UL 310

ISBN 0-7629-0876-9

Electrical Quick-Connect
Terminals
MARCH 8, 2005 − UL 310 tr1

Underwriters Laboratories Inc. (UL)

333 Pfingsten Road
Northbrook, IL 60062-2096

UL Standard for Safety for Electrical Quick-Connect Terminals, UL 310

Seventh Edition, Dated May 27, 2003

Revisions: This Standard contains revisions through and including March 8, 2005.

Summary of Topics

These revisions to ANSI/UL 310 are being issued to remove the Non-Tubular Insulation
Requirements and include other miscellaneous revisions.

Text that has been changed in any manner is marked with a vertical line in the margin. Changes in
requirements are marked with a vertical line in the margin and are followed by an effective date note
indicating the date of publication or the date on which the changed requirement becomes effective.

In the revisions dated March 8, 2005, pages 31 and 32 have been intentionally deleted from the Standard
due to the deletion or relocation of text. Please discard any previous versions of these pages from your
paper copy of the Standard.

The requirements are substantially in accordance with UL’s Proposal(s) on this subject dated January 7,
2005.

The revisions dated March 8, 2005 include a reprinted title page (page1) for this Standard.

As indicated on the title page (page 1), this UL Standard for Safety is an American National Standard.
Attention is directed to the note on the title page of this Standard outlining the procedures to be followed
to retain the approved text of this ANSI/UL Standard.

The UL Foreword is no longer located within the UL Standard. For information concerning the use and
application of the requirements contained in this Standard, the current version of the UL Foreword is
located on ULStandardsInfoNet at: http://ulstandardsinfonet.ul.com/ulforeword.html

The master for this Standard at UL’s Northbrook Office is the official document insofar as it relates to a
UL service and the compliance of a product with respect to the requirements for that product and service,
or if there are questions regarding the accuracy of this Standard.

UL’s Standards for Safety are copyrighted by UL. Neither a printed copy of a Standard, nor the distribution
diskette for a Standard-on-Diskette and the file for the Standard on the distribution diskette should be
altered in any way. All of UL’s Standards and all copyrights, ownerships, and rights regarding those
Standards shall remain the sole and exclusive property of UL.

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise
without prior permission of UL.

Revisions of UL Standards for Safety are issued from time to time. A UL Standard for Safety is current
only if it incorporates the most recently adopted revisions.
tr2 MARCH 8, 2005 − UL 310

UL provides this Standard ″as is″ without warranty of any kind, either expressed or implied, including but
not limited to, the implied warranties of merchantability or fitness for any purpose.

In no event will UL be liable for any special, incidental, consequential, indirect or similar damages,
including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or the
inability to use this Standard, even if UL or an authorized UL representative has been advised of the
possibility of such damage. In no event shall UL’s liability for any damage ever exceed the price paid for
this Standard, regardless of the form of the claim.

UL will attempt to answer support requests concerning electronic versions of its Standards. However, this
support service is offered on a reasonable efforts basis only, and UL may not be able to resolve every
support request. UL supports the electronic versions of its Standards only if they are used under the
conditions and operating systems for which it is intended. UL’s support policies may change from
time-to-time without notification.

UL reserves the right to change the format, presentation, file types and formats, delivery methods and
formats, and the like of both its printed and electronic Standards without prior notice.

Purchasers of the electronic versions of UL’s Standards for Safety agree to defend, indemnify, and hold
UL harmless from and against any loss, expense, liability, damage, claim, or judgement (including
reasonable attorney’s fees) resulting from any error or deviation introduced while purchaser is storing an
electronic Standard on the purchaser’s computer system.

If a single-user version electronic Standard was purchased, one copy of this Standard may be stored on
the hard disk of a single personal computer, or on a single LAN file-server or the permanent storage
device of a multiple-user computer in such a manner that this Standard may only be accessed by one user
at a time and for which there is no possibility of multiple concurrent access.

If a multiple-user version electronic Standard was purchased, one copy of the Standard may be stored on
a single LAN file-server, or on the permanent storage device of a multiple-user computer, or on an Intranet
server. The number of concurrent users shall not exceed the number of users authorized.

Electronic Standards are intended for on-line use, such as for viewing the requirements of a Standard,
conducting a word search, and the like. Only one copy of the Standard may be printed from each
single-user version of an electronic Standard. Only one copy of the Standard may be printed for each
authorized user of a multiple-user version of an electronic Standard. Because of differences in the
computer/software/printer setup used by UL and those of electronic Standards purchasers, the printed
copy obtained by a purchaser may not look exactly like the on-line screen view or the printed Standard.

An employee of an organization purchasing a UL Standard can make a copy of the page or pages being
viewed for their own fair and/or practical internal use.

The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures,
and/or other elements of the Standard having future effective dates as indicated in the note following the
affected item. The prior text for requirements that have been revised and that have a future effective date
are located after the Standard, and are preceded by a ″SUPERSEDED REQUIREMENTS″ notice.

New product submittals made prior to a specified future effective date will be judged under all of the
requirements in this Standard including those requirements with a specified future effective date, unless
the applicant specifically requests that the product be judged under the current requirements. However, if
MARCH 8, 2005 − UL 310 tr3

the applicant elects this option, it should be noted that compliance with all the requirements in this
Standard will be required as a condition of continued Listing, Recognition, and Follow-Up Services after
the effective date, and understanding of this should be signified in writing.

Copyright © 2005 Underwriters Laboratories Inc.

This Standard consists of pages dated as shown in the following checklist:

Page Date

1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . March 8, 2005

4-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . May 27, 2003
6-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . March 8, 2005
9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . May 27, 2003
10-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . March 8, 2005
12-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . May 27, 2003
15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . March 8, 2005
16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . May 27, 2003
17-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . March 8, 2005
19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . May 27, 2003
20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . March 8, 2005
21-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . May 27, 2003
26-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . March 8, 2005
A1-A2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . May 27, 2003
tr4 MARCH 8, 2005 − UL 310

No Text on This Page

MAY 27, 2003
(Title Page Reprinted: March 8, 2005)
ANSI/UL 310-2005
1

UL 310

Standard for Electrical Quick-Connect Terminals

The First through Third editions were titled Quick-Connect Terminals.

First Edition – July, 1976

Second Edition – July, 1978
Third Edition – August, 1981
Fourth Edition – May, 1985
Fifth Edition – November, 1991
Sixth Edition – August, 1995

Seventh Edition

May 27, 2003

The most recent designation of ANSI/UL 310 as an American National Standard

(ANSI) occurred on February 22, 2005.

