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Old 01-09-2011, 11:31 PM   #16
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generator distribution panel


From the sound of it you have the ability to back feed the service and cross your entrance with the generator.

this is how I understand it:

Service drop-(split)----panel 1-------(subpanel that splits to both panels)
-----Panel 2 ------



If this is the case it is an illegal installation.

YOU MUST have a means of MECHANICAL PHYSICAL interlock between or at/in the FIRST point of service entry to the structure and the Generator input.

You cant just flip a breaker on your mains. THEY MUST be interlocked. The generator circuit CANNOT BE ENERGIZED at ANYTIME by the service feed.

Now to answer your question, your ground and neutrals SHOULD be separate from the generator to the panel. Once inside the first panel they can be bonded together. But you run 4 wires from a 240 genset for a reason. You also should have a ground rod that is separate from the service ground rod. (Basically stating your generator should be grounded)

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Old 01-10-2011, 09:10 AM   #17
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Quote:
Originally Posted by LyonsElecSupply View Post
From the sound of it you have the ability to back feed the service and cross your entrance with the generator.

this is how I understand it:

Service drop-(split)----panel 1-------(subpanel that splits to both panels)
-----Panel 2 ------



If this is the case it is an illegal installation.

YOU MUST have a means of MECHANICAL PHYSICAL interlock between or at/in the FIRST point of service entry to the structure and the Generator input.

You cant just flip a breaker on your mains. THEY MUST be interlocked. The generator circuit CANNOT BE ENERGIZED at ANYTIME by the service feed.

Now to answer your question, your ground and neutrals SHOULD be separate from the generator to the panel. Once inside the first panel they can be bonded together. But you run 4 wires from a 240 genset for a reason. You also should have a ground rod that is separate from the service ground rod. (Basically stating your generator should be grounded)
Service drop split to two meters then to each main panel. Both mains are interlocked, there is no way for the genny sub panel to become energized from poco power

Ground rod is out next to shed with wire and removable ground clamp.
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Old 01-10-2011, 09:30 AM   #18
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generator distribution panel


superfluous material deleted

Somehow I abhor having to separate neutrals and grounds in the main panel (turning it into a subpanel) as part of the process of installing a generator. Without doing that we will have neutral from the genny separate from the ground entering the genny panel, perhaps neutral is not bonded to ground there, and neutral stays bonded to ground in two other places, namely in the main panels on each side. Probably innocuous and inconspicuous given the main panels are just a few feet away. Thus I prefer to set up a generator as a separate subsystem with temporary cord and plug connections to the items I want to energize. Particularly if it serves more than one home..

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Last edited by AllanJ; 01-10-2011 at 09:59 PM.
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