NEMA revises guidelines for metallic and nonmetallic cable

Mar 11, 2005

NEMA, The National Electrical Manufacturers Association, has released two revised wire and cable standards: RV 1-2004, Revision 1, Application and Installation Guidelines for Armored Cable and Metal-Clad Cable, and RV 2-2005, Application and Installation Guidelines for Nonmetallic-Sheathed Cable and Underground Feeder and Branch Circuit Cable.
  
RV 1-2004,  Revision 1 addresses product applications and industry recommended practices for the installation of Type AC and Type MC cables in accordance with the National Electrical Code, and references related NEC articles and UL Electrical Equipment Directory information. This revision of the first edition includes updated references to articles and sections in the 2005 NEC, and revises the fitting assembly technique to reflect current industry practice. In addition to installation requirements and proper termination techniques, the guidelines cover the definition, NEC rules, causes, and adverse effects of and remedies to harmonics. The document also discusses homeruns (defined as the cable's run back to "home," the load center or panelboard, which ends at the first distribution or junction box) and their advantages; voltage drop as it relates to operational efficiency; and cable ampacities and derating.
  
"The Building Wire and Cable Committee and the RV 1 subcommittee," says George Straniero, committee chairman, "have done a tremendous job assembling and developing information into a guide that will be useful to designers, specifiers, contractors, electricians, apprentice programs, and anyone who wants to be sure that the proper armored cable product is specified for an application and that the cables are properly installed to ensure a safe and trouble-free electrical installation."
  
RV 2-2005 addresses product applications and industry recommended practices for the installation of Type NM-B and Type UF-B cables in accordance with the NEC, as well as references to related NEC Articles and UL Electrical Equipment Directory information. In addition to the essential installation requirements and proper termination techniques, these guidelines address appropriate steps in the event cable has been damaged and other special considerations when installing NM-B and UF-B cable, such as exposed work and installing in unfinished basements.
  
"The development of RV 2 is another example of NEMA's focus on providing customers with tools to assist proper and safe use of our products," says Randy Kummer of Southwire Company. "It provides clear, concise, and complete direction for the installer by either answering general questions within the document or providing quick reference as to where they can find more detailed information."
  
RV 1 may be viewed or purchased for $56.00 by visiting www.nema.org/stds/rv1.cfm; RV 2 may be viewed or purchased for $45.00 by visiting www.nema.org/stds/rv2.cfm or by contacting Global Engineering Documents at (800) 854-7179 (within the U.S.), (303) 397-7956 (international), or (303) 397-2740 (fax).
Show Comments
Hide Comments

Join the discussion

We welcome your thoughtful comments.
All comments will display your user name.

Want to participate in the discussion?

Register for free

Log in for complete access.

Comments

No one has commented on this page yet.

RSS feed for comments on this page | RSS feed for all comments