Wiring the Ground for a Generator and Transfer Switch
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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. |
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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.
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Coincidence, I have the Q310C which is a direct connection of the cable to the terminals inside the transfer switch vs. the Q310A in which the cable is plugged directly into the power inlet on the switch.
Just be aware that with a direct plug such as the Q310A, a junction box between the connection to the generator and the plug into the transfer switch must be provided so that the junction box is grounded with the ground wires from the cable.