【UL标准】UL 651-2007 Standard for Schedule 40 and 80 Rigid PVC Conduit and Fittings.doc

ul 651isbn 0-7629-1116 -6schedule 40 and 80 rigid pvc conduit and fittingsul copyrighted material not authorized for further reproduction or distribution without permission from ulthis pdf standard downloaded from may 15, 2007 ul 651tr3underwriters laboratories inc. (ul)333 pfingsten roadnorthbrook, il 60062-2096ul standard for safety for schedule 40 and 80 rigid pvc conduit and fittings, ul 651seventh edition, dated october 4, 2005revisions: this standard contains revisions through and including may 15, 2007.summary of topicsa revision to the manufacturing date on bends and elbows (paragraph 26.2) is being issued.the revised requirements are substantially in accordance with uls proposal(s) on this subject datedmarch 23, 2007.the revisions dated may 15, 2007 include a reprinted title page (page1) for this standard.as indicated on the title page (page 1), this ul standard for safety is an american national standard. attention is directed to the note on the title page of this standard outlining the procedures to be followed to retain the approved text of this ansi/ul standard.as indicated on the title page (page1), this ul standard for safety has been adopted by the department of defense.the ul foreword is no longer located within the ul standard. for information concerning the use and application of the requirements contained in this standard, the current version of the ul foreword is located on ulstandardsinfonet at: /ulforeword.htmlthe master for this standard at uls northbrook office is the official document insofar as it relates to a ul service and the compliance of a product with respect to the requirements for that product and service, or if there are questions regarding the accuracy of this standard.uls standards for safety are copyrighted by ul. neither a printed copy of a standard, nor the distribution diskette for a standard-on-diskette and the file for the standard on the distribution diskette 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.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, 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standard may be printed for each authorized user of a multiple-user version of an electronic standard. because of differences in the computer/software/printer setup used by ul and those of electronic standards purchasers, the printed copy obtained by a purchaser may not look exactly like the on-line screen view or the printed standard.an employee of an organization purchasing a ul standard can make a copy of the page or pages being viewed for their own fair and/or practical internal use.the requirements in this standard are now in effect, except for those paragraphs, sections, tables, figures, 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 requirements notice.new product submittals made prior to a specified future effective date will be judged under all of the requirements in this standard including those requirements with a specified future effective date, unless the applicant specifically requests that the product be judged under the current requirements. however, if the applicant elects this option, it should be noted that compliance with all the requirements in this standard will be required as a condition of continued listing and follow-up services after the effective date, and understanding of this should be signified in writing.copyright 2007 underwriters laboratories inc.this standard consists of pages dated as shown in the following checklist:pagedate1. may 15, 20072-6. october 4, 20056a-7 . december 7, 20068 . october 4, 20059 . december 7, 200610-14 . october 4, 200515 . december 7, 200616-49 . october 4, 200550 . may 15, 200751-76 . october 4, 2005this pdf standard downloaded from no text on this pageul copyrighted material not authorized for further reproduction or distribution without permission from uloctober 4, 2005(title page reprinted: may 15, 2007)1ansi/ul 651-2007ul 651standard for schedule 40 and 80 rigid pvc conduit and fittingsprior to the fourth edition, the requirements for the schedule 40 products covered by this standard were included in the standard for rigid nonmetallic conduit, ul651.first edition september, 1965second edition august, 1972third edition october, 1980fourth edition may, 1981fifth edition august, 1989sixth edition august, 1995seventh editionoctober 4, 2005the most recent designation of ul 651 as an american national standard (ansi)occurred on may 8, 2007.this ansi/ul standard for safety, which consists of the seventh edition with revisions through may 15, 2007 is under continuous maintenance, whereby each revision is ansi approved upon publication.an effective date included as a note immediately following certain requirements is one established by underwriters laboratories inc.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.revisions of this standard will be made by issuing revised or additional pages bearing their date of issue. a ul standard is current only if it incorporates the most recently adopted revisions, all of which are itemized on the transmittal notice that accompanies the latest set of revised requirements. 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 .isbn 0-7629-1116-6copyright 2005, 2007 underwriters laboratories inc.october 4, 2005schedule 40 and 80 rigid pvc conduit and fittings - ul 6515this pdf standard downloaded from no text on this pageul copyrighted material not authorized for further reproduction or distribution without permission from ulcontentsintroduction1 scope . .52 units of measurement . .6a3 undated references . .6aconstruction4 general . .6a5 bends . .13performance6 general . .147 tensile strength . .147.1 general . .147.2 preparation of specimens . .157.3 conduct of the test . .187.4 results . .188 deflection under heat and load . .198.1 general . .198.2 preparation of specimens . .198.3 apparatus . .198.4 conduct of the test . .229 extrusion process . .2410 low-temperature handling . .2711 water absorption . .2712 resistance to crushing . .2813 resistance to impact . .2914 flame . .3014.1 general . .3014.2 preparations . .3014.3 conduct of the test . .3314.4 evaluation of results . .3315 identification of compound . .3316 tests on integral couplings . .3317 conduit for use with 90c wire . .3417.1 general . .3417.2 up-and-down method . .3418 resistance to specific reagents . .3918.1 general . .3