This ANSI/UL Standard for Safety, which consists of the Seventh edition with
revisions through March 8, 2005 is under continuous maintenance, whereby each
revision is ANSI approved upon publication. Comments or proposals for revisions
on any part of the Standard may be submitted to UL at any time. Proposals
should be submitted via a Proposal Request in UL’s On-Line Collaborative
Standards Development System (CSDS) at http://csds.ul.com.

An effective date included as a note immediately following certain requirements

is one established by Underwriters Laboratories Inc.

Revisions of this Standard will be made by issuing revised or additional pages

bearing their date of issue. A UL Standard is current only if it incorporates the
most recently adopted revisions, all of which are itemized on the transmittal notice
that accompanies the latest set of revised requirements.

ISBN 0-7926-0876-9

COPYRIGHT © 1976, 2005 UNDERWRITERS LABORATORIES INC.

2 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MARCH 8, 2005

No Text on This Page

MARCH 8, 2005 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 3

CONTENTS

INTRODUCTION

1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3 Units of Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3A Undated References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

CONSTRUCTION

4 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
5 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
5.1 Connectors and production tabs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
5.2 Test tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
6 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
6.2 Production tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
6.3 Test tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
7 Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

PERFORMANCE

8 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
9 Preparation of Samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
10 Crimp Pull-Out Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
11 Engagement-Disengagement Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
12 Temperature and Heat Cycling Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
12.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
12.2 Temperature test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
12.3 Heat cycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
13 Dielectric Strength Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
13.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
13.2 Insulation puncture test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
13.3 Flashover (Type A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
13.4 Flashover
13.4 Title revised March 8, 2005 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
14 Secureness of Insulation Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
14.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
14.2 Terminals with insulation other than the tubular sleeve type . . . . . . . . . . . . . . . . . . . . . . .27
14.3 Terminals with insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
15 Moisture-Absorption Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

MARKING

16 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

INSTRUCTIONS

17 Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

4 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MAY 27, 2003

APPENDIX A – MILLIVOLT DROP TEST

A1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A1
A2 Millivolt Drop Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A1
MAY 27, 2003 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 5

No Text on This Page

6 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MARCH 8, 2005

This page intentionally left blank.

MARCH 8, 2005 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 7

INTRODUCTION

1 Scope

1.1 These requirements apply to 0.110-, 0.125-, 0.187-, 0.205-, and 0.250-inch (2.8-, 3.2-, 4.8-, 5.2-, and
6.3-mm) wide electrical quick-connect wiring terminations, both connectors and tabs, for use in electrical
equipment that comply with the requirements for such equipment.

1.2 These requirements apply to terminals intended for use with one or two 22 – 10 AWG (0.32 – 5.3
mm2) copper conductors for internal wiring connections in electrical equipment and for the field
termination of conductors to electrical equipment.

1.3 These requirements do not apply to terminals for use with aluminum conductors.

1.4 These requirements do not apply to multi-pole terminals. Multi-pole terminals are covered by the
Standard for Component Connectors for Use in Data, Signal, Control and Power Applications, UL 1977.
1.4 revised March 8, 2005

2 Glossary

2.1 For the purpose of this standard the following definitions apply.

2.2 BURR – An extraneous protrusion in the stock, not considered an integral functional part of the
connector or tab.

2.3 CONNECTOR – A terminal that is pushed onto a tab.

2.4 C26000 ALLOY – A copper-zinc alloy consisting of approximately 70 percent copper and 30
percent zinc (cartridge brass) as specified by the Copper Development Association’s Copper
Development Alloy (CDA) Standards Handbook, Wrought Copper and Copper Alloy Mill Products, Part
2 – Alloy Data.

2.5 DETENT – A dimple (depression) or hole in a tab that acts to engage a raised portion on the
connector providing a latching means for the mating parts.

2.6 PRODUCTION TAB – A terminal that is inserted in a connector, manufactured to specified

tolerances, and intended to mate with a connector to establish a connection in an electrical circuit.

2.7 QUICK-CONNECT WIRING TERMINATION – An electrical connection consisting of a male tab and
female connector that can be readily engaged or disengaged without the use of a tool.

2.8 REFERENCE POINT – A specially marked point on a connector or tab that is used when making
electrical test measurements.

2.9 TERMINAL – An electrical connecting device consisting of either a connector or tab.

2.10 TEST TAB – A tab manufactured to specified tolerances to provide an accurate base for
measurements for electrical, mechanical, and temperature-rise tests.
8 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MARCH 8, 2005

3 Units of Measurement

3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or
approximate information.

3.2 All alternating-current electrical measurements are in root-mean-square (rms) units unless otherwise
stated.

3A Undated References

3A.1 Any undated reference to a code or standard appearing in the requirements of this standard shall
be interpreted as referring to the latest edition of that code or standard.
3A.1 added March 8, 2005

CONSTRUCTION

4 General

4.1 A terminal shall be designed to provide an electrical connection between wires or between wires and
components in electrical equipment, when used in the intended manner. Additional requirements
concerning certain features such as insulation added at the time of assembly in equipment, spacings
between wiring terminations of opposite polarity and between wiring terminations and non-current-carrying
metal parts and the support of wires adjacent to the wiring terminations shall be evaluated by the standard
covering the specific equipment involved.

4.2 A connector shall comply with Materials, Section 5; the dimensional requirements of 6.1; and the test
requirements of Sections 8 – 14 when the connector is tested in conjunction with a test tab complying with
5.2 and 6.3.

4.3 A production tab shall comply with Materials, Section 5; the dimensional requirements of 6.2; and the
test requirements of Sections 8 – 14.

5 Materials

5.1 Connectors and production tabs

5.1.1 A connector or a production tab shall be made of plain or plated copper alloy, nickel, or nickel alloy.

Exception: A connector or a production tab may be plated steel or unplated steel of a corrosion-resistant
alloy if the connector or tab is intended for use in an appliance or equipment where such construction is
permitted.

5.1.2 A formed connector or a production tab that has been sheared and is provided on a continuous strip
that is intended to be fed into a tool for crimping and separating from the strip need not be plated on the
edge of the connector or tab where it was originally attached to the strip.
MAY 27, 2003 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 9

5.2 Test tab

5.2.1 Test tabs used in the mechanical tests, Crimp Pull-Out Test, Section 10, and
Engagement-Disengagement Test, Section 11, shall be made of unplated brass, identified as C26000
Alloy.

5.2.2 Test tabs for the Temperature and Heat Cycling Tests, Section 12, shall be made of tin-plated steel
or corrosion resistant steel having a hardness of 68 ±5 on the Rockwell 30T scale.

Exception: For connectors intended exclusively for use with production tabs of copper alloy, an unplated
brass test tab of C26000 Alloy may be used.

5.2.3 The hardness of a brass test tab shall be 62 ±7 on the Rockwell 30T scale.

6 Dimensions

6.1 General

6.1.1 A connector shall have the configuration illustrated in Figure 6.1 and the dimensions specified in
Table 6.1.

This is generated text for figtxt.

