110.14 90/310.16 Degree column

You cannot use it for 100 amp or less or for more than 100 amps either. As EF stated the terminations limit you to 90° C.

Joseph when you have a moment please update your profile to indicate your Location and Occupation. Thanks.

While we're at it electrofelon please update yours as well.

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"USE THE 90 COLUMN" is a broad statement. Most use that column for derating as 90 degree conductors are the most prevalent (THWN-2).
As to terminating at the 90 degree rating, you are correct, 110.14 would prevent that for most, al;though not all, applications.
However, it should be noted that 110.14(C)(1) for 100 amp or less terminations does allow fopr conduto0rs with higher temperature ratings top be used if equipment is listed for such conductors. It is commonplace for equipment 100 amps or less to allow 75 degree termination ratings.
 
It gets interesting if you have a system thats over 600V and 1000V or less, that was installed prior to the 2017 NEC.
 
augie47 said:
"USE THE 90 COLUMN" is a broad statement. Most use that column for derating as 90 degree conductors are the most prevalent (THWN-2).
As to terminating at the 90 degree rating, you are correct, 110.14 would prevent that for most, al;though not all, applications.
However, it should be noted that 110.14(C)(1) for 100 amp or less terminations does allow fopr conduto0rs with higher temperature ratings top be used if equipment is listed for such conductors. It is commonplace for equipment 100 amps or less to allow 75 degree termination ratings.
Click to expand...
And just for completeness it should be noted that you can use the 90 degree for conductors if you transition to 75 degree conductors for termination. And don't be fooled by what the lugs on/in equipment say (most likely 90). It is what the EQUIPMENT is listed for, and it will NOT be 90 for any <600V equipment.
 
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