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

home-electrical-codes-for-grounding

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

More about Electrical Grounding Methods

Electrical Panel Circuit Listing

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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.

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Electrical Codes
Electrical Codes for 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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Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all projects.

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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,
    Dave

  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?
    Thanks,
    BS

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