Approved as an American National Standard
ANSI Approval Date: August 20, 2008
NEMA Standards Publication ANSI/NEMA WD 6-2002 (R2008)
Wiring Devices—Dimensional Specifications
Excerpt: Dimensions for Wiring Devices
Published by
National Electrical Manufacturers Association
1300 North 17th Street
Suite 1752
Rosslyn, Virginia 22209
www.nema.org
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© Copyright 2008 by the National Electrical Manufacturers Association. All rights including translation into
other languages, reserved under the Universal Copyright Convention, the Berne Convention for the
Protection of Literary and Artistic Works, and the International and Pan American Copyright Conventions.
NOTICE AND DISCLAIMER
The information in this publication was considered technically sound by the consensus of persons
engaged in the development and approval of the document at the time it was developed.
Consensus does not necessarily mean that there is unanimous agreement among every person
participating in the development of this document.
The National Electrical Manufacturers Association (NEMA) standards and guideline publications,
of which the document contained herein is one, are developed through a voluntary consensus
standards development process. This process brings together volunteers and/or seeks out the
views of persons who have an interest in the topic covered by this publication. While NEMA
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the accuracy or completeness of any information or the soundness of any judgments contained in
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information not covered by this publication.
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ANSI/NEMA WD 6-2002
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CONTENTS
Page
Foreword….. .......................................................................................................................................... ii
Scope…….. .......................................................................................................................................…..iii
Introduction…......................................................................................................................................... iv
Wallplate Dimensions…..........................................................................................................................1
Yoke Dimensions of Receptacles and Switches for Box Mounting….. ...................................................8
Yoke Dimensions for 2 Gang Mounting Receptacles…..........................................................................9
Dimensions for Duplex Devices….. ......................................................................................................10
Dimensions for Rectangular Face Devices….. .....................................................................................11
Dimensions for Rectangular Face Devices with Protruding Actuators….. ............................................12
Dimensions for Round and Rectangular Face Single Devices…..........................................................13
Dimensions for Interchangeable Type: Single, Duplex, and Triplex Devices…....................................14
Wiring Device Maximum Envelope Dimensions..…..............................................................................15
Dimensions for Flanged Inlets and Connector Bodies….. ....................................................................16
Flat Blade Hole Locations…..................................................................................................................17
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ANSI/NEMA WD 6-2002
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Foreword
The purpose of these Standards is to present the dimensional requirements of wiring devices
in order to assist the user in selecting and obtaining the proper product for a particular need
and to minimize the possibility of unsafe interchangeability between configurations.
In the preparation of this Standards Publication, input of users and other interested parties has
been sought and evaluated. User input will be formally sought by the canvas procedures of
the American National Standards Institute.
The Communications Department has worked closely with the Engineering Department and
with individual NEMA Subdivisions in the drafting of this manual and acknowledges the need
for periodic review and updating. Proposed or recommended revisions should be submitted to:
Vice President, Technical Services
National Electrical Manufacturers Association
1300 North 17th Street, Suite 1752
Rosslyn, Virginia 22209
Publication ANSI/NEMA WD 6-2002 revises and supersedes NEMA Standards Publication WD 61997.
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ANSI/NEMA WD 6-2002
Page iii
Scope
These Standards cover dimensional requirements for plugs and receptacles rated up to 60
Ampere and 600 Volts. They also include dimensions for wall plates.
These Standards do not cover performance or other requirements since these are included in
NEMA Standards Publication WD 1, General Requirements for Wiring Devices.
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ANSI/NEMA WD 6-2002
Page iv
Introduction
Throughout this publication the following shall apply:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
All dimensions are in inches, unless otherwise specified.
Decimal dimensions without tolerances shall be subject to a plus or minus 0.005inch tolerance.
Angular dimensions without tolerances shall be subject to a plus or minus 1 degree
tolerance.
“G” denotes equipment ground.
“W” denotes system ground.
Leading edges of plug blades shall be free of burrs and sharp edges.
All slots and slot tolerances are symmetrically located about centerlines.
Female contacts associated with plug blades that are 0.125 minimum longer than
other blades are engaged prior to the other female contacts.
Configurations utilized on alternating current systems are limited to 50 or 60 Hertz,
unless otherwise specified.
Dimensions shown in these standards are for the purpose of interchangeability, and
do not preclude other designs.
The electrical ratings of the configurations in these standards are AC and DC, unless
specifically stated ‘AC’ or ‘DC.
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© Copyright 2002 by the National Electrical Manufacturers Association.