1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1977 Component Connectors for Use in Data, Signal, Control and Power ApplicationsUL 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 Component Connectors for Use in Data, Signal, Control and Power Applications, UL 1977 Third Edition, Dated January 7, 2016 SUMMARY OF TOPICS These new edition to UL 1977
3、 includes the revision of the thickness requirement for ammability test specimens The revised requirements are substantially in accordance with Proposal(s) on this subject dated December 4, 2015. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or tra
4、nsmitted in any form by any means, 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
5、for any purpose. In no event will 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 representa
6、tive has been advised of the possibility 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 fro
7、m and against any loss, expense, 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, exce
8、pt for those paragraphs, sections, 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
9、 are preceded by a SUPERSEDED REQUIREMENTS notice. JANUARY 7, 2016 UL 1977 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 7, 2016 UL 1977 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
10、DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 7, 2016 1 UL 1977 Standard for Component Connectors for Use in Data, Signal, Control and Power Applications First Edition December, 1995 Second Edition December, 2007 Third Edition January 7, 2016 This UL Standard for Safety consists of the Third Editi
11、on. 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 ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed n
12、or electronic copy of a Standard 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 2016 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER
13、 REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 7, 2016 UL 1977 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 Glossary .6 3 Components 6 4 Units of Measurement .7 5
14、References .7 CONSTRUCTION 6 General 7 7 Insulating Materials 7 8 Current-Carrying Parts .8 9 Grounding and Dead-Metal Parts .9 10 Assembly 10 10.1 General .10 10.2 Accessibility of live parts 10 10.3 Connection between mating devices 12 11 Spacings 12 PERFORMANCE 12 General 13 13 Accelerated Aging
15、Test 14 13.1 Rubber compounds .14 13.2 PVC compounds .14 14 Mold Stress Relief Test 14 15 Overload Test 15 16 Temperature Test .16 17 Dielectric Voltage-Withstand Test .17 18 Resistance To Arcing Test .18 19 Conductor Secureness Test 19 20 Flammability Test .19 21 Grounding Impedance Test 20 RATINGS
16、 22 General 20 MARKINGS 23 General 20 APPENDIX A Standards for ComponentsA1 JANUARY 7, 2016 UL 1977 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover single and multipole connectors, intended
17、for factory assembly to copper or copper alloy conductors or printed wiring boards, for use in data, signal, control and power applications within and between electrical equipment. 1.2 These requirements apply to devices categorized as follows (See Figure 1.1): a) Type 0 rated less than 8.3 A and le
18、ss than 30 V rms (42 V peak); b) Type 1A rated less than 8.3 A and from 30 V up to and including 600 V ac or dc, or both; c) Type 1B rated from 8.3 A up to and including 200 A, and less than 30 V rms (42 V peak); d) Type 2 rated from 8.3 A to less than 31 A and from 30 V up to and including 600 V ac
19、 or dc or both; e) Type 3 rated from 31 A up to and including 200 A and from 30 V up to and including 600 V ac or dc, or both. f) Type 4 rated from greater than 200 A up to and including 1000 A, and up to and including 6 0 0Va co rd c . g) Type 5 rated less than 31 A and from 601 V up to and includi
20、ng 6000 V ac or dc, or both. Type designations used in this Standard only serve as a guide to determine appropriate requirements, and do not represent an assigned rating. A device without an assigned current rating is considered to be either a Type 0 or Type 1A depending upon the assigned voltage ra
21、ting. This is generated text for gtxt. JANUARY 7, 2016 UL 1977 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 1.3 This standard does not directly apply to the following devices, but may be used to supplement the requirements within these s
22、tandards when a device is evaluated to these standards: a) Devices produced integrally with exible cord or cable that are covered by the Standard for Cord Sets and Power-Supply Cords, UL 817; b) Devices intended for connection to the branch circuit, such as attachment plugs, cord connectors, recepta
23、cles, inlets, and outlets, that are covered by the Standard for Attachment Plugs and Receptacles, UL 498; c) Devices solely intended for direct 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, t
24、hat are covered by the Standard for Plugs, Receptacles, and Cable Connectors of the Pin and Sleeve Type, UL 1682; d) Devices consisting of wiring terminals and supporting blocks intended for the connection of wiring that are covered by the Standard for Terminal Blocks, UL 1059; e) Devices intended f
25、or use with telecommunications networks, that are covered by the Standard for Information Technology Equipment Safety Part 1: General Requirements, UL 60950-1, or the Standard for Communications Circuit Accessories, UL 1863; f) Devices such as wire connectors and soldering lugs that are covered by t
26、he Standards for Wire Connectors, UL 486A-486B; Splicing Wire Connectors, UL 486C; or Equipment Wiring Terminals for Use with Aluminum and/or Copper Conductors, UL 486E; Figure 1.1 Connector type designations JANUARY 7, 2016 UL 1977 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
27、 DISTRIBUTION WITHOUT PERMISSION FROM UL g) Devices such as quick-connect terminals that are covered by the Standard for Electrical Quick-Connect Terminals, UL 310. 1.4 The requirements in this standard may not entirely address all possible situations due to the wide variety of products and designs.