Figure 6.1
Envelope configuration of connectors
10 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MARCH 8, 2005

Table 6.1
Dimensions of connectors

Dimensions, inch (mm)

Tab width, N P Q
nominal Maximum Maximum Maximum

0.250 (6.3) 0.320 (8.13) 0.140 (3.56) 0.370 (9.40)

0.205 (5.2) 0.270 (6.86) 0.140 (3.56) 0.315 (8.00)
0.187 (4.8) 0.270 (6.86) 0.140 (3.56) 0.315 (8.00)
0.125 (3.2) 0.180 (4.57) 0.140 (3.56) 0.290 (7.37)
0.110 (2.8) 0.180 (4.57) 0.140 (3.56) 0.290 (7.37)

6.2 Production tab

6.2.1 A production tab shall have the configuration shown in Figures 6.2 – 6.4 and the dimensions
specified in Table 6.2 and Table 6.3. Figure 6.3 shows dimensions of dimple detents and Figure 6.4
provides dimensions of hole detents.

Exception: A production tab may have alternate dimensions from those contained in Figures 6.2 – 6.4
and Table 6.2 and Table 6.3 if the tab is intended for use in an appliance or equipment that complies with
the requirements for such appliance or equipment and is performance tested with a specific mating
connector.
6.2.1 revised March 8, 2005

Thisisgeneratedtextforfigtxt.
MARCH 8, 2005 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 11

Figure 6.2
Dimensions of production and test tabs
Figure 6.2 revised March 8, 2005
12 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MAY 27, 2003

Figure 6.3
Dimensions of dimple detents
MAY 27, 2003 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 13

Figure 6.4
Dimensions of hole detents

Table 6.2
Dimensions of production and test tabs in inches

Nominal size A B(min) C D E1 E2 F J M N P Q(min)

0.110 x 0.020 0.024 0.021 0.114 0.071 0.221 0.051 12° 0.067 0.055 0.055
with dimple
0.012 0.275 0.019 0.106 0.051 0.215 0.043 8° 0.055 0.039 0.012 0.319
0.110 x 0.020 0.024 0.021 0.114 0.071 0.221 0.051 12° 0.055
with hole
0.012 0.275 0.019 0.106 0.051 0.215 0.043 8° 0.012 0.319
0.110 x 0.032 0.024 0.033 0.114 0.071 0.221 0.051 12° 0.067 0.055 0.055
with dimple
0.012 0.275 0.030 0.106 0.051 0.215 0.043 8° 0.055 0.039 0.012 0.319
0.110 x 0.032 0.024 0.033 0.114 0.071 0.221 0.051 12° 0.055
with hole
0.012 0.275 0.030 0.106 0.051 0.215 0.043 8° 0.012 0.319
0.125 x 0.032 0.025 0.033 0.128 0.070 0.221 0.051 12° 0.067 0.053 0.055
with dimple
0.015 0.275 0.031 0.122 0.056 0.215 0.045 8° 0.057 0.043 0.015 0.320
0.125 x 0.032 0.025 0.033 0.128 0.070 0.221 0.051 12° 0.055
with hole
0.015 0.275 0.031 0.122 0.056 0.215 0.045 8° 0.015 0.320
0.125 x 0.020 0.025 0.021 0.128 0.070 0.221 0.051 12° 0.067 0.053 0.055
with dimple
0.015 0.275 0.019 0.122 0.056 0.215 0.045 8° 0.057 0.043 0.015 0.320
0.125 x 0.020 0.025 0.021 0.128 0.070 0.221 0.051 12° 0.055
with hole
0.015 0.275 0.019 0.122 0.056 0.215 0.045 8° 0.015 0.320
0.187 x 0.020 0.035 0.021 0.190 0.110 0.153 0.060 12° 0.067 0.059 0.067
with dimple
0.024 0.244 0.019 0.181 0.091 0.147 0.050 8° 0.055 0.047 0.024 0.287

Table 6.2 Continued on Next Page

14 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MAY 27, 2003

Table 6.2 Continued

Nominal size A B(min) C D E1 E2 F J M N P Q(min)

0.187 x 0.020 0.035 0.021 0.193 0.134 0.128 0.060 12° 0.067
with hole
0.024 0.244 0.019 0.184 0.117 0.122 0.050 8° 0.024 0.287
0.187 x 0.032 0.040 0.033 0.190 0.110 0.153 0.060 12° 0.067 0.059 0.071
with dimple
0.027 0.244 0.030 0.181 0.091 0.147 0.050 8° 0.055 0.047 0.027 0.287
0.187 x 0.032 0.040 0.033 0.193 0.134 0.128 0.060 12° 0.071
with hole
0.024 0.244 0.030 0.184 0.117 0.122 0.050 8° 0.027 0.287
0.205 x 0.020 0.040 0.021 0.210 0.110 0.153 0.075 12° 0.098 0.080 0.067
with dimple
0.027 0.244 0.019 0.201 0.091 0.147 0.063 8° 0.086 0.070 0.024 0.287
0.205 x 0.020 0.040 0.021 0.210 0.134 0.128 0.075 12° 0.067
with hole
0.027 0.244 0.019 0.201 0.117 0.122 0.063 8° 0.024 0.287
0.205 x 0.032 0.040 0.033 0.210 0.110 0.153 0.075 12° 0.098 0.080 0.071
with dimple
0.027 0.244 0.030 0.201 0.091 0.147 0.063 8° 0.086 0.070 0.027 0.287
0.205 x 0.032 0.040 0.033 0.210 0.134 0.128 0.075 12° 0.071
with hole
0.027 0.244 0.030 0.201 0.117 0.122 0.063 8° 0.027 0.287
0.250 x 0.032 0.040 0.033 0.253 0.161 0.163 0.080 12° 0.098 0.080 0.071
with dimple
0.027 0.307 0.030 0.244 0.142 0.157 0.063 8° 0.086 0.070 0.027 0.350
0.250 x 0.032 0.040 0.033 0.253 0.186 0.137 0.080 12° 0.071
with hole
0.020 0.307 0.030 0.244 0.169 0.131 0.063 8° 0.027 0.350

Note: Included are dimensions for those nominal sizes corresponding with those found in the International Standard for Connecting
Devices – Flat Quick-Connect Terminations for Electrical Copper Conductors – Safety Requirements, IEC 61210.

6.2.2 All portions of a production tab shall be flat, its surfaces not deviating more than 0.010 inch/inch
(0.010 mm/mm) and free from objectionable burrs, no greater than 10 percent of tab thickness, or raised
plateaus.

Exception: In an area 0.050 inch (1.3 mm) surrounding the detent, a raised plateau over the stock
thickness of 0.001 inch (0.03 mm) per side is acceptable.

