Issue:
90 degree C wire at it's rated ampacity for 90 degree C rated breaker.
Product Line:
Circuit Breakers
Resolution:
No. The 2011 NEC defines the temperature rating for circuit breakers as follows:
Per NEC 110.14 (C)(1)(b), the termination temperature rating for breakers rated above 100 A or marked for conductors larger than #1 AWG is 75 deg. C. Note that higher temperature rated insulation (such as 90 deg. C) is permissible, but the wire must be sized per the 75 deg. C column of Table 310.15(B)(2)(b) in the 2011 NEC.
Per NEC 110.14 (C)(1)(a) the temperature rating for breakers rated 100 A or less is 60 deg. C unless otherwise marked.
90 degree C wire at it's rated ampacity for 90 degree C rated breaker.
Product Line:
Circuit Breakers
Resolution:
No. The 2011 NEC defines the temperature rating for circuit breakers as follows:
Per NEC 110.14 (C)(1)(b), the termination temperature rating for breakers rated above 100 A or marked for conductors larger than #1 AWG is 75 deg. C. Note that higher temperature rated insulation (such as 90 deg. C) is permissible, but the wire must be sized per the 75 deg. C column of Table 310.15(B)(2)(b) in the 2011 NEC.
Per NEC 110.14 (C)(1)(a) the temperature rating for breakers rated 100 A or less is 60 deg. C unless otherwise marked.
Released for: Schneider Electric New Zealand
Need help?
Product Selector
Quickly and easily find the right products and accessories for your applications.
Get a Quote
Start your sales inquiry online and an expert will connect with you.
Where to buy?
Easily find the nearest Schneider Electric distributor in your location.
Help Centre
Find support resources for all your needs, in one place.
