electrical question

dbs81489November 26, 2013

My buddy just bought a house and the main 200 amp panel is in his basement. In his detached garage there is another panel that has a 100 amp main breaker. This breaker is fed from the 200 amp main panel but is terminated on the same lugs that the utility/meter service cable are in. Is this ok?

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petey_racer

If the sub-feed is literally under the same lugs as the 200A main cable in the meter pan then NO, IT IS NOT OK!

Your post is contradictory though, you say it is under the same lugs, but you also say it is fed from the 200A panel. Which is it?

    Bookmark   November 26, 2013 at 6:56AM
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dbs81489

Not the meter pan but under the 200 amp breaker lugs

    Bookmark   November 26, 2013 at 7:27AM
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bus_driver

So the conductors to the 100 amp garage panel are installed at the top of the 200 amp breaker?

    Bookmark   November 26, 2013 at 10:14AM
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dbs81489

Yes

    Bookmark   November 26, 2013 at 11:07AM
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Ron Natalie

Not OK for two reasons.

First those lugs aren't designed to have more than one conductor in them. That alone is potentially causing problems.

Second the feeder needs over current protection which is not being provided.

    Bookmark   November 26, 2013 at 1:36PM
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bus_driver

Agree about the matter of the lugs and that alone is enough to fail inspection. Another concern is the length of the run to the garage panel that has no on-premises overcurrent protection.

    Bookmark   November 26, 2013 at 2:17PM
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btharmy

It needs to be fed from a 2 pole breaker.

    Bookmark   November 26, 2013 at 5:49PM
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dbs81489

Ok I will tell my friend this needs to be fixed. I appreciate it thanks.

    Bookmark   November 26, 2013 at 9:03PM
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btharmy

I would verify if it is fed with a 4 wire or 3 wire feeder. It needs 2 hots, 1 neutral(insulated) and 1 ground.

    Bookmark   November 27, 2013 at 5:20PM
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fa_f3_20

Which also leads one to wonder if the circuits in the subpanel have neutral and ground separated...

    Bookmark   November 28, 2013 at 3:22PM
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