6.2.3 For an optional shoulder, the minimum dimension shall be 0.045 inch (1.14 mm). See dimension
″K″ of Figure 6.2. There shall not be any obstructions within 0.045 inch (1.14 mm) of the ″K″ dimension
end of the area defined by dimension ″B.″

6.2.4 If the detent is located with reference to a shoulder, it shall be located on the tab in accordance with
dimension ″E2.″ If no shoulder is used, the detent shall be located on the tab in accordance with
dimension ″E1.″ The center of a hole or detent shall be within 0.003 inch (0.08 mm) of the centerline of
the tab. The depth of a dimple, dimension ″G″ on Figure 6.3, shall not be less than 0.003 inch (0.08 mm).

6.2.5 Bevel ″H″ shall be approximately 45 degrees. See Note Two to Figure 6.2.
MARCH 8, 2005 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 15

6.2.6 Dimensional measurements shall not include plating, burrs, or flatness tolerance.

6.3 Test tab

6.3.1 Single-ended test tabs shall have the configuration shown in Figures 6.2 – 6.4 and the dimensions
specified in Table 6.2 and Table 6.3. The ″C″ dimension tolerance shall be ±0.0003 inch (0.008 mm) for
brass and ±0.0005 inch (0.013 mm) for steel, and raised plateaus around the detent shall be limited to a
total of 0.001 inch (0.03 mm) for both sides.
6.3.1 revised March 8, 2005

6.3.2 Double-ended test tabs for the temperature and heat cycling tests shall have the configuration
shown in Figure 6.5.

This is generated text for figtxt.

Figure 6.5
Double-ended test tab for temperature rise and heat cycling tests
Figure 6.5 revised March 8, 2005

(See Figures 6.2 – 6.4 and Tables 6.2 or 6.3)

Table 6.3
Dimensions of metric production and test tabs in millimeters

Nominal size A B(min) C D E1 E2 F J M N P Q(min)

2.8 x 0.5 with 0.6 0.54 2.90 1.8 5.61 1.3 12° 1.7 1.4 1.4
dimple
0.3 7.0 0.47 2.70 1.3 5.46 1.1 8° 1.4 1.0 0.3 8.1
2.8 x 0.5 with 0.6 0.54 2.90 1.8 5.61 1.3 12° 1.4
hole
0.3 7.0 0.47 2.70 1.3 5.46 1.1 8° 0.3 8.1
2.8 x 0.8 with 0.6 0.84 2.90 1.8 5.61 1.3 12° 1.7 1.4 1.4
dimple
0.3 7.0 0.77 2.70 1.3 5.46 1.1 8° 1.4 1.0 0.3 8.1

Table 6.3 Continued on Next Page

16 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MAY 27, 2003

Table 6.3 Continued

Nominal size A B(min) C D E1 E2 F J M N P Q(min)

2.8 x 0.8 with 0.6 0.84 2.90 1.8 5.61 1.3 12° 1.4
hole
0.3 7.0 0.77 2.70 1.3 5.46 1.1 8° 0.3 8.1
3.2 x 0.8 with 0.6 0.84 3.25 1.8 5.61 1.3 12° 1.7 1.4 1.4
dimple
0.3 7.0 0.79 3.10 1.4 5.46 1.1 8° 1.4 1.1 0.3 8.1
3.2 x 0.8 with 0.6 0.84 3.25 1.8 5.61 1.3 12° 1.4
hole
0.3 7.0 0.79 3.10 1.4 5.46 1.1 8° 0.3 8.1
3.2 x 0.5 with 0.6 0.54 3.25 1.8 5.61 1.3 12° 1.7 1.4 1.4
dimple
0.3 7.0 0.48 3.10 1.4 5.46 1.1 8° 1.4 1.1 0.3 8.1
3.2 x 0.5 with 0.6 0.54 3.25 1.8 5.61 1.3 12° 1.4
hole
0.3 7.0 0.48 3.10 1.4 5.46 1.1 8° 0.3 8.1
4.8 x 0.5 with 0.9 0.54 4.80 2.8 3.89 1.5 12° 1.7 1.5 1.7
dimple
0.6 6.2 0.47 4.60 2.3 3.73 1.3 8° 1.4 1.2 0.6 7.3
4.8 x 0.5 with 0.9 0.54 4.90 3.4 3.25 1.5 12° 1.7
hole
0.6 6.2 0.47 4.67 3.0 3.10 1.3 8° 0.6 7.3
4.8 x 0.8 with 1.0 0.84 4.80 2.8 3.89 1.5 12° 1.7 1.5 1.8
dimple
0.7 6.2 0.77 4.60 2.3 3.73 1.3 8° 1.4 1.2 0.7 7.3
4.8 x 0.8 with 1.0 0.84 4.90 3.4 3.25 1.5 12° 1.8
hole
0.6 6.2 0.77 4.67 3.0 3.10 1.3 8° 0.7 7.3
5.2 x 0.5 with 1.0 0.54 5.30 2.8 3.89 1.9 12° 2.5 2.0 1.7
dimple
0.7 6.2 0.47 5.10 2.3 3.73 1.6 8° 2.2 1.8 0.6 7.3
5.2 x 0.5 with 1.0 0.54 5.30 3.4 3.25 1.9 12° 1.7
hole
0.7 6.2 0.47 5.10 3.0 3.10 1.6 8° 0.6 7.3
5.2 x 0.8 with 1.0 0.84 5.30 2.8 3.89 1.9 12° 2.5 2.0 1.8
dimple
0.7 6.2 0.77 5.10 2.3 3.73 1.6 8° 2.2 1.8 0.7 7.3
5.2 x 0.8 with 1.0 0.84 5.30 3.4 3.25 1.9 12° 1.8
hole
0.7 6.2 0.77 5.10 3.0 3.10 1.6 8° 0.7 7.3
6.3 x 0.8 with 1.0 0.84 6.40 4.1 4.14 2.0 12° 2.5 2.0 1.8
dimple
0.7 7.8 0.77 6.20 3.6 3.99 1.6 8° 2.2 1.8 0.7 8.9
6.3 x 0.8 with 1.0 0.84 6.40 4.7 3.48 2.0 12° 1.8
hole
0.5 7.8 0.77 6.20 4.3 3.33 1.6 8° 0.7 8.9

Note: Included are dimensions for those nominal sizes corresponding with those found in the International Standard for Connecting
Devices – Flat Quick-Connect Terminations for Electrical Copper Conductors – Safety Requirements, IEC 61210.
MARCH 8, 2005 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 17

7 Insulation

7.1 Insulation provided as a part of a terminal shall be porcelain, cold-molded or phenolic composition, or
other material rated for the purpose.

