only a ground bar and the main ground is attached to it. all the neutrals also attach to this bar. my sub panel also has only one bar. should i run a neutral wire from ground bar in main panel to bar in sub panel and ground sub panel to its own ground? (if so can i use a water pipe or does it have to be a ground rod?)

vsheetz 06-01-2011 02:38 AM

Attached or detached garage? Is the subpanel in the same structure as the main panel?

waynebo 06-01-2011 02:40 AM

attached, same structure

NJMarine 06-01-2011 06:56 AM

In the subpanel you will install a ground bar kit. The neutrals and grounds will be on seperated in the subpanel . Since this subpanel is in the same structure another ground rod is not required for the sub.

a7ecorsair 06-01-2011 08:32 AM

Quote:

Originally Posted by waynebo (Post 658964)
i am installing a 60 amp sub panel in my garage. the main panel has only a ground bar and the main ground is attached to it. all the neutrals also attach to this bar. my sub panel also has only one bar. should i run a neutral wire from ground bar in main panel to bar in sub panel and ground sub panel to its own ground? (if so can i use a water pipe or does it have to be a ground rod?)

In addition to the other posting..
You will need to pull 4 wires, two hots, a neutral, and a ground.
At the main the neutral and ground will connect to the neutral bar (ground bar)
At the sub you will have to add a ground bar that will be bonded to the panel case. You will connect all your ground wires to this bar.
The neutral bar in the sub has to be isolated from the case and all the neutral wires will connect here.

WillK 06-01-2011 10:24 AM

For 60 amp in the same building shouldn't he just be able to run 6-3 NM-B, which would provide his 2 hots, 1 neutral and 1 ground?

Just to note in detatched garage NM cable wouldn't be allowed because it is not rated for underground.

I see what you're saying about the ground bar... I ran into the same thing, my garage subpanel is a Homeline 100 amp main breaker load center. You have to buy the ground bar seperately, they give you a multitude of places to install it - it only takes 1 screw and it's located by 2 bumps on the main panel. Real easy. The ground bars can be purchased in various sizes, for me the cost is $4-7 depending on how many screws... I put 2 ground bars in so I could have one on each side so I didn't have to run really long ground conductors around the whole perimeter of the panel.


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