UL 2238-2011 UL Standard for Safety Cable Assemblies and Fittings for Industrial Control and Signal Distribution (Second Edition Reprint with revisions through and including Decemb.pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2238 Cable Assemblies and Fittings for Industrial Control and Signal DistributionUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL

2、COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Cable Assemblies and Fittings for Industrial Control and Signal Distribution, UL 2238 Second Edition, Dated May 4, 2011 Summary of Topics Revision pages have been issued

3、 for the Standard for Cable Assemblies and Fittings for Industrial Control and Signal Distribution, UL 2238 to reect the latest approval date as an American National Standard and to include the following revision that was proposed June 7, 2013: Added end-project ame test for an enclosure of a valve

4、tting. Text that has been changed in any manner or impacted by ULs electronic publishing system 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 dat

5、e on which the changed requirement becomes effective. The revised requirements are substantially in accordance with Proposal(s) on this subject dated June 7, 2013. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any mean

6、s, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. 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 tness for any purpose. In no event wil

7、l UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, 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 pos

8、sibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense,

9、 liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, section

10、s, tables, gures, 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 RE

11、QUIREMENTS notice. DECEMBER 13, 2013 UL 2238 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 13, 2013 UL 2238 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISS

12、ION FROM UL MAY 4, 2011 (Title Page Reprinted: December 13, 2013) 1 UL 2238 Standard for Cable Assemblies and Fittings for Industrial Control and Signal Distribution First Edition February, 2009 Second Edition May 4, 2011 This ANSI/UL Standard for Safety consists of the Second Edition, including rev

13、isions through December 13, 2013. The most recent designation of ANSI/UL 2238 as an American National Standard (ANSI) occurred on December 13, 2013. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or proposals for r

14、evisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standar

15、d should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2013 UNDERWRITERS LABORATORIES INC. ANSI/UL 2238-2013UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION

16、 OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 13, 2013 UL 2238 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Glossary .6 3 References .6B 4 Components 6B 5 Units of Measuremen

17、t 6B CONSTRUCTION 6 Accessibility of Uninsulated Live Parts .7 6.3 Valve ttings 10 7 Insulating Materials 10 7.1 General 10 7.2 Flammability .10A 7.3 Electrical properties 11 7.4 Thermal properties 14 8 Live Parts .14A 9 Grounding and Dead-Metal Parts .15 10 Terminals 16 11 Strain Relief and Cord En

18、tries .18 12 Spacings 18 13 Assembly 18 13.1 General .18 13.2 Polarization 19 13.3 Mating and interchangeability 19 13.4 Fittings 20 13.5 Identication and wiring .20 14 Enclosure 22 15 Cable Assemblies .22 15.1 General .22 15.2 Flexible cord or cable .23 16 Mounting 23 17 Outdoor Use .23 PERFORMANCE

19、 18 General 23 19 Mold Stress-Relief Distortion Test .24 20 Moisture Absorption Resistance Test 25 21 Dielectric Voltage-Withstand Test .25 22 Insulation Resistance Test .26 23 Conductor Secureness Test 27 24 Strain-Relief Test .27 24.1 Cord-to-tting test 27 24.2 Feeder-tap cable systems test .28 25

20、 Temperature Test .28 26 Current-Cycling and Vibration Test 29 26.1 General .29 26.2 Current-cycling before vibration test 30 DECEMBER 13, 2013 UL 2238 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 26.3 Vibration test 30 26.4 Current-cycl

21、ing after vibration test 30 26.5 Calculations .31 27 Jacket Retention Test .31 28 Polarization Test 32 29 Adhesion Test 32 30 Environmental Enclosure Tests .32 31 Grounding Impedance Test 32 32 Fault Current Test 33 33 Cable Pullout Test (For Pin Type or Insulation Displacement Type Terminals) .33 3

22、4 Creep Test (For Pin Type or Insulation Displacement Type Terminals) 34 35 Comparative Tracking Index Test .34 36 Glow Wire Test .34 37 High-Current Arc Resistance to Ignition Test .34 37.7 Strength of insulation base test 36 37.8 Grounding (bonding) path current test 36 37.9 Assembly test 37 37.10

23、 Accelerating aging tests .37 37.11 PVC compounds and copolymers .38 37.12 Crushing test for valve connectors only 38 37.13 Impact test for valve connectors only 38 37.14 Low temperature test for valve connectors only 38A 37.15 Tests for permanence of ag type cord or cable tag 38A 37.16 Tests for pe

24、rmanence of wrap around cord or cable label .38B 37.17 Test conditions 38C MANUFACTURING AND PRODUCTION TESTS 38 Dielectric Voltage-Withstand Test .38D RATINGS 39 General 39 MARKINGS 40 Details .40 40.1 General .40 40.2 Feeder-tap cable systems .42 40.3 Field assembled cable system .43 INSTRUCTIONS

25、41 Installation and Operating Instructions .44 41.1 General .44 41.2 Wiring information eld wiring terminals .45 APPENDIX A Standards for ComponentsA1 MARCH 21, 2012 UL 2238 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Sco

26、pe Section 1 effective February 13, 2013 1.1 These requirements cover devices intended for inter-connection of equipment, sensors, and actuators in remote-control, signaling, and power-limited circuits. Included are cable assemblies and ttings, feeder-tap cable systems, feed-through connectors, mult

27、i-outlet ttings, panel-mount ttings, and splitters. These devices are not intended for disconnect means. These devices are rated not more than 60 A and not more than 600 V. 1.2 Unless otherwise noted, all devices are intended for indoor use. 1.3 These devices are for use on alternating current, dire

28、ct current, or both. 1.4 The cable assembly ttings and panel-mount ttings are intended to be installed in accordance with the manufacturers installation instructions. The cable assembly ttings are intended to be assembled or molded on exible cord. 1.5 Each type of device covered by this standard is

