1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 50 Enclosures for Electrical Equipment, Non- Environmental ConsiderationsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGH
2、TED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Enclosures for Electrical Equipment, Non-Environmental Considerations, UL 50 Thirteeth Edition, Dated October 16, 2015 Summary of Topics This Thirteenth Edition of UL 50 was iss
3、ued to include the following requirements: Addition of environmental Type ratings 3X, 3RX, and 3SX Sharp edges on electrical equipment Requirements for slot and tab fastenings Clarication of types of cast metal suitable for use as an enclosure Equipment door opening 90 degrees from the closed positi
4、on Certication Requirement Decision for nonmetallic-sheathed cable clamps Revision to requirement of cover and ange overlap for cabinets used as panelboards Revision to Annex B references The revised requirements are substantially in accordance with Proposal(s) on this subject dated October 10, 2014
5、. 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. UL provides this Standard as is without warranty of any kind, eith
6、er expressed or implied, including but not limited to, the implied warranties of merchantability or tness 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
7、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 ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users o
8、f the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from 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 electr
9、onic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the preface. The prior text for requirements that have been
10、revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. OCTOBER 16, 2015 UL 50 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 16, 2015 UL 50 tr2 No Text
11、on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Association of Standardization and Certication NMX-J-235/1ANCE-2015 Third Edition CSA Group CSA C22.2 No. 94.1-15 Second Edition Underwriters Laboratories Inc. UL 50 Thirteenth Edit
12、ion Enclosures for Electrical Equipment, Non-Environmental Considerations October 16, 2015 ANSI/UL 50-2015UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This standard is issued jointly by the Association of Standar
13、dization and Certication (ANCE), CSA Group, and Underwriters Laboratories Inc. (UL). Comments or proposals for revisions on any part of the standard may be submitted to ANCE, CSA Group, or UL at any time. Revisions to this standard will be made only after processing according to the standards develo
14、pment procedures of ANCE, CSA Group, and UL. CSA Group and UL will issue revisions to this standard by means of a new edition or revised or additional pages bearing their date of issue. ANCE will incorporate the same revisions into a new edition of the standard bearing the same date of issue as the
15、CSA Group and UL pages. Copyright 2015 ANCE Rights reserved in favor of ANCE. ISBN 1-55397-629-0 2015 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. This standard is subject to periodic review, and su
16、ggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to inquirescsagroup.org and include Proposal for change in the subject line: Standard designation (number); relevant clause, table, and/or gure number;
17、wording of the proposed change; and rationale for the change. To purchase CSA Group Standards and related publications, visit CSA Groups Online Store at shop.csa.ca or call toll-free 1-800-463-6727 or 416-747-4044. Copyright 2015 Underwriters Laboratories Inc. Comments or proposals for revisions on
18、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:/. The most recent designation of ANSI/UL 50 as an American National Standard (ANSI) occurred on September 30, 20
19、15. This ANSI/UL Standard for Safety consists of the Thirteenth Edition To purchase UL Standards, visit COMM 2000 at http:/m- or call toll free 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface .5 1 Scope .7 2 U
20、nits of Measurement .7 3 Components 7 4 References .8 5 Denitions 8 6 Construction .11 6.1 General 11 6.2 Observation windows 13 6.3 Openings .13 6.4 Sheet metal enclosures 14 6.5 Cast metal enclosures .17 6.6 Polymeric materials 17 6.7 Covers and doors .19 6.8 Hinges .23 6.9 Latches and handles .25
21、 6.10 Connections for wiring systems 25 6.11 Conduit hubs 27 6.12 Field-installed accessories/kits .27 7 Marking .27 7.1 Enclosures and accessories/kits .28 7.2 Cast metal enclosure 28 7.3 Cast-aluminum enclosure .28 7.4 Extension 28 7.5 Insulating material .28 7.6 Polymeric enclosure .29 7.7 Condui
22、t hubs, closure plates, and other equipment 29 7.8 Ventilated Type 1, 2, 3R, or 3RX enclosures 29 8 Tests .29 8.1 Comparative deection test (enclosure) 29 8.2 Deection test (doors and covers) .30 8.3 Hinge strength test 30 8.4 Multiple knockouts test .30 8.5 Polymeric enclosures bonding test 31 8.6
23、Polymeric enclosures rigid metallic conduit connection test .31 8.7 Metallic enclosure threaded opening test .33 8.8 Metallic enclosure conduit hub test 33 8.9 Rod entry test .33 8.10 Crushing resistance test .34 8.11 Mold stress relief test .34 9 Cabinets and Cutout Boxes .35 9.1 General 35 9.2 She
24、et metal cabinets 35 10 Junction and Pull Boxes .35 10.1 General .35 10.2 Covers and doors 36 10.3 Conduit openings 36 10.4 Equipment grounding .36 10.5 Removable sides .37 OCTOBER 16, 2015 NMX-J-235/1ANCE-2015 CSA C22.2 NO. 94.1-15 UL 50 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCT
25、ION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 10.6 Marking details .37 Tables 39 Figures .43 Annex A Standards For Components (Normative) Annex B Reference Standards (Normative) Annex C Marking (Normative US Only Requirement) C.1 General .58 C.2 Non-environmental enclosure ratings (US requirements)
26、 58 Annex D Knockout Dimensions (Informative) OCTOBER 16, 2015 NMX-J-235/1ANCE-2015 CSA C22.2 NO. 94.1-15 UL 50 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the harmonized ANCE, CSA Group, and UL standard for Enclosures f
27、or Electrical Equipment, Non-Environmental Considerations. It is the third edition of NMX-J-235/1-ANCE, the second edition of CAN/CSA C22.2 No. 94.1, and the thirteenth edition of UL 50. This edition of CSA C22.2 No. 94.1 supersedes the previous edition published in 2007.This edition of UL 50 supers
