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Grounds and Neutrals in Electrical Panel


By Dave Rongey - Summary:

How to Wire Grounds and Neutrals in Sub Panels – all the neutrals and ground wire and terminal bars must be separated from each other, and your sub feed should be a 4-wire cable that has a separated insulated neutral wire and a separate ground wire.

Separation of Grounds and Neutrals in Sub Panels

Electrical Question: I have a new Siemens 100 amp panel. I removed the neutral tie bar, how do I properly bond this panel?

This electrical wiring question came from: Steve, a Homeowner from Arlington Hts ,IL

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

How to Wire Grounds and Neutrals in Sub Panels

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 grounding method to be used and available access to the project area.
Precaution: This is an extensive project that should be performed by a Licensed Electrical Contractor.
Notice: Making changes to the Electrical Service Panel should be done with a permit and be inspected.

The Following will assist you with Grounds and Neutrals in Sub Panels

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FAQs Frequently Asked Questions and Comments

2 Responses to “Grounds and Neutrals in Electrical Panel”
  1. Dave Rongey says:

    Hi Joe,
    The purpose or application for adding a sub panel will be the determining factor which will then justify the required amperage and voltage. Once this has been established then the wide variety of resources found here will help you select the cable size and the panel components. Please see the online panel sizing calculator and voltage drop calculator here on the website to assist you. When installing a 120/240 volt sub panel a 4 wire feeder is installed and the grounds and neutrals must be separated.
    I hope this helps,
    Dave

  2. Joe says:

    I have a 60 amp sub panel and want to add a subpanel off of that. How do I wire this and what size wire can I use? Does the neutral and grounds have to separate? Do I need 4 wire? What size sub panel can I add?