7.2 Insulation provided as a part of a terminal shall be rated for operation at one of the temperatures
specified in Table 7.1.

Table 7.1
Maximum operating temperature for insulating material
Table 7.1 revised March 8, 2005

Material Temperature

°C (°F)
Thermoplastica 60 (140)
75 (167)
90 (194)
105 (221)
150 (302)
Phenolicb 150 (302)
Ureac 100 (212)
Melamined 130 (266)
Melaminee 150 (302)
a Temperature rating is the Relative Thermal Index (RTI) as rated by the insulation manufacturer or a rating as assigned by

the connector manufacturer.

b Composition may be filled or unfilled.
c Unless the compound has been tested for use at a higher temperature.
d Composition with a specific gravity less than 1.55.
e Composition with a specific gravity 1.55 or more. The compound may have cellulosic filler material.

7.3 The insulating material is able to have a flammability classification as determined by tests described
in the Standard for Test for Flammability of Plastic Materials for Parts in Devices and Appliances, UL 94.
See 16.9.
7.3 revised March 8, 2005

7.4 Insulation consisting of natural or Styrene Butadiene Rubber (SBR) or a thermoplastic material shall
be subjected to an investigation to verify that it meets the intent of this standard.

7.5 Porcelain or cold-molded composition used as electrical insulation shall additionally comply with the
Moisture Absorption Test, Section 15.
18 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MARCH 8, 2005

PERFORMANCE

8 General

8.1 A connector and a production tab shall be in compliance with the requirements of the Crimp Pull-Out
Test, Section 10.

8.2 A connector shall be in compliance with the requirements of the Engagement-Disengagement Test,
Section 11 and the Temperature and Heat Cycling Tests, Section 12.

Exception: The Disengagement portion of the Engagement-Disengagement Test need not be performed
on connectors that have a locking feature.

8.3 Compliance of a connector shall be based on the use of test tabs. A double-ended test tab shall be
used for temperature and heat cycling tests. A single-ended test tab shall be used for all mechanical tests
in this standard.

8.4 Insulated terminals shall additionally be in compliance with the requirements of the Dielectric Strength
Tests, Section 13, and Secureness of Insulation Test, Section 14.

8.5 The insulation of a terminal shall not crack or break when the terminal is assembled as intended on
an insulated wire or wires.

8.6 A terminal that is intended for both field terminations of conductors and internal wiring connections
shall be tested using the wires specified in 9.3 and 9.4.

9 Preparation of Samples

9.1 To determine if a terminal complies with the requirements in 8.1, representative samples of the
terminal shall be assembled to lengths of wire or wires of the size or sizes and in the manner specified by
the manufacturer, see 16.7.

9.2 For the Crimp Pull-Out Test, Section 10, and the Engagement-Disengagement Test, Section 11, ten
new connectors and ten new single-ended test tabs shall be used for each test. For the Temperature and
Heat Cycling Tests, Section 12, ten new connectors and five new double-ended test tabs shall be used.
Additional connectors and tabs are necessary to complete the test circuit illustrated in Figure 12.1.
9.2 revised March 8, 2005

9.3 Tin-plated wire with stranding, as specified in Table 9.1 under the heading ″internal wiring″ shall be
used for tests on a terminal intended only for internal wiring connections. The wire shall have
thermoplastic insulation not greater than 1/32 inch (0.8 mm) thick.
MAY 27, 2003 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 19

Table 9.1
Number of strands for test wire

Number of strands
AWG (mm2 ) Internal wiringa Field terminationsb
22 (0.32) 7 7
20 (0.52) 10 10
18 (0.82) 16 16
16 (1.3) 26 26
14 (2.1) 41 7
12 (3.3) 65 7
10 (5.3) 105 7

a See 9.3.
b See Exception to 9.4.

9.4 A terminal intended for field termination of conductors shall be tested with insulated solid wire. See
Table 9.2 for insulation type.

Exception: Stranded conductors with stranding as specified in Table 9.1 and Table 9.2 meets the intent
of 9.4 when marked in accordance with 16.6.

Table 9.2
Test wire stranding and insulation type

Wire size, AWG (mm2 ) Solid Stranded

14 – 10 (2.1 – 5.3) Soft annealed-untinned type XHHW, Concentric or compressed Class B

USE, or THW stranding, soft annealed-untinned, Type
XHHW, USE, or THW
18 – 16 (0.82 – 1.3) Untinned, thermoplastic insulation not Untinned, thermoplastic insulation not
greater than 1/32 inch (0.8 mm) thick greater than 1/32 inch (0.8 mm) thick
22 – 20 (0.32 – 0.52) Tinned or untinned, thermoplastic Tinned or untinned, thermoplastic
insulation insulation

9.5 The wire shall be stripped so that the wire remains intact and then twisted to its original shape before
it is assembled to the terminal.

9.6 If a specific type of tool is necessary to obtain a proper installation, it shall be used in assembling the
terminal to the wire or wires. If a terminal is designed to be assembled to a wire or wires by means of
more than one type of tool, the terminal shall comply with the tests after any intended tool is used in the
assembly operation.

9.7 With reference to 9.6, the tools used for assembly of a terminal to a conductor must be selected on
the basis of:

a) Profile, width, and depth of the terminal;

b) Material of the terminal body;

c) Crimping die geometry;

d) The number of crimps; and

20 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MARCH 8, 2005

e) Similarity of crimp forces.

9.8 For an insulated terminal marked with a nominal strip length in accordance with 16.8, the dielectric
strength tests shall be conducted with wires stripped to the maximum tolerance specified in Table 9.3.

Table 9.3
Strip-length tolerances for wires

Wire size Tolerance

AWG (mm2) inch (mm)

22 – 14 (0.32 – 2.1) ± 1/32 (0.80)

12 – 10 (3.3 – 5.3) ± 3/64 (1.2)

9.9 For an insulated terminal marked with a maximum wire-strip length and a minimum wire-strip length
in accordance with 16.8, the dielectric strength tests shall be conducted with the wires stripped to the
maximum length specified by the manufacturer.

10 Crimp Pull-Out Test

10.1 A connector or a production tab, when subjected to a force as specified in Table 10.1, shall not
separate from the wire or wires to which it is assembled.

Table 10.1
Forces for crimp pull-out test

Wire size Minimum force

AWG (mm2) pounds (N)

22 (0.32) 8 (36)
20 (0.52) 13 (58)
18 (0.82) 20 (89)
16 (1.3) 30 (133)
14 (2.1) 50 (223)
12 (3.3) 70 (311)
10 (5.3) 80 (356)

10.2 A connector or a production tab intended for use with wires of more than one size or a range of sizes
shall be subjected to the test specified in 10.1 for each combination of connector or tab with a wire of each
size or range of sizes. A connector designed for use with two simultaneously crimped conductors shall be
tested with the conductor combination constituting the minimum circular cross-sectional area (CMA) and
the conductor combination constituting the maximum circular cross-sectional area. When the connector or
tab has a conductor insulation support, it shall be first rendered mechanically inactive for this test.

