110.14C Temperature Limitations...

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xformer

Senior Member
Location
Dallas, Tx
Occupation
Master Electrician
So, I cannot use a 90C conductor on a 60C termination even though I use the ampacity of the wire at 60C?
 

augie47

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Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired)
You can use the 90? rating for derating purposed (fill, ambient, etc) so long as you use the 60? rating for the final termination when required.
(6 #6s THHN in a conduit, all current carrying.. 75amps @90? x 80% = 60, but IF your termination is limted to 60? the ampacity would be 55 amps)
 
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