NDLI: 2003 report on developments in NEMA magnet wire dimensional and dielectric standards

Content Provider	IEEE Xplore Digital Library
Author	Scherrer, E.J.
Copyright Year	2003
Description	Author affiliation: Rea Magnet Wire Co. Inc., Fort Wayne, IN, USA (Scherrer, E.J.)
Abstract	During the past few years there has been a considerable amount of activity related to developing mathematical definitions of, and improving NEMA dimensional standards for round magnet wire products. Coincident with that development there was also a need to establish meaningful dielectric values for the new or revised dimensional standards. All of the dimension and dielectric test values changes discussed have been included the 2003 edition of NEMA MW 1000. Thus this paper provides a comprehensive overview of the changes and the rationale for them for users of MW 1000. The history of NEMA magnet wire dimensional standards and past efforts to harmonize NEMA dimensional standards with IEC winding wire dimensional standards are briefly reviewed with special emphasis on those dimensional changes or new dimensional specifications that have been introduced into NEMA MW 1000 over the last few years. Specific changes that will be discussed include modifications to: NEMA maximum bare dimensions from 4 AWG to 26 AWG, NEMA Heavy build dimensions from 4-13 AWG, NEMA Single, Heavy, and Triple build dimensions in the 30 to 46 AWG size range and the establishment of a Quad build specifications from 14 to 46 AWG for products other than MW 16 Polyimide. The paper then reviews the results of an industry wide study of dielectric test values of various magnet wire products in the 14-42 AWG size range and demonstrates how those results were used to develop meaningful mathematically based specified minimum test values for Single, Heavy Triple and Quadruple build round wire products in the 14 to 38 AWG size range.
Starting Page	249
Ending Page	253
File Size	401831
Page Count	5
File Format	PDF
ISBN	0780379357
ISSN	03622479
DOI	10.1109/EICEMC.2003.1247892
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-09-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wire Dielectrics Standards development Testing IEC standards History Polyimides Standards publication Size measurement Conductors
Content Type	Text
Resource Type	Article

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