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 FittingsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATE
2、RIAL 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 issued for UL 651: 1. Ad
3、dition of requirements for Nonmetallic Expansion-Deection Fittings, which includes changes to sections 1, 5, 7, and 9. 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 vert
4、ical 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. The revised requirements are substantially in accordance with Proposal(s) on this subject dated February 14, 2014. All rights reserved
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9、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 note following the affected item. The prior text for requirements that have b
10、een revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. MAY 2, 2014 UL 651 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 2, 2014 UL 651 tr2 No Text on T
11、his PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 25, 2011 (Title Page Reprinted: May 2, 2014) 1 UL 651 Standard for Schedule 40, 80, Type EB and A Rigid PVC Conduit and Fittings Prior to the eighth edition, the requirements fo
12、r 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 Schedule 40 products covered by this standard were included in the Standard for Rigid Nonmetallic Conduit, UL 651. First
13、 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, 2005 Eighth Edition October 25, 2011 This ANSI/UL Standard for Safety consists of the Eighth Edition including revi
14、sions through May 2, 2014. The most recent designation of ANSI/UL 651 as an American National Standard (ANSI) occurred on May 2, 2014. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. The Department of Defense (DoD) has adopt
15、ed 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 submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Lin
16、e 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 Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the
17、sole and exclusive property of UL. COPYRIGHT 2014 UNDERWRITERS LABORATORIES INC. ANSI/UL 651-2014UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 2, 2014 UL 651 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPR
18、ODUCTION 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 Fittings 7 2 Units of Measurement .8 3 Undated References 8 CONSTRUCTION 4 Rigid PVC Conduit
19、 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 Rigid PVC Conduit Fittings 19 5.1 General 19 5.2 Fabricated ttings .26 5.3 Junction-box ada
20、pters 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 6.1 General .28A 6.2 Tensile strength .29 6.3 Extrusion .34 6.4 Low-temperature handling 36 6
21、.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 6.10 Tests on integral couplings Schedule 40 and 80 and Type EB .44 6.11 Flame test Schedule 40
22、 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 for use with 90 wire .56 6.16 Permanency of printing Schedule 40 and 80 .62 MAY 2, 2014 UL 65
23、1 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 Nonmetallic service-entrance heads .72 7.4 Expansion, expansion-deection, or deection joints
24、.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 details 82 9.3 Carton markings .82 MAY 2, 2014 UL 651 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FO
25、R 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 chloride) electrical conduit and ttings. These requirements also cover elbows, couplings, adapt
26、ers, 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 trade sizes of conduit having iron pipe-size outside diameters and specic wall thicknesses. Coupli
27、ngs, 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 with the National Electrical Code (NEC), NFPA 70. 1.1.1 revised May 2, 2014 1.1.2 Rigid PVC condu
28、it 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 boxes) and covers, ush-device boxes and covers, and outlet boxes and covers that are construct
29、ed 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-Device Boxes, and Covers, UL 514C. 1.1.4 Rigid PVC conduit and ttings covered in these requir
30、ements 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 wording of a requirement that applies to rigid PVC conduit and ttings specically limits the require
31、ment 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 in the Standard for Aboveground Reinforced Thermosetting Resin Conduit (RTRC) and Fittings, U
32、L 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 DISTRIBUTION WITHOUT PERMISSION FROM UL 1.2 Schedule 40 and 80 conduit and ttings 1.2.1 Schedule 40 rigi
33、d 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, elbows, that are specically marked for underground use are suitable for use underground only by dir
34、ect 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 National Electrical Code (NEC), NFPA 70. 1.2.3 The following restrictions apply to use of the S
35、chedule 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 90C (194F) wiring if they comply with the construction (see Conduit for Use with 90C Wire, 6.
36、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 PVC conduit intended for directional boring shall be subjected to the performance requirements i
37、n 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 temperatures. Type A rigid PVC conduit and ttings are intended for use with 75C (167F) wiring. Typ
38、e 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 encasement in concrete in trenches outside of buildings. Type A rigid PVC conduit is intended
39、 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 covered by these requirements are ttings intended for joining: a) Two lengths of rigid PVC cond
40、uit, 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 adapters covered by these requirements are ttings intended to connect a length of rigid PVC condu
41、it, 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 conduit, a PVC elbow to threaded rigid metal conduit or other externally-threaded devices. 1.5.3
42、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 box with a metal locknut, b) A threaded metal hub or tting on a metal box, c) A threaded hub o
43、n 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 these requirements are ttings intended for closing the ends of unused lengths of rigid PVC con
44、duit. 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 covered by this standard are specied in Section 5. Performance requirements are specied in Sec
45、tion 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 requirement. Values in parentheses are explanatory or approximate information. 2.2 Unless otherw
46、ise 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 this standard shall be interpreted as referring to the latest edition of that code or standard. C
47、ONSTRUCTION 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 Poly (Vinyl Chloride) (PVC) Compounds and Chlorinated Poly (Vinyl Chloride) (CPVC Compounds),
48、 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 the requirements of this standard. 4.1.3 Clean industrial scrap (as dened in Standard Guide f
49、or 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 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
