NEMA published ANSI/NEMA WC 71 ICEA S-96-659-2014 Nonshielded Cables Rated 2,001–5,000 V for Use in the Distribution of Electric Energy. Standard applies to materials, constructions, and testing of 2,001 through 5,000 Volt nonshielded power cables having insulations of thermoplastic polyethylene, cross-linked polyethylene, or cross-linked rubber. Last published in 1999, document is for users and producers of insulated cable.