Ampacities table

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melanconelectric

melanconelectric

Member
Location
West Monroe, LA
Im having a disagreement with a local AHJ and he tells me that I have to use the 60 deg. colomn in commercial work and the 90 deg. in residential. I told him he was crazy! Just to clarify: The ampacities are based on insulations/wire types, correct? Example: THHN: 90 DEG.; UF: 60 DEG.
The only exceptions are residential uses the residential chart and derating calcs are allowed to use the 90 deg. for calc purposes only

Im not crazy here, am I guys? It doesn't say anything about a "commercial" colomn?

Help me out!
 
celtic

celtic

Senior Member
Location
NJ
melanconelectric said:
Im having a disagreement with a local AHJ and he tells me that I have to use the 60 deg. colomn in commercial work and the 90 deg. in residential. I told him he was crazy! Just to clarify: The ampacities are based on insulations/wire types, correct? Example: THHN: 90 DEG.; UF: 60 DEG.
The only exceptions are residential uses the residential chart and derating calcs are allowed to use the 90 deg. for calc purposes only

Im not crazy here, am I guys? It doesn't say anything about a "commercial" colomn?

Help me out!
Click to expand...

I'd give 110.14 a very heavy eyeballing.
 
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