1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 651 Schedule 40, 80, Type EB and A Rigid PVC Conduit and Fittings STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM U
2、LUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Schedule 40, 80, Type EB and A Rigid PVC Conduit and Fittings, UL 651 Eighth Edition, Dated October 25, 2011 Summary of Topics The following revisions are being issu
3、ed for UL 651: 1. Exemption of Permanency of Printing Requirements for Schedule 40 and 80 Conduit when Laser Printed; 2. Editorial Clarication for Paragraph 7.5.3.1 and Removal of Reference to ASTM D648; 3. Additional Editorial Corrections for Table 6.2 Text that has been changed in any manner or im
4、pacted by ULs electronic publishing system is marked with a vertical line in the margin. The revised requirements are substantially in accordance with Proposal(s) on this subject dated April 1, 2016. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or
5、 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, either expressed or implied, including but not limited to, the implied warranties of merchantability or tn
6、ess 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 repres
7、entative 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
8、 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 electronic Standard on the purchasers computer system. JUNE 15, 2016 UL 651 tr1UL COPYRIGHTED MATERIAL NOT A
9、UTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JUNE 15, 2016 UL 651 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 25, 2011 (Title Page Reprinted: June 15, 2016) 1 UL 651 Standa
10、rd for Schedule 40, 80, Type EB and A Rigid PVC Conduit and Fittings Prior to the eighth edition, the requirements for Type EB and A products covered by this standard were included in the Standard for Type EB and A Rigid PVC Conduit, UL 651A. Prior to the fourth edition, the requirements for the Sch
11、edule 40 products covered by this standard were included in the Standard for Rigid Nonmetallic Conduit, UL 651. First Edition September, 1965 Second Edition August, 1972 Third Edition October, 1980 Fourth Edition May, 1981 Fifth Edition August, 1989 Sixth Edition August, 1995 Seventh Edition October
12、, 2005 Eighth Edition October 25, 2011 This ANSI/UL Standard for Safety consists of the Eighth Edition including revisions through June 15, 2016. The most recent designation of ANSI/UL 651 as an American National Standard (ANSI) occurred on June 15, 2016. ANSI approval for a standard does not includ
13、e the Cover Page, Transmittal Pages and Title Page. The Department of Defense (DoD) has adopted UL 651 on August 5, 1983. The publication of revised pages or a new edition of this Standard will not invalidate the DoD adoption. Comments or proposals for revisions on any part of the Standard may be su
14、bmitted 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 Standard should be altered in any way. All of ULs Sta
15、ndards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 651-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY
16、 2, 2014 UL 651 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 1.1 General 5 1.2 Schedule 40 and 80 conduit and ttings .6 1.3 Type EB and A conduit and ttings .6 1.4 Applications 7 1.5
17、Fittings 7 2 Units of Measurement 8 3 Undated References 8 CONSTRUCTION 4 Rigid PVC Conduit 8 4.1 General 8 4.2 Measurements 10 4.3 Schedule 40 and 80 conduit 12 4.4 Couplings for Schedule 40 and 80 conduit 13 4.5 Type EB and A conduit 15 4.6 Couplings for Type EB and A conduit 16 4.7 Elbows .18 5 R
18、igid PVC Conduit Fittings .19 5.1 General .19 5.2 Fabricated ttings .26 5.3 Junction-box adapters 26A 5.4 Expansion, expansion-deection, or deection joints 26A 5.5 Threaded adapters .26B 5.6 Service entrance head 26B 5.7 Wet-location ttings 26B 5.8 End bells 26B PERFORMANCE 6 Rigid PVC Conduit 28A 6
19、.1 General .28A 6.2 Tensile strength .29 6.3 Extrusion .34 6.4 Low-temperature handling 36 6.5 Water absorption 36 6.6 Resistance to impact .37 6.7 Identication of compounds .38 6.8 Deection under load Schedule 40 and 80 and Type A .38 6.9 Resistance to crushing Schedule 40 and 80 and Type A .43 6.1
20、0 Tests on integral couplings Schedule 40 and 80 and Type EB .44 6.11 Flame test Schedule 40 and 80 .45 6.12 Directional boring underground conduit Schedule 40 and 80 48 6.13 Resistance to specic reagents Schedule 40 and 80 .50 6.14 Sunlight resistance Schedule 40 and 80 52 6.15 Schedule 40 and 80 f
