Article 399 Wiring Method Ampacity Requirements

don_resqcapt19

Moderator
Staff member
Location
Illinois
Occupation
retired electrician
I believe the tables in 310.60 of the 2017 NEC apply to those installations. If you are using the 2020, the over 1000v ampacities are in Article 311.
 

don_resqcapt19

Moderator
Staff member
Location
Illinois
Occupation
retired electrician
The tables in 310.60 (or Article 311) are only for type MV cable. What about exposed/bare overhead conductors...
Then I guess the NEC does not have the required information. It does a very poor job with medium voltage installations.
Many look to the NESC for medium voltage installations.
 

Xptpcrewx

Senior Member
Location
Las Vegas, Nevada, USA
Occupation
Power System Engineer
Then I guess the NEC does not have the required information. It does a very poor job with medium voltage installations.
Many look to the NESC for medium voltage installations.
Thanks don-resqcapt19, this was my initial feeling, but wanted to make sure I wasn't missing anything. If anyone else can chime-in on how to handle this, it would be greatly appreciated.
 
Top