100 amp disconnect

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  #1  
Old 03-06-19, 09:02 AM
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100 amp disconnect

What size wire do I need to run from a 100 amp breaker to a 100 amp 3 phase disconnect 15 feet apart?
 
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Old 03-06-19, 10:29 AM
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Assuming THHN in conduit, no smaller than #3 copper or #2 aluminum.
 
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Old 03-06-19, 10:30 AM
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Old 03-06-19, 11:40 AM
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#1 Al is 100A, #2 Al is 90A.
 
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