21、or use with 90 wire 56 6.16 Permanency of printing Schedule 40 and 80 62 MAY 2, 2014 UL 651 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.17 Stiffness of Type EB .64 7 Rigid PVC Conduit Fittings 65 7.1 General .65 7.2 All types 65 7.3 N
22、onmetallic service-entrance heads .72 7.4 Expansion, expansion-deection, or deection joints .78A 7.5 Evaluation of Elastomeric Materials 78D MARKINGS 8 Rigid PVC Conduit .79 8.1 General .79 8.2 Schedule 40 and 80 .80 8.3 Type EB and A 81 9 Rigid PVC Conduit Fittings .81 9.1 General .81 9.2 Specic de
23、tails 82 9.3 Carton markings .82 MAY 2, 2014 UL 651 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 General 1.1.1 These requirements cover Schedule 40, Schedule 80, Type EB and Type A extruded rigid PVC (polyvinyl c
24、hloride) electrical conduit and ttings. These requirements also cover elbows, couplings, adapters, expansion, expansion-deection, or deection joints, and similar ttings that are constructed at least in part of rigid PVC. The designations Schedule 40 , Schedule 80 , Type EB , Type A refer to USA trad
25、e sizes of conduit having iron pipe-size outside diameters and specic wall thicknesses. Couplings, adapters, expansion, expansion-deection, or deection joints, and similar ttings are intended to be used with Schedule 40, Schedule 80, Type EB and Type A rigid PVC conduit, and elbows in accordance wit
26、h the National Electrical Code (NEC), NFPA 70. 1.1.1 revised May 2, 2014 1.1.2 Rigid PVC conduit and ttings covered in these requirements are intended for use as rigid nonmetallic raceway for wires and cables in accordance with the National Electrical Code (NEC), NFPA 70. 1.1.3 Conduit bodies (pull
27、boxes) and covers, ush-device boxes and covers, and outlet boxes and covers that are constructed of rigid PVC or another nonmetallic material and are for use with the rigid PVC conduit and ttings covered in these requirements are covered separately in the Standard for Nonmetallic Outlet Boxes, Flush
28、-Device Boxes, and Covers, UL 514C. 1.1.4 Rigid PVC conduit and ttings covered in these requirements are intended to be joined to each other and to rigid PVC boxes, conduit bodies, and ttings in the eld by means of a cement that is or contains a solvent for polyvinyl chloride. 1.1.5 Unless the wordi
29、ng of a requirement that applies to rigid PVC conduit and ttings specically limits the requirement to Schedule 40, Schedule 80, Type EB or to Type A, each such requirement in this standard applies to all types. 1.1.6 Reinforced thermosetting resin conduit and associated ttings are covered separately
30、 in the Standard for Aboveground Reinforced Thermosetting Resin Conduit (RTRC) and Fittings, UL 2515 and the Standard for Belowground Reinforced Thermosetting Resin Conduit (RTRC) and Fittings, UL 2420. MAY 2, 2014 UL 651 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTI
31、ON WITHOUT PERMISSION FROM UL 1.2 Schedule 40 and 80 conduit and ttings 1.2.1 Schedule 40 rigid PVC conduit and ttings are for aboveground use indoors or outdoors exposed to sunlight and weather, and for underground use by direct burial or encasement in concrete. Schedule 40 rigid PVC conduit, elbow
32、s, that are specically marked for underground use are suitable for use underground only by direct burial or encasement in concrete. 1.2.2 Schedule 80 rigid PVC conduit and ttings are for use wherever Schedule 40 rigid PVC conduit may be used and are for installation on poles in accordance with the N
33、ational Electrical Code (NEC), NFPA 70. 1.2.3 The following restrictions apply to use of the Schedule 40 and Schedule 80 rigid PVC conduit and ttings mentioned in 1.1.1: a) Use at 50C (122F) and lower ambient temperatures and b) Use with 75C (167F) wiring, but the conduit and ttings may be used with
34、 90C (194F) wiring if they comply with the construction (see Conduit for Use with 90C Wire, 6.15) and marking (see 8.2.1, 8.2.4 and 8.2.5) requirements covering use with 90C (194F) wiring. 1.2.4 In addition to the applicable requirements specied in this standard, Schedule 40 and Schedule 80 rigid PV
35、C conduit intended for directional boring shall be subjected to the performance requirements in 6.12. 1.2.5 Deleted May 2, 2014. 1.3 Type EB and A conduit and ttings 1.3.1 The Type EB and Type A rigid PVC conduit and ttings mentioned in 1.1.1 are intended for use at 50C (122F) and lower ambient temp
