Sub panel with multiple grounds?
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Sub panel with multiple grounds?
I have a subpanel in my detached garage with a ground coming in from the main panel and a ground coming in from a grounding rod outside of the garage.
Presently, both grounds are wired into a combined neutral/grounding bar. It’s my understanding that a shared busbar is incorrect on a subpanel so I’ve attached a separate ground bar to remedy this.
My question is this;
Should I attach both grounds to the new bus bar? Or do I only need the one coming from the grounding rod? If it is unnecessary, how should I deal with the ground coming in from the main panel?
Thanks in advance for you thoughts.
Presently, both grounds are wired into a combined neutral/grounding bar. It’s my understanding that a shared busbar is incorrect on a subpanel so I’ve attached a separate ground bar to remedy this.
My question is this;
Should I attach both grounds to the new bus bar? Or do I only need the one coming from the grounding rod? If it is unnecessary, how should I deal with the ground coming in from the main panel?
Thanks in advance for you thoughts.
#2
Do you have three or four wires between the main panel and the sub panel ?
Code now calls for four wires.... two hots, neutral and ground.
Both grounds connect to the new ground bar..... as long as there is a neutral wire on the isolated neutral bar.
There may be a neutral bonding screw in the panel that needs to be removed also.
Code now calls for four wires.... two hots, neutral and ground.
Both grounds connect to the new ground bar..... as long as there is a neutral wire on the isolated neutral bar.
There may be a neutral bonding screw in the panel that needs to be removed also.
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Thanks for the reply
I've got 4 wires between the main panel and the sub panel - so I should be good there.
Sounds like it should be simple to switch over the two grounds to the new ground bar.
There doesn't appear to be a bonding screw on the neutral bar, but I'll double check that.
Thanks again.
I've got 4 wires between the main panel and the sub panel - so I should be good there.
Sounds like it should be simple to switch over the two grounds to the new ground bar.
There doesn't appear to be a bonding screw on the neutral bar, but I'll double check that.
Thanks again.