Sub Panel

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I have two questions.

1) Is it against code for a 100 amp main panel to feed a 100 amp sub panel?

2) Is it against code for a 100 amp sub panel to feed another 100 amp sub panel. In this case the first sub panel is being fed by a 200 amp main panel.

My friend and I are having a difference of opinion on these 2 questions. We are not finding anything in the code book to explain it one way or the other. What do you think? Thanks
 

charlie b

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Lockport, IL
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Retired Electrical Engineer
You can have a 100 amp main panel provide power to a 400 amp sub panel. The issue is the amount of "calculated load" to be served by the sub panel, not the rating of the sub panel.
 

iwire

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Staff member
Location
Massachusetts
I have two questions.

1) Is it against code for a 100 amp main panel to feed a 100 amp sub panel?

2) Is it against code for a 100 amp sub panel to feed another 100 amp sub panel. In this case the first sub panel is being fed by a 200 amp main panel.

My friend and I are having a difference of opinion on these 2 questions. We are not finding anything in the code book to explain it one way or the other. What do you think? Thanks

You hoping someone will see it your way over here? :grin:
 
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