Electrical Wiring in the Home/Sub panel Generator ground


I have a detached garage with a 60A sub panel it is grounded at the garage (as I believe to be required by code). I plan to put a generator in the garage (to keep it from disappearing) and back feed through the garage sub panel to a transfer switch inside the house.

Does code allow to ground the generator at the sub panel or am I required to provide a ground back to the house?

Thanks for the advice in advance.


Your question is really a moot point because you can not back feed a generator into an existing electrical system the way you are proposing or any other way for that matter. Some folks try to do it through a dryer receptacle or the way your saying but either way its illegal to do and potentially dangerous. If you burn your house down or electrocute a utility lineman your in serious trouble.

The correct way to do it is installing a transfer switch by the main panel where it is not possible to have the generator "back feed" into the utility system and your electrical system can only be hooked up to the utility or the generator but never both at the same time.
There are a few different ways this can be done legally but using an "interlock kit" is the simplest and easiest way to go about doing it. Just look up "interlock kit" and you can read all about how it works but thats probably the best solution for you.

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Electrical Wiring in the Home

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Licensed Master Electrician (32 years) 6165B Contractor in Closter New Jersey with 40 years total experience in Residential - Commercial - Industrial work. Emergency Service - General trouble shooting and repair work - ONAN & GENERAC generator installation - Paddle fans - Kitchen & Bath exhaust fans - AC lines - Smoke detectors - Telephone lines - Cable TV lines - Computer network cabling - Exterior lighting - Recessed lighting - Security lighting - (200 - 150 - 100 amp service up grades) - Electric Heat - New circuits - New appliance hook ups - and more ! FREE ESTIMATES 201-358-1552 Fully Insured


Licensed contractor in Closter New Jersey.

"The Frank Williams School of Electrical Construction". My dear old boss is 100 ! and still going God Bless him. I started working for "Tenafly Electric" right out of high school at 19. He was tough but I learned more working for him in 8 and half years than most guys. We did mostly industrial work while doing some commercial and residential so I was fortunate to be exposed to all 3 areas of electrical construction. The guys I worked with were all good guys and I stay in touch with some of them still. Most of us went into our own buisness's which says something about the caliber of the guys I worked with. We had some interesting clients : Wella Corp. of shampoo fame, Farah Fawcett etc, I didn't buy shampoo for 10 years. It was a great place to work. Pan Am the former airline just before they went under, another great place to work, nice clean environment. C&C Metals, the largest button manufacturer in the US at that time, a not so clean environment but a very interesting place to work, lots of machine's cranking out buttons of all kinds but you had to be on your toes, it was a potentially dangerous place to be . All kinds of action going on around you.

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