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For a 100 amp service what wire size do I use?

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I am hooking up new...
I am hooking up new 100 amp service. What wire size do I use for weather head to breaker box - Contra Costa County California
Submitted: 5 years ago.Category: Electrical
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5/5/2012
Electrician: Mike G., Master Electrician replied 5 years ago
Mike G.
Mike G., Master Electrician
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The proper wire size is 2 #2 and 1 #4 Aluminum. If you're using a cable for the riser then that would be a 100A SEU.

Mike G.
Mike G., Master Electrician
Category: Electrical
Satisfied Customers: 7,935
Experience: Proven Professional 49 years Experience
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Electrician: Mike G., Master Electrician replied 5 years ago
100A service requires either of the following

Copper wire 2 #4 and 1 #6
Aluminum wire 2 #2 and 1 #4

See the Code Article below


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