Electrical Panel Grounding Methods
By Dave Rongey - Summary:|
Can I connect the ground wire to the same slot on the neutral bar and the white neutral wire since the grounding rod wire is already attached?
Electrical Panel Grounding MethodsQuestion:
Background: Pablo, a Homeowner from Mathis, Texas
House has old 2 wire cable with no ground. Electric panel only has one bar. White neutrals are connected here as well as the wire going to the grounding rod – both in main service panel and sub-panel. Question – if I replace the old wire with new cable with ground wire can I connect the ground wire to the same slot on the neutral bar and the white neutral wire since the grounding rod wire is already attached? Or do I need to add a ground bar?
Thanks for your electrical question Pablo. At the Main Panel the Grounds and Neutrals all terminate together on the same terminal bar. In sub-panels all grounds must be separated from the neutrals which requires a separate ground bar to be installed directly to the panel frame or enclosure. Most panels are pre-taped for a ground bar to be installed if there isn’t one already. Neutral bars in sub-panels must not be bonded to the frame of the sub-panel enclosure. 240 volt Sub-Panels require a 4-wire cable feed to provide this separation between the neutral and the ground.
The Following links will assist you with your electrical question:
Electrical Panel Circuit Listing
Sub Panel Electrical Wiring
Electrical Codes for Services
Wiring Electrical Codes
Electrical Wire for the Home
For more information about Grounding
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