28、edes the previous edition published on September 4, 2007. This harmonized standard was prepared by the Association of Standardization and Certication (ANCE), CSA Group, and Underwriters Laboratories Inc. (UL). The efforts and support of Technical Harmonization Committee 70/31 are gratefully acknowle
29、dged. This standard is considered suitable for use for conformity assessment within the stated scope of the standard. The present Mexican standard was developed by the CT CDI Control y Distribucin Industrial from the Comit de Normalizacin de la Asociacin de Normalizacin y Certicacin, A.C., CONANCE,
30、with the collaboration of the enclosures manufacturers and users. This standard was reviewed by the CSA Integrated Committee on Enclosures, under the jurisdiction of the CSA Technical Committee on Industrial Products and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and
31、 has been formally approved by the CSA Technical Committee. This standard has been approved by the American National Standards Institute (ANSI) as an American National Standard. Application of Standard Where reference is made to a specic number of samples to be tested, the specied number is consider
32、ed a minimum quantity. Note: Although the intended primary application of this standard is stated in its scope, it is important to note that it remains the responsibility of the users of the standard to judge its suitability for their particular purpose. Level of harmonization This standard uses the
33、 IEC format but is not based on, nor is it considered equivalent to, an IEC standard. This standard is published as an equivalent standard for ANCE, CSA Group, and UL. An equivalent standard is a standard that is substantially the same in technical content, except as follows: Technical national diff
34、erences are allowed for codes and governmental regulations as well as those recognized as being in accordance with NAFTA Article 905, for example, because of fundamental climatic, geographical, technological, or infrastructural factors, scientic justication, or the level of protection that the count
35、ry considers appropriate. Presentation is word for word except for editorial changes. Reasons for differences from IEC The THSC investigated and found no existing IEC standards or work programs covering the scope of the products in this standard. OCTOBER 16, 2015 NMX-J-235/1ANCE-2015 CSA C22.2 NO. 9
36、4.1-15 UL 50 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Interpretations The interpretation by the standards development organization of an identical or equivalent standard is based on the literal text to determine compliance with the s
37、tandard in accordance with the procedural rules of the standards development organization. If more than one interpretation of the literal text has been identied, a revision is to be proposed as soon as possible to each of the standards development organizations to more accurately reect the intent. O
38、CTOBER 16, 2015 NMX-J-235/1ANCE-2015 CSA C22.2 NO. 94.1-15 UL 50 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL ENCLOSURES FOR ELECTRICAL EQUIPMENT, NON- ENVIRONMENTAL CONSIDERATIONS 1 Scope 1.1 This standard applies to enclosures for elec
39、trical equipment intended to be installed and used in non-hazardous locations in accordance with the Canadian Electrical Code, Part I, CSA C22.1, the provisions of the National Electrical Code, NFPA 70, and the provisions of Mexicos Electrical Installations, NOM-001-SEDE, as follows: a) Enclosures f
40、or indoor locations, Types 1, 2, 5, 12, 12K, and 13; and b) Enclosures for indoor or outdoor locations, Types 3, 3X, 3R, 3RX, 3S, 3SX, 4, 4X, 6, and 6P. 1.2 This standard covers the non-environmental construction and performance requirements for enclosures to provide a degree of protection to person
41、nel against incidental contact with the enclosed equipment. The additional environmental construction and performance requirements for enclosures are located in CSA C22.2 No. 94.2, UL 50E, and NMX-J-235/2-ANCE (See Annex B, Ref. No. 15), which are intended to be used in conjunction with this standar
42、d. 1.3 Where an individual product standard contains requirements that are at variance with those of this standard, the requirements of the individual product standard take precedence. 1.4 In the United States and Mexico, cabinets and cutout boxes and junction and pull boxes are covered by Clauses 9
43、 and 10 of this Standard. In Canada, junction boxes, cutout boxes, and pull boxes are covered by CSA C22.2 No. 40 and are not covered by this standard. See Annex B, Ref. No. 12. 1.5 Outlet boxes having a volume of not more than 1640 cm 3 (100 in 3 ) are covered by CSA C22.2 No. 18.1, NMX-J-023/1-ANC
44、E, and the UL 514 series (see Annex B, Ref. No. 6 and 13) and are not covered by this standard. 1.6 In Canada and the United States , swimming pool type junction boxes are covered by CSA C22.2 No. 89 and UL 1241 (see Annex B, Ref. No. 11) and are not covered by this standard. 2 Units of Measurement
45、2.1 The values given in SI (metric) units shall be normative. Any other values given shall be for informational purposes only. 3 Components 3.1 Except as indicated in Clause 3.2, a component of a product covered by this standard shall comply with the requirements for that component. See Annex A for
46、a list of standards covering components generally used in the products covered by this standard. A component shall comply with the ANCE, CSA Group, or UL standards as appropriate for the country where the product is to be used. OCTOBER 16, 2015 NMX-J-235/1ANCE-2015 CSA C22.2 NO. 94.1-15 UL 50 7UL CO
47、PYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this stan
48、dard, 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 construction features or restricted in performance capabilities. Such components are intend
49、ed for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. 4 References 4.1 For undated references to standards, such reference shall be considered to refer to the latest edition and all revisions to that edition up to the time when this standard was approved. For dated references to standards, such reference shall be considered t
