Which column in 310.16 for Romex ?

[Stevenfyeager]

Please help me remember, which ampacity column do I use for romex cable? 75 degree? 60 degree? column for individual conductors ran in conduit? That’s different if I remember. Thank you !

 

[Dennis Alwon]

NM is rated 60C although their are 90C conductors in the cable. You can use 90C for de-rating buit the final overcurrent protective device cannot be more than the 60C column

 

[Stevenfyeager]

Thank you ! That helps a lot.

 

[Stevenfyeager]

What about individual conductors in conduit ? (THHN/THWN)

 

[electrofelon]

What about individual conductors in conduit ? (THHN/THWN)

75, but remember you are restricted to the small Conductor restrictions in 240.4(D) (would not apply to motors and HVAC however)