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Old 05-22-2008, 01:58 AM   #16
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Choosing Proper Wire size


Quote:
Originally Posted by Holden McGroin View Post
Use the following guide:
15 amps = 14ga.
20 amps = 12 ga.
30 amps = 10ga.
40 amps = 8 ga.
50 amps. = 4-6 ga.

That listed is for copper wires but however with alum wire it will change a bit.

alum size

30 amp = 8 ga
40 amp = 6 ga
50 amp = 6/4 ga size
60 amp = 4 or 2 [ some case you can snag on #3 but this is kinda rare bird on this size]

Please note on the latter two you may wondering why i listed two size due depending if you are running NM or SE cable and code cycle it will fall into two spots the larger one is in effect on 08 codes due NM and SE have to use 60C rating the older code can use 75C rating but however some breaker are only rated to use 60C termations so watch out on this part. { ditto with copper wire verison as well }

[ A good inspector will nail on this one if he can catch it ]

Merci,Marc


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