36、eratures. Type A rigid PVC conduit and ttings are intended for use with 75C (167F) wiring. Type A and Type EB rigid PVC conduit and ttings, where encased in concrete in trenches outside of buildings, may be used with 90C (194F) wiring. 1.3.2 Type EB (encased burial) rigid PVC conduit is intended for
37、 encasement in concrete in trenches outside of buildings. Type A rigid PVC conduit is intended for encasement in concrete in any location. MAY 2, 2014 UL 651 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 1.4 Applications 1.4.1 Couplings c
38、overed by these requirements are ttings intended for joining: a) Two lengths of rigid PVC conduit, b) A length of rigid PVC conduit to a rigid PVC elbow and c) In conjunction with a junction-box adapter, a length of rigid PVC conduit or a rigid PVC elbow to a box. 1.5 Fittings 1.5.1 Junction-box ada
39、pters covered by these requirements are ttings intended to connect a length of rigid PVC conduit, a PVC elbow to a rigid PVC box (not limited to junction boxes) with a coupling. 1.5.2 Internally-threaded adapters covered by these requirements are ttings intended for joining a length of rigid PVC con
40、duit, a PVC elbow to threaded rigid metal conduit or other externally-threaded devices. 1.5.3 Externally-threaded adapters (also referred to as terminal adapters) covered by these requirements are ttings intended for joining a length of rigid PVC conduit or elbow to: a) The knockout area of a metal
41、box with a metal locknut, b) A threaded metal hub or tting on a metal box, c) A threaded hub on a phenolic box, or d) A knockout in a phenolic box. 1.5.4 Reducers covered by these requirements are ttings intended for joining lengths of two different sizes of rigid PVC conduit. 1.5.5 Caps covered by
42、these requirements are ttings intended for closing the ends of unused lengths of rigid PVC conduit. 1.5.6 End bells covered by these requirements are ttings intended to provide a bushed opening at the open end of a length of rigid PVC conduit. (See 5.8.1.) 1.5.7 Construction requirements for ttings
43、covered by this standard are specied in Section 5. Performance requirements are specied in Section 7. MAY 2, 2014 UL 651 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 Units of Measurement 2.1 Values stated without parentheses are the re
44、quirement. Values in parentheses are explanatory or approximate information. 2.2 Unless otherwise indicated, all voltage and current values mentioned in this standard are root-mean-square (rms). 3 Undated References 3.1 Any undated reference to a code or standard appearing in the requirements of thi
45、s standard shall be interpreted as referring to the latest edition of that code or standard. CONSTRUCTION 4 Rigid PVC Conduit 4.1 General 4.1.1 The compound of which rigid PVC conduit and ttings are made shall equal or exceed the cell classication 12123 as described in Standard Specication for Rigid
46、 Poly (Vinyl Chloride) (PVC) Compounds and Chlorinated Poly (Vinyl Chloride) (CPVC Compounds), ASTM D 1784. 4.1.2 Clean rework compound, generated from the manufacturers own production and reused by the manufacturer, meets the intent of these requirements when the nished product complies with all of
47、 the requirements of this standard. 4.1.3 Clean industrial scrap (as dened in Standard Guide for Development of ASTM Standards Relating to Recycling and Use of Recycled Plastics, ASTM D 5033) that is not commingled with other plastic materials and originates from a single manufacturing process shall
48、 be permitted to be used if: a) Each source has been qualied in accordance with the requirements of the Standard for Polymeric Materials - Fabricated Parts, UL 746D and b) The conduit and ttings produced meet all the requirements of this standard. 4.1.4 Rigid PVC conduit and ttings are inherently re
49、sistant to the corrosive inuences of common industrial atmospheres including the vapors and mists of bases, hydrouoric and chromic acids, and pickling and plating baths. Resistance to wetting by and immersion in specic reagents is covered in Resistance to Specic Reagents, 6.13 and 7.2.10 and related markings in 8.2.2, 8.2.3, 9.2.1 and 9.2.2. 4.1.5 Rigid PVC conduit shall provide a smooth raceway for the pulling in of w