10.3 When a connector or a production tab is intended to secure two wires simultaneously, the assembly
shall be suspended from the wire of the largest size in each sample, and the specified force shall be
applied to the other wire. The value of the force shall be selected according to the size of the wire to which
it is applied.
MAY 27, 2003 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 21

10.4 The force shall be applied gradually by means of a tensile testing machine. The head of the tensile
testing machine shall be adjusted to travel at a speed of 1 inch/min. (25.4 mm/min) until the specified
minimum required force is obtained. The test sample shall then be held at the minimum required force for
one minute.

11 Engagement-Disengagement Test

11.1 The forces required to engage and disengage a connector shall be in accordance with Table 11.1
for the number of insertions and withdrawals indicated.

Table 11.1
Insertion and withdrawal forces for engagement-disengagement test

Force, pounds (N)

First withdrawal Sixth withdrawal

First insertion, Minimum Minimum
maximum
Tab size, inch (mm) individual Maximum Average Individual Average Individual

Test tab and unplated

connector
0.250 (6.3) 18 (80) 18 (80) 6 (27) 4 (18) 5 (22) 4 (18)
0.205 (5.2) and 0.187 (4.8) 15 (67) 20 (89) 5 (22) 3 (13) 3 (13) 2 (9)
0.125 (3.2) and 0.110 (2.8) 12 (53) 14 (62) 3 (13) 2 (9) 2 (9) 1 (4)
Test tab and tin-plated
connector
0.250 (6.3) 17 (76) 17 (76) 5 (22) 3 (13) 4 (18) 3 (13)
0.205 (5.2) and 0.187 (4.8) 15 (67) 20 (89) 5 (22) 3 (13) 3 (13) 2 (9)
0.125 (3.2) and 0.110 (2.8) 12 (53) 14 (62) 3 (13) 2 (9) 2 (9) 1 (4)

11.2 The force shall be measured with a testing device capable of holding the reading, and providing
accurate alignment with slow and steady engagement and disengagement of the connector and test tab.

12 Temperature and Heat Cycling Tests

12.1 General

12.1.1 A connector designed for wire of only one size shall be tested with wire of that size.

12.1.2 A connector designed for wire with a range of sizes shall be tested with wires of both the maximum
and minimum sizes in the range. A connector designed for use with two stranded conductors shall be
tested with both the minimum and maximum wire sizes.

12.1.3 New connectors shall be crimped in the intended manner on both ends of 6-1/2 inch (165 mm)
lengths of tin-plated copper wire of the size and type specified in 9.3, 9.4, or Exception to 9.4, as
applicable. The method of preparation shall be as described in 9.6 – 9.9. The assembly shall be arranged
and connected as illustrated in Figure 12.1 and Figure 12.2. The wire size for the power-supply leads and
circuit-continuation wire shall be the same as that specified for the test.

This is generated text for figtxt.

22 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MAY 27, 2003

Figure 12.1
Connection and arrangement for temperature and heat cycling tests

Dimension in mm

A 16 400
B 12 300
C 12 300
D 4 100
E 14 350

Figure 12.2
Thermocouple location on connectors
MAY 27, 2003 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 23

12.1.4 The tests described in 12.2.1 and 12.3.1 – 12.3.2 shall be conducted in a location where the air
flow does not exceed 25 ft/min (0.12 m/s) and under the conditions described in 12.1.5 – 12.1.7.

12.1.5 The test shall be conducted at an ambient temperature of 25 ±5°C (77 ±9°F). The temperature
rises specified in 12.2.1 and 12.3.1 shall be the observed temperatures of the connector minus the
observed ambient temperature.

12.1.6 Any 60 Hz voltage that will result in an essentially sinusoidal current of the specified value flowing
through the connector meets the intent of this requirement.

12.1.7 The temperature shall be measured with thermocouples consisting of 30 AWG iron and
constantan wires. The thermocouples and related instruments shall be calibrated to take consistently
accurate measurements. Each thermocouple shall make contact with the surface being tested and shall
not be relocated during the tests. A temperature shall be stable when three successive readings taken at
intervals of 5 minutes indicate no further rise above the ambient temperature. A terminal does not meet
the intent of this requirement when any one of the measured connector temperatures show a rise of more
than those specified in 12.2 and 12.3.

12.2 Temperature test

12.2.1 The temperature rise of a connector shall not exceed 30°C (54°F) when the connector is
continuously conducting the current specified in Table 12.1 or Table 12.2, as applicable.

Table 12.1
Test current for temperature and heat cycling tests for connectors intended for internal wiring
only

Test current, amperes

Wire size, Temperature Heat cycling
0.110 inch (2.8 mm) and 0.125 0.110 inch (2.8 mm) and 0.125
AWG (mm2 ) inch (3.2 mm) terminals All others inch (3.2 mm) terminals All others
22 (0.32) 2 3 4 6
20 (0.52) 3 4 6 8
18 (0.82) 4 7 8 14
16 (1.3) 5 10 10 20
14 (2.1) 15 30
12 (3.3) 20 40
10 (5.3) 24 48
24 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MAY 27, 2003

Table 12.2
Test current for connectors intended for field termination of conductors

Wire size, Test current, amperes

AWG (mm2 ) Continuous operation Heat cycling

22 (0.32) 3 6
20 (0.52) 5 10
18 (0.82) 7 14
16 (1.3) 10 20
14 (2.1) 15 30
12 (3.3) 20 40
10 (5.3) 30 60

12.3 Heat cycling

12.3.1 After operation as described in 12.3.2, the temperature rise of a connector during the 500th cycle
shall not be more than 15°C (27°F) higher than the temperature rise during the 24th cycle, and neither
rise shall be more than 85°C (153°F).

12.3.2 After the continuous operation described in 12.2.1, the same samples shall be subjected to a 500
cycle test with a current as specified in Table 12.1 or Table 12.2, as applicable. Each cycle shall consist
of full current for 45 minutes, followed by a 15 minute period during which no current flows. The full current
portion of the cycle, during which temperature measurements are made, is capable of being extended to
longer than 45 minutes, when necessary, to enable the connector to attain thermal stabilization. In such
cases, the time of 45 minutes is not to be prolonged more than necessary for the temperature to stabilize.

