100 amp service from 200 amp panel

Old 12-02-20, 11:13 AM
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100 amp service from 200 amp panel

I am running a 100 amp service from this panel to my new building 200 feet away, will be using 2/2/2/4 aluminum buried wire. my question is this, am I okay to just use the open space on the upper left of the panel for my 100 amp breaker? The bottom left breaker is to an outside generator outlet with the required lockout for the main when in use, I have never used this since I have lived in this house, and although it would make installation much simpler to do away with that, as soon as I did I would probably need it and regret it, I could relocate all of the rest of the breakers on the left up a couple of spaces to make room for the new breaker, but is this really necessary ?
Thanks for you help

Last edited by Earlcro43; 12-02-20 at 12:04 PM.
Old 12-02-20, 01:12 PM
Join Date: Feb 2016
Location: United States, Virginia
Posts: 1,851
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Upper left spaces are fine. Your problem is #2 Al is only to be used for up to 90A per the NEC. To compound the problem is 200ft is going to cause voltage drop.
For 100A at 200ft I'd use 2/0-2/0-2/0-1 Al MHF. I suggest not using URD as it is not to enter the structure.
CasualJoe voted this post useful.

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