60 degree ampacity

[dema]

60 degree ampacity

Where does it say that conductors must be sized based on the 60 degree C rating for breakers 100A and under?

 

[iwire]

Re: 60 degree ampacity

Re: 60 degree ampacity

Originally posted by dema:
Where does it say that conductors must be sized based on the 60 degree C rating for breakers 100A and under?

110.14(C)(1)

But it also says "unless marked otherwise"

Most equipment is marked 75 C

[ August 13, 2005, 08:04 PM: Message edited by: iwire ]

 

[GG]

Re: 60 degree ampacity

Re: 60 degree ampacity

If we were talking about NM cable (aka Romex) then 334.80 would limit you to the 60deg. ampacity rating of your conductors, but were not talking about romex so I will shut up.