13 Dielectric Strength Tests

13.1 General

13.1.1 No sample shall be subjected to more than one dielectric strength test.

13.1.2 For a terminal intended to be secured to combinations of conductors of different total

cross-sectional area, or single conductors of different AWG sizes, the entire specified series of tests is to
be repeated. For one series, samples of the terminal are to be secured to the combination of conductors
of the smallest total cross-sectional area, or to the smallest conductor, if only one conductor is intended
to be secured; and for the second series the samples are to be secured to the combination of largest total
cross-sectional area, or to the largest conductor if only one wire is intended to be secured.
MAY 27, 2003 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 25

13.2 Insulation puncture test

13.2.1 An insulated terminal shall withstand an insulation puncture test in accordance with the
requirements of 13.2.2 – 13.2.4 and Table 13.1.

Table 13.1
Samples required for insulation puncture test

Insulating material Number of samplesa

Thermosetting, for example, porcelain, or cold-molded melamine, phenolic,

or urea-compound:
Test as received only 6
Thermoplastic, for example, vinyl or nylon:
Test as received 6
Test after oven aging, with samples assembled to wire before 6
such agingb
Test after oven aging, with samples assembled to wire after 6
such agingc
a See 13.1.2.
b See 13.2.3.
c See 13.2.4.

13.2.2 The tests to be conducted and the number of samples for each test are to be as specified in Table
13.1. The test potential is to be 2200 volts for a terminal rated 300 volts and is to be 3400 volts for a
terminal rated 600 volts – 1000 volts for signs and luminaires (lighting fixtures). Each sample is to be
assembled to a conductor or conductors in the intended manner, and the test potential is to be applied for
1 minute between conductor or conductors and the outer electrode. Each sample is to be embedded in
No. 7-1/2 conductive shot that is to serve as the outer electrode. Only that portion of the outer insulating
surface that covers live parts is to be covered with the outer electrode. An insulated terminal that has
openings for the entrance of shot, thereby allowing for flashover, is to have those openings closed with
tape, petrolatum, epoxy, silicone, rubber, or other comparable material; and the exposed tang of an
insulated terminal is to be similarly treated. The supplementary insulating material is not to be applied so
as to supplement the terminal insulation where it covers live parts. Puncture of the conductor insulation
during this test renders the insulation non-compliant. When flashover between the electrode and the
insulated terminal occurs, the supplementary insulation is to be repaired and the test is to be repeated.

Exception No. 1: A smaller (higher size number) shot may be used with concurrence of those concerned.

Exception No. 2: For an insulated terminal employing a separable cap that is applied after assembly of
the terminal to the conductor and has openings that cannot be effectively closed to prevent entry of the
shot, metal foil closely applied to the outer surface of the insulation may be used as the outer electrode.

13.2.3 Samples previously assembled to a wire shall be conditioned in an air-circulating oven, in

accordance with Table 13.2. When the insulation is a material other than those mentioned in Table 13.1,
a test program shall be developed.
26 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MARCH 8, 2005

Table 13.2
Temperatures for oven conditioning
Table 13.2 revised March 8, 2050

Rated temperature of connector insulation Oven temperature

7-day test Optional 60-day test
°C (°F) °C (°F) °C (°F)
60 (140) 100 (212) 70 (158)
75 (167) 113 (235) 81 (178)
90 (194) 121 (250) 97 (207)
105 (221) 136 (277) 113 (235)
125 (257) 158 (316) 133 (271)
150 (302) 180 (356) 158 (316)

13.2.4 Samples not previously assembled to conductors shall be conditioned for 168 hours in an
air-circulating oven at 100°C (212°F). Connectors employing extended covers or sleeves are capable of
having the wires pre-inserted, and not crimped, prior to the oven aging. The samples shall be allowed to
cool to room temperature. When the insulation is of a hygroscopic material such as nylon, samples shall
be subjected to conditioning at a relative humidity of 85 ±5% at 30 ±2°C (86 ±4°F) for 24 hours. After
conditioning, the samples shall be assembled or crimped to a conductor in the intended manner.

13.2.5 The oven-conditioning described in 13.2.3 and 13.2.4 and Table 13.2, shall not cause the
insulation on a terminal to harden, soften, crack, deform, loosen, or otherwise change so as to adversely
affect the insulating properties. Discoloration of the insulation is allowed.

Exception: At the manufacturer’s option, the oven conditioning may be conducted for 60 days as
indicated in Table 13.2.

13.3 Flashover (Type A)

13.3.1 Deleted March 8, 2005

Table 13.3
Voltages for flashover test
Table 13.3 deleted March 8, 2005

13.3.2 Deleted March 8, 2005

MARCH 8, 2005 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 27

13.4 Flashover
13.4 Title revised March 8, 2005

13.4.1 Six samples shall be tested in the as-received condition. Each sample not assembled to a wire or
wires shall be placed on a flat metal plate in a position having the highest probability to result in
breakdown to the open end when the test voltage is applied between the metal plate and all insulated
metal parts of the terminal. A test voltage of 1600 V for a terminal rated 300 V and 3000 V for a terminal
rated 600 V [1000 V in signs and lighting fixtures (luminaries)] shall be applied for 1 minute. A breakdown
(flashover) does not meet the intent of this requirement.

14 Secureness of Insulation Test

14.1 General

14.1.1 A temporary distortion of flexible insulating material during the tests is allowed. Tearing or breaking
of the insulation meets the intent of this standard when the terminal complies with the dielectric strength
test. The variety of designs of terminals is such that it is not practicable to specify in detail how the force
is to be applied. The arrangement shall be such that the tendency for the insulation to be damaged or to
be separated from the body is greatest. Flexible insulation, when installed on a terminal after assembly to
a wire or wires, shall be allowed to regain its normal shape before the test.

14.2 Terminals with insulation other than the tubular sleeve type

14.2.1 Deleted March 8, 2005

14.3 Terminals with insulation

14.3.1 Insulation on terminals intended for use with 10 AWG or smaller conductors shall not be damaged
and shall not become detached from the terminal when a force is applied for 1 minute between the
insulation and the terminal.
14.3.1 revised March 8, 2005

14.3.2 To determine compliance with 14.3.1:

a) A 1-pound (4.5 N) force shall be applied to the following:

1) An unassembled, as-received sample; and

2) A sample that has been assembled to the conductor before oven conditioning in
accordance with Table 13.2;

b) A 5-pound (22.3 N) force shall be applied to the following:

1) An assembled, as-received sample;

2) A sample that has been assembled to the conductor before oven conditioning in
accordance with Table 13.2; and

3) A sample that has been assembled to the conductor after conditioning for 7 days at
100 ±1°C (212 ±2°F) in an air-circulating oven, then cooling to room temperature, and
when the insulation is of a hygroscopic material, such as nylon, conditioning for 24
hours at a relative humidity of 85 ±5% at a temperature of 30 ±2°C (86 ±4°F).
28 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MARCH 8, 2005

15 Moisture-Absorption Test

15.1 Porcelain or cold-molded composition used as insulation on connectors or tabs shall not absorb
more than 3 percent of its weight when tested as described in 15.2.

