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What size copper wire do I need for 100 amp service?

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asked Dec 12, 2018 in Do it yourself by patrickfrances (240 points)
What size copper wire do I need for 100 amp service?

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answered Dec 13, 2018 by Grahlu (51,270 points)
If you use copper service entrance wire you'll need #6 copper wire which is also known as 3-3-3-5 copper SER cable.

If you want to use Aluminum Service entrance cable it needs to be #2 or #1 aluminum service entrance wire to meet code.

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