Wiring the Ground for a Generator and Transfer Switch

How to Connect Grounding for Generators: The portable generator does not require a separate ground rod, however any electrical wiring enclosure including the generator transfer switch is required to be grounded to the ground system of the main panel of the home electrical system.

Grounding a Generator and Transfer Switch
Electrical Question: I want to hook up a Generac GP6500 portable generator to my house, with a Reliance Q310A transfer switch, for use when the power goes out.

• I’ve made all the proper connections in the main panel as described in the transfer switch instructions.
• Do I need to run a separate ground wire to a grounding rod from the generator, or is the ground connection from the generator through the transfer switch which in turn goes through the main panel and out to the existing grounding rod sufficient?

This generator question came from: Dave, a Handyman from Malvern, Pennsylvania.

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

How to Connect Grounding for Generators

• The portable generator does not require a separate ground rod, however any electrical wiring enclosure including the generator transfer switch is required to be grounded to the ground system of the main panel of the home electrical system.
• Make sure you are in compliance with your local building department’s requirements for home generators, and that the installation of the generator transfer switch and electrical wiring has been inspected.

More about Home Generators:

• Generator Section
• The Importance of a Generator Transfer Switch
• Home generators

• Home Generators
• This series covers a wide variety of topics all about home generators including sizing, selecting, connecting and safely operating this all important addition to your home.

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• Complete listing of electrical wire types and parts used for home projects with electrical code information serves as selection guidelines.

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Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

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Home Electrical Wiring and Electrical Repairs Please Note: Unless otherwise posted, please refer to the following Guidelines when working on Electrical Projects: Skill Level: Intermediate to Advanced - Electrical Repairs and Circuit Wiring is Best Performed by a Certified Electrician or Licensed Electrical Contractor. Electrical Tools Required: Basic Electricians Pouch of Hand Tools, a Voltage Tester and a Multi Meter. Estimated Time: Depends on personal level experience, ability to work with tools, work with electrical wiring, and the available access to the project area. Precaution: Identify the project circuit, turn it OFF and Tag it with a Note before working with the wiring. Important: Modifying existing electrical circuits or installing additional electrical wiring should be done according to local and National Electrical Codes, with a permit and be inspected.

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