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Discussion Starter · #1 · (Edited)
Have a question about doing a multi family dwelling service. Building consists of 6 units plus one extra house panel. Service will be 400amps. 7 position meter stack with 100a branch breakers. What size wire is required to run from stack to each panel. House panel will be installed in what's being considered a commercial space(basement hallway with separate rental-able garage spaces) I want to run ser cable for the apt panels and will probably pipe for the house panel through the basement. I was originally sizing the wire based on 100a service size but in thinking that's not correct. It should be 1-1-1-2 AL SER not 2-2-2-4 AL SER right?
 

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Electrical Simpleton
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#2 aluminum SER would work as long as it isn't ran through thermal insulation.

310.15(B)(7) and 338.10(B)(4).

I need to add that 310.15(B)(7) is only applicable if it is a 120/240 single phase service. You can't use it if it is 208Y/120.

Pete
 

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Discussion Starter · #3 ·
Pete m. said:
#2 aluminum SER would work as long as it isn't ran through thermal insulation. 310.15(B)(7) and 338.10(B)(4). I need to add that 310.15(B)(7) is only applicable if it is a 120/240 single phase service. You can't use it if it is 208Y/120. Pete
Thanks Pete. 1/0-1/0-1/0-1 AL it is
 
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