Breaker size for 255EXT?

[Rambozo]

It's not up to the wire, it's the NEC that sets how much current is allowed for what size wire runs. There are different rating for different temperature insulation ratings, along with raceway type and distance calculations. You local codes will also supersede the NEC for some things.

[Rivets]

It's not up to the wire, it's the NEC that sets how much current is allowed for what size wire runs. There are different rating for different temperature insulation ratings, along with raceway type and distance calculations. You local codes will also supersede the NEC for some things.

Ah yes. Here's the simplified, (meaning other factors are ignored) relevant chart.

http://www.usawire-cable.com/pdfs/NEC%20AMPACITIES.pdf

Thanks for pointing that out.

rivets

[everlastsupport]

It's not up to the wire, it's the NEC that sets how much current is allowed for what size wire runs. There are different rating for different temperature insulation ratings, along with raceway type and distance calculations. You local codes will also supersede the NEC for some things.

Gotta love the local codes and people. If he does it properly that is.