NEMA Publishes ANSI/NEMA WC 70-2009 for Power Cables Rated 2000 Volts or Less
July 30, 2009 // Published as a news service by IHS
The National Electrical Manufacturers Association (NEMA) published ANSI/NEMA WC 70-2009/ICEA S-95-658-2009 Power Cables Rated 2000 Volts or Less for the Distribution of Electrical Energy.
NEMA WC 70-2009/S-95-658 contains all construction requirements for the manufacturing of wire and cables, both single conductor and multiple conductor.
Production and qualification testing requirements, as well as special requirements for grounding conductors (if shielding is required) and messenger type cables are described in the standard.
Revisions to the 1999 version of NEMA WC 70 include:
- Added text and a new table for grounding conductors.
- Information regarding use of shielding over a low-voltage multiple conductor cable core.
- Low smoke, zero halogen jacket requirements.
- Requirements of insulation and jacket thickness changed to minimum point, with the thickness tables changed accordingly. Nominal thickness for insulations and jackets was added to the appropriate tables in Sections 3 and 4. A clarification was added that the nominal thickness is not a requirement, making this standard agree with ICEA's other low-voltage standards
- A new appendix, "Procedure for Determining Dimensional Requirements of Jackets and Associated Coverings."
"ANSI/NEMA WC 70/ICEA S-95-658 is the essential resource for low-voltage, 2000 volts and below power wire and cable construction requirements," said E.J. Bartolucci, chair of Insulated Cable Engineers Association (ICEA) WG 658, which produced the standard.
"With the substantial revisions prepared by the ICEA WG 658 committee, this standard is a valuable addition to the libraries of businesses in the utility, industrial, and commercial industries, as well as original equipment manufacturers."
The standard was approved by the NEMA Power and Control Cable membership.
Source: National Electrical Manufacturers Association (NEMA).