15.2 Samples used for the Moisture Absorption Test are to be clean and dry. Each connector insulator or
tab insulator is to be broken, weighed, and then submerged in distilled water at room temperature for 24
hours. After removal from the water, the broken insulator is to be dried with a soft cloth to remove all
surface water and immediately reweighed.

MARKING

16 Marking

16.1 Each terminal shall be marked with the manufacturer’s name, trademark, or other descriptive
marking by which the organization responsible for the product is identifiable.

16.2 The smallest container, reel, or packaging carton containing terminals shall be legibly and
permanently marked with:

a) The manufacturer’s name, trade name, or trademark;

Exception: The manufacturer’s identification is capable of being in a traceable code when

identified by a brand or a trademark owned by a private labeler.

b) A distinctive catalog, model number, or the equivalent;

c) The wire size or sizes rated for single-wire application and the minimum and maximum AWG
wire sizes rated for two-wire application;

d) A statement referring to the manufacturer’s installation instructions if such separate

instructions are needed;

e) A statement indicating that the terminals are intended for internal wiring of electrical
equipment, for field termination of conductors, or for both;

f) A statement informing the end-use manufacturer that when the terminals are to be used for
field termination of conductors to electrical equipment, such equipment is to be provided with
strain relief, and is to be marked with instructions for effecting the strain relief and providing
reference to the specific terminals to be used; and

g) A statement indicating that the terminals are intended for termination of copper wire only –
for example, ″copper wire only ″ or equivalent wording.

Exception: For terminals not capable of terminating a wire, such as printed circuit mounted items,
the container, reel, or packaging carton need not be marked that the terminals are suitable for
termination of copper wire only.
MARCH 8, 2005 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 29

16.3 The voltage rating for each insulated terminal shall be marked on the terminal or on the smallest unit
container. The marked voltage rating, shall be: ″300 V maximum,″ ″600 V maximum,″ or ″600 V maximum
building wiring; 1000 V maximum signs or luminaires (lighting fixtures)″ or equivalent.

Note: The words ″lighting fixtures″ and ″luminaires″ are interchangeable.

16.4 The maximum operating temperature for which an insulated terminal is rated, in accordance with
Table 7.1, shall be marked on the terminal.

16.5 When a manufacturer produces terminals at more than one factory, each terminal or the smallest
packaging carton shall have a distinctive marking by which it is identifiable as the product of a particular
factory.

16.6 When a terminal intended for field termination of conductors is tested with stranded wire as
specified in the Exception to 9.4, the wire size – see 16.2(c) – shall be followed by ″STRANDED″ or
″STR.″

16.7 The method of rearrangement or adjustment of a terminal to adapt it to various sizes of wire shall be
indicated clearly, when it is not obvious, by size markings or other instructions appearing on the terminal
or the appropriate packaging unit noted in 16.2.

16.8 The minimum and maximum wire strip length marking for an insulated terminal is specifiable as a
single (nominal) value as indicated in 9.8. The marking shall appear:

a) On or in the smallest unit container in which the terminal is packed;

b) On the terminal; or

c) On an insulating cover.

Exception No. 1: The marking on a terminal is not required when the end opposite the wire insertion end
is open, and the end of the wire is visible after it is connected.

Exception No. 2: The minimum strip length marking is not required when a terminal is provided with an
inspection hole opposite the wire insertion end through which the end of the wire is visible after it is
connected.

16.9 The manufacturer is able to mark the flammability classification of the insulating material on the
connector, smallest unit container, or on an information sheet placed in the smallest unit container. See
7.3.
30 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MARCH 8, 2005

INSTRUCTIONS

17 Installation Instructions

17.1 Installation instructions shall be provided and shall include the following features as applicable to the
procedure for assembly of a terminal to one or two wires:

a) For a terminal intended to be assembled to a wire or wires by means of a specific type of

tool, the tool designation or the designation of a removable tool part such as a pressing die
shall be marked on or in the container in which the terminal is packed and shall be identified by
the catalog designation, color coding, die index number, or other equivalent means;

b) Instructions for preparation of the wires, such as twisting strands together before assembly,
shall appear on or in the container in which the terminal is packed; and

c) The minimum and maximum wire strip length marking for an insulated terminal shall appear
as specified in 16.8.
17.1 revised March 8, 2005
MAY 27, 2003 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 A1

APPENDIX A – MILLIVOLT DROP TEST

A1 General

A1.1 Appendix A provides for optional millivolt drop tests that may be conducted with the Heat Cycling
Test as described in 12.3.1 and 12.3.2. These measurements are not a requirement but may be used for
design analysis.

A2 Millivolt Drop Test

Values and methods from this appendix are provided for informative purposes, only.

A2.1 The samples subjected to 500 cycles of operation in the Heat Cycling Test described in 12.3.1 and
12.3.2 may also have the following data taken after 24 hours and at the completion of 500 hours.

a) Millivolt drop from the stripped portion of the lead to the reference point on the tab
(measurement ″A″ in Figure 12.2).

b) Millivolt drop across a 1-foot section of lead wire (measurement ″B″ in Figure 12.1).

A2.2 For the measurements, reference points (dots) are to be marked on each double-ended tab at the
locations shown in Figure 12.2. A 1/4-inch (8-mm) section in the center of the lead assembly is to be
stripped and soldered with 60/40 solder.

A2.3 The voltage drop across each termination (friction plus crimp) is to be calculated as follows and
should not exceed the value given in Table A2.1.

Total voltage drop = Measurement ″A″ – 1/4 of Measurement ″B″

Table A2.1
Maximum voltage drop

Maximum voltage drop, millivolts

Brass to brassa Tin to brassb and tin to tinc
Wire size, 0.250 inch (6.3 mm) All others 0.250 inch (6.3 mm) All others
AWG (mm2 ) 24 hr 500 hr 24 hr 500 hr 24 hr 500 hr 24 hr 500 hr
22 (0.32) 17 20 20 24 10 14 14 18
20 (0.52) 17 20 20 24 11 15 15 19
18 (0.82) 19 23 22 26 13 17 17 21
16 (1.3) 21 26 25 29 15 19 19 23
14 (2.1) 25 32 30 37 20 26 21 25
12 (3.3) 25 35 – – 22 28 – –
10 (5.3) 32 38 – – 26 30 – –
a Plain brass connector and plain brass tab of 0.250 inch (6.4 mm) size or tin-plated connector and plated steel tab 0.250 inch
(6.4 mm) size only.
b Tin-plated connector and plain brass tab.
c Tin-plated connector and tin-plated tab.
A2 ELECTRICAL QUICK-CONNECT TERMINALS - UL 310 MAY 27, 2003

No Text on This Page