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Electrical Wire and Cable

Grounding an Electrical Panel

By Dave Rongey - Summary:

How to Ground a Electric Circuit Breaker Panel: Grounding Requirements for Electric Panels, National Electrical Code, NEC Article 250, Grounding a Main Panel, Grounding a Sub-Panel, Electrical Grounding Methods.

Guide to Grounding Requirements for Electric Panels

Electrical Question: How do I ground a breaker panel to the ground bar.

Thank You.

This electrical wiring question came from: hector, a Handyman from St. Cloud, Florida.

Additional Comments: Its a very helpful site.

Dave’s Reply:
Thanks for your electrical wiring question Hector.

How to Ground a Electric Circuit Breaker Panel


Skill Level: Advanced – Licensed Electrical Contractor, Not Recommended for Homeowners.
Tools Required: Electricians Pouch of Hand Tools.
Estimated Time: Depends on the extent of the project, the panel make and model, and the grounding method to be used.
Precaution: If the only ground source for the electrical system will be removed or modified then the electrical service should be shut off until the new ground source can be reconnected.
Notice: Making changes to the Electrical Service Panel should be done with a permit and be inspected.

Grounding Requirements for Electric Panels

PLEASE NOTE: This question did not state if the GE 125 amp panel is a main panel or a sub panel, which makes a very big difference with the grounding method as outlined below:

Electrical Grounding Methods

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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.

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Listing of electrical codes for grounding with examples of electrical grounding codes for home electrical wiring.

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MORE ABOUT THIS TOPIC: Electrical Code NEC, Electrical Wiring, NEC 250-50 Premise's Electrical Service, NEC 250.5 Grounding and Bonding

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FAQs Frequently Asked Questions and Comments

2 Responses to “Grounding an Electrical Panel”
  1. Dave Rongey says:

    Hi William,
    Please refer to the Electrical Code section of this website for sizing your sub panel ground wire.
    A ground wire may not be spliced, but must be continuous.
    Attaching other wires to the ground rod would depend on what the system may be and how it is connected.
    I hope this helps,

  2. William Schymick says:

    I have installed a 125 amp sub-panel, serviced with #2 stranded copper. I have a grounding rod implanted for use as a supplemental exterior ground.

    1. Can I use left over #2 insulated stranded wire for this ground? or, must it be exposed solid copper? (# 4 or #6)
    2. Can the ground wire be spliced?
    3. Can I attach other ground wires to the grounding rod, or must it be used only for the sub-panel?