28、 In those situations, the Standard for Attachment Plugs and Receptacles, UL 498 may be used to supplement the requirements in this standard. Where a conict exists between the requirements of UL 498 and UL 1977, the requirements of UL 1977 shall take precedence. 2 Glossary 2.1 For the purpose of this
29、 Standard, the following denitions apply. 2.2 CONTACT A conductive element intended to mate with a corresponding element to provide an electrical path. 2.3 ENCLOSURE The case or housing into which the insulator and contacts are assembled. 2.4 HYBRID DEVICE A device employing dedicated contacts of tw
30、o or more type designations. 2.5 INSULATOR The portion of a device that provides for separation and support of contacts. May be combined with the enclosure. 2.6 TERMINAL A conductive part provided on a contact for connecting a conductor. 3 Components 3.1 Except as indicated in 3.2, a component of a
31、product covered by this standard shall comply with the requirements for that component. See Appendix A for a list of standards covering components used in the products covered by this standard. 3.2 A component is not required to comply with a specic requirement that: a) Involves a feature or charact
32、eristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 3.3 A component shall be used in accordance with its rating established for the intended conditions of use. 3.4 Specic components are incomplete in
33、 construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. JANUARY 7, 2016 UL 1977 6UL COPYRIGHTED MATERIAL NOT
34、AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4 Units of Measurement 4.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 5 References 5.1 Any undated reference to a code or standard appearing in
35、 the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. CONSTRUCTION 6 General 6.1 Devices complying with these requirements are acceptable for use as components in an end product where the acceptability of the combination is to be determi
36、ned. 6.2 The acceptability of a connector in any particular application depends on its ability to be used under the conditions that prevail in actual service. For a particular application, a connector may be affected by the requirements for the equipment in which it is used, and it may be necessary
37、to additionally evaluate features or performance characteristics that are not specied in this standard. 7 Insulating Materials 7.1 A base or body in or on which live parts are mounted shall be of porcelain or another insulating material acceptable for the particular application. 7.2 A polymeric mate
38、rial, including rubber compounds, used as an electrical insulator, an internal barrier necessary to maintain spacings, or an enclosure of live parts shall comply with the requirements shown in Table 7.1. Exception No. 1: A polymeric material need not have a ame rating for the thinnest measured thick
39、ness when the molded connector/material combination complies with the 12 mm or 20 mm (3/4 in) end-product ame tests described in the Standard for Polymeric Materials Use in Electrical Equipment Evaluations, UL 746C. Exception No. 2: In lieu of a minimum HB ammability rating, small components with an
40、 overall volume of less than 2500 mm 3 (0.15 in 3 ) may be evaluated and classed with a ammability rating of SC-0, SC-1, or SC-2 in accordance with the Standard for Tests for Flammability of Small Polymeric Component Materials, UL 1694. Exception No. 3: For materials with other than VTM ammability c
41、lassications, the ame rating of the material shall be evaluated using the thinnest measured thickness employed in the connector or nominal 1/64 inch (0.4 mm) thickness, whichever is greater. JANUARY 7, 2016 UL 1977 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITH
42、OUT PERMISSION FROM UL 7.3 In this requirement, the term established , when used in reference to material property values, is dened as those values that have been determined in accordance with the Standard for Polymeric Materials Long Term Property Evaluations UL 746B. The polymeric material shall b
43、e evaluated using the specimen thickness separating live parts or live parts and grounded metal parts. When the evaluation thickness of the specimen is between two closest thickness values that have been established, the Electrical RTI corresponding to the lower of these two thickness values shall b
44、e used. When the evaluation thickness of the specimen is less than the smallest thickness for which a value has been established, the Electrical RTI at the minimum thickness with an established value shall be used. If the material has no established RTI values at any thickness, the generic value for
45、 the family of resin to which the material belongs as dened in Section 7 and Table 7.1 of UL 746B shall be used. When the Mold stress relief, Dielectric voltage-withstand, and the Temperature tests are successfully performed, as required by the desired Type designation and electrical rating(s), the
46、maximum operating temperature of the device may be assigned up to the Electrical RTI value of the polymeric material as determined in this requirement (7.3 of UL 1977). Table 7.1 Minimum ratings for polymeric materials Type Flame rating a Relative thermal index (RTI) Electrical 05 0 1A HB 50 1B HB 5
47、0 2H B5 0 3H B5 0 4H B5 0 5H B5 0 a See Exception Nos. 1, 2 and 3 to 7.2. 8 Current-Carrying Parts 8.1 Device contacts shall be constructed of plated or unplated copper or copper alloy. Other materials may be accepted if they are found to provide adequate electrical and mechanical characteristics as
48、 a result of special investigation. 8.2 Crimp style terminals are considered representative of solder terminals provided the remaining portion of the contacts are identical. 8.3 Iron or steel, whether plain or plated, shall not be used for parts that are depended upon to carry current. Exception: Pa
49、rts that are depended upon to carry current in high temperature applications may be of suitably plated or stainless steel. 8.4 A current-carrying part shall be secured in place so that turning relative to the surface on which it is mounted would not adversely affect the performance of the device. JANUARY 7, 2016 UL 1977 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 8.5 A terminal plate threaded for a wire-binding screw shall me
