NEMA Revises ANSI/NEMA MW 1000-2008 Magnet Wire Standard

The National Electrical Manufacturers Association has published ANSI/NEMA MW 1000-2008, Revision 1-2009 Magnet Wire. MW 1000, produced by NEMA’s Magnet Wire Section, is a standards publication for general requirements, product specifications, and test procedures for magnet wire. This revision updates MW 1000-2008, which was published in March 2009.

The revised publication features significant updates, including:

  • Substantive changes to several test procedures in order to better define the equipment, materials, or test conditions that these procedures specify. Amended tests include the bond strength test procedure, the transformer oil resistance and hydrolytic stability test, and the high voltage continuity test
  • New Appendix E, "General Rules for Rectangular Wire Dimensions"
  • New definitions
  • Reorganized table of requirements for bare rectangular wire
  • Updated requirements and specifications

"The Magnet Wire Section has consistently worked to improve MW 1000, keeping pace with changes in manufacturing technology and user needs," said Don Barta, chair of the Magnet Wire Technical Committee and manager of product/polymer engineering at Rea Magnet Wire Company. "This latest collaboration of industry experts has resulted in this necessary and beneficial update for magnet wire stakeholders."

The contents and scope of MW 1000 may be viewed, or a hardcopy or electronic copy purchased for $99, by visiting www.nema.org/stds/mw1000.cfm.

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