NEMA Guidelines for the Selection and Installation of Underground Nonmetallic Duct
standard by National Electrical Manufacturers Association,
NEMA VT P1-2018
The Value of Volt-VAR Technologies
standard by National Electrical Manufacturers Association, 11/01/2018
NEMA WC 58-2008/ICEA S-75-381
Portable and Power Feeder Cables for Use in Mines and Similar Applications
standard by National Electrical Manufacturers Association, 08/04/2008