Commercial services 100 A or less conductor sizing

[electrician09]

If all equipment terminations (meter socket, service disconnect, and sub panel) are 75c can service entrance conductors be sized according to 75c. Or are you limited to 60c due to 110.14(c) do to unknown service point connection termination temperature rating? Or is the utility service point connection to service enterance conductors not covered under NEC?

Example #3 AWG CU THWN would be sufficient for 100 amp service due to 75c rating of 100 A ?

 

[augie47]

If all the terminations are 75°, #3 is fine for 100 amp commercial.

 

[electrician09]

Thank you, assuming from that answer unknown utility service point connection temp ratings are not covered under the NEC?

 

[LarryFine]

Welcome to the forum.

It has been said that the NEC regards a meter as "a lump in the service cable."

 

[electrician09]

Welcome to the forum.

It has been said that the NEC regards a meter as "a lump in the service cable."

Hi Larry, I was also referring to the crimps or connectors that connect the utility secondary to the service conductors coming out a over head service mast, Thanks in advance.

 

[LarryFine]

Aha.

Or is the utility service point connection to service enterance conductors not covered under NEC?

Technically, they're not.

Example #3 AWG CU THWN would be sufficient for 100 amp service due to 75c rating of 100 A ?

Yes, it would.

 

[letgomywago]

Hi Larry, I was also referring to the crimps or connectors that connect the utility secondary to the service conductors coming out a over head service mast, Thanks in advance.

Crimps are almost always 90° rated