Article 399 Wiring Method Ampacity Requirements

[xptpcrewx]

Wondering if there are any ampacity requirements in the NEC for Outdoor Overhead Conductors Over 1000-V (Article 399)? Thanks in advance.

 

[don_resqcapt19]

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.

 

[xptpcrewx]

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.

The tables in 310.60 (or Article 311) are only for type MV cable. What about exposed/bare overhead conductors...

 

[don_resqcapt19]

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]

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.