Wire size for panel mount 100A breaker

Started by mofawayesu, May 13, 2013, 01:57:21 PM

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mofawayesu

What's the recommended wire size for the panel mount 100A breaker?  The epanel manual suggests using #6 for the 63A DIN mounts, #4 for the 80A breakers, but doesn't mention the 100A units.

Thanks!


mtfalk64

100 amp should be #2 or #1/0 cable

Mike


Halfcrazy

It depends on where it is going. If it is in an E-Panel and going out to a Classic then #4 is what you want to use.

Ryan
Changing the way wind turbines operate one smoke filled box at a time

mofawayesu

Thanks, Mike & Ryan.  The connection in question IS running between an epanel and a Classic, so #4 it is.  Having looked at some ampacity tables, some have noted higher rattings for THHN/USE-2 and the like.  Should it be THHN etc. in my case or does it matter?

Mike

boB

Quote from: mofawayesu on May 13, 2013, 05:02:24 PM
Thanks, Mike & Ryan.  The connection in question IS running between an epanel and a Classic, so #4 it is.  Having looked at some ampacity tables, some have noted higher rattings for THHN/USE-2 and the like.  Should it be THHN etc. in my case or does it matter?

Mike

Just be careful of stiff cable like THHN so that it doesn't break the posts off the breaker.

Routing it carefully should take care of that.

boB

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