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Sub Panel Grounding and Neutrals

Understanding Grounding for Sub Panels: When you add a second electrical panel with separate neutral and common bars, do you ground the common to the box along with a ground rod connection?

Understanding Grounding for Sub Panels
When you add a second electrical panel with separate neutral and common bars, do you ground the common to the box along with a ground rod connection?


This electrical question came from: John, a Homeowner from Manitowoc, WI
See more about Home Wiring for Wisconsin

Additional Comments: I have recently retired due to a disability. I just love this site thank you so much.

Dave’s Reply:
Thanks for your electrical question John, I hope your doing well, and Thanks for the nice complement.

Grounding for Sub Panels

The Following links will assist you with Grounding for Sub Panels

House Wiring Circuits and Circuit Breakers
This article looks at common 120 volt and 240 volt house wiring circuits and the circuit breakers that are installed identifying the types and amperage sizes used in most homes.

Electrical Grounding
Electrical Grounding Methods and Requirements
Electrical Grounding Methods and Requirements
Listing of electrical codes for grounding with examples of electrical grounding codes for home electrical wiring.

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2 Responses to “Sub Panel Grounding and Neutrals”
  1. Texe says:

    Please explain how 2 ground wires came in to being.
    How do you ground something TWICE? It’s either grounded or it’s not.

    • Dave Rongey says:

      Hi Texe,
      In a home electrical system there is typically a main ground source, which is located at the main panel. The main panel is where all grounding methods are bonded together. This article about sub panels refers to the separation of the ground and the neutral which is required by the NEC electrical code.
      Thanks for your question about electrical grounding,


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