29、described in generic terms where practicable. Reference to use locations identied in the National Electrical Code or specic applications are omitted unless they are required for the identication of the device type. Such additional information is included in the applicable standards for the end-use p

30、roduct involved or in markings for the device. 1.6 This standard does not cover male-to-male cable assemblies. 1.7 This standard does not directly apply to the following but may supplement other applicable standards: a) Devices produced integrally with exible cord or cable that are covered by the St

31、andard for Cord Sets and Power-Supply Cords, UL 817; b) Devices intended for connection to the branch circuit, such as attachment plugs, cord connectors, receptacles, inlets, and outlets, that are covered by the Standard for Attachment Plugs and Receptacles, UL 498; c) Devices solely intended for di

32、rect connection to the branch circuit in accordance with the National Electrical Code, NFPA 70, and that are provided with contacts of the pin and sleeve type, covered by the Standard for Plugs, Receptacles, and Cable Connectors, of the Pin and Sleeve Type, UL 1682; d) Devices intended to interconne

33、ct industrial machinery and to be installed in accordance with the Electrical Standard for Industrial Machinery, NFPA 79 that are covered by the Outline of Investigation for Multi-point Interconnection Power Cable Assemblies For Industrial Machinery, Subject 2237; e) Connectors intended for use in D

34、ata, Signal, Control and Power Applications within and between electrical equipment and intended for factory assembly as covered by the Standard for Component Connectors for Use in Data, Signal, Control and Power Applications, UL 1977; and the Standard for Telephone Equipment, UL 1459, or the Standa

35、rd for Communications Circuit Accessories, UL 1863; MAY 4, 2011 UL 2238 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 1.8 Fittings and devices that employ surge protective devices and/or circuitry to provide surge protection of internal f

36、unctionality, in addition to complying with the requirements of this standard, shall also comply with the construction and performance requirements for Type 4 component assemblies or for Type 5 components, as appropriate, in accordance with the Standard for Surge Protective Devices, UL 1449. 1.9 Fit

37、tings and devices that are intended to provide surge protection of connected equipment and wiring, in addition to the requirements of this standard, shall also be evaluated to the requirements (including ratings and markings) for either Type 2 or Type 3 (surge protective devices) applications in acc

38、ordance with the Standard for Surge Protective Devices, UL 1449. 2 Glossary Section 2 effective February 13, 2013 2.1 For the purpose of this standard the following denitions apply. 2.2 CABLE ASSEMBLY A length of exible cord or cable with an male cable tting as a line tting and a female cable tting

39、as a load tting. 2.2.1 CORD or CABLE TAG An adhesive backed label that is wrapped around the cord or cable and secured to itself forming a ag that protrudes from the cord or cable. A label without adhesive that is secured to the cord or cable using a securement strap such as a cable tie is also cons

40、ider a cord tag. Added 2.2.1 effective February 13, 2013 2.3 CURRENT-CARRYING CONDUCTOR A cord conductor excluding both the grounding conductor and the neutral conductor. 2.4 ENCLOSURE That part of the device that renders inaccessible all or any parts of the device that otherwise present a risk of e

41、lectric shock, propagate of ame initiated by electrical disturbances occurring within, or both. 2.5 FEEDER-TAP CABLE SYSTEM A connector provided with eld-wiring terminals for feed-through connection to power-limited tray cable or other appropriate cable and either a female connector to connect to a

42、cable assembly or eld-wiring terminals to connect to exible cord. 2.6 FEED-THROUGH CONNECTOR A male and female device directly connected through the pins or contacts. This device is not assembled on a cable or conductor. 2.7 FEMALE CABLE FITTING A female contact device intended to be molded or assem

43、bled to exible cord to make an electrical connection to a male cable tting or an inlet. 2.8 GROUNDED CONDUCTOR The circuit conductor that is intentionally grounded. 2.9 GROUNDING-CONDUCTOR PATH A path between the grounding pin or contact and the grounding terminal. 2.10 INLET A male contact device i

44、ntended to be mounted on equipment where the conductors are internal to the equipment to provide an integral means for the connection of a female cable tting. 2.11 INSULATION, BASIC Insulation applied to live parts to provide basic protection against a risk of electric shock. This insulation does no

45、t necessarily include insulation used exclusively for functional purposes. MARCH 21, 2012 UL 2238 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.12 INSULATION, FUNCTIONAL The insulation necessary for the proper functioning of the tting a

46、nd for basic protection against a risk of electric shock. This includes all parts relied upon to support live parts in place, all internal barriers necessary to maintain spacing, and the outlet face portion of all female ttings. 2.13 MALE CABLE FITTING A male contact device intended to be molded or

47、assembled to a exible cord or cable to make an electrical connection to a female panel-mount tting, a female cable tting, or outlet. 2.14 OUTLET A female contact device intended to be mounted on equipment where the conductors are internal to the equipment to provide an integral means for the connect

48、ion of a male cable tting. 2.15 POLARIZED DEVICE A device constructed for connection to a mating tting only in the position that connects related poles of an electrical circuit. 2.16 SMALL PARTS A small part is considered to be not more than 0.122 in 3 (2 cm 3 ) in volume. 2.17 SPLITTER A male tting

49、 that terminates in two or more outlets or that terminates in two or more female cable ttings. 2.18 TERMINAL, INSULATION-DISPLACEMENT A terminal having a contacting member that forces the conductor insulation aside and presses to contact the current-carrying conductor. 2.19 TERMINAL, PIN TYPE (INSULATION-PIERCING) A terminal having a contact pin that punctures the conductor insulation to contact the current-carrying conductor. 2.20 TERMINAL, PRESSURE W