150 amp sub panel question


Old 05-05-08, 03:59 PM
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150 amp sub panel question

I'm installing a 150 amp subpanel, right next to my existing service . I know I need a 4 wire feed and another ground rod but what size wire is used for a 150 amp sub? I'd like to use aluminum . Thankss
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Old 05-05-08, 04:04 PM
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Under NEC 2005 and earlier use #2/0 aluminum hots and neutral. Under NEC 2008 use #3/0. The ground should be #4 aluminum in either case. A ground rod is not required.
Old 05-05-08, 06:57 PM
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It doesn't sound like you need much wire.
Why not eliminate the problems that are inherent to aluminum and just use copper conductors.
They will be smaller and easier to terminate.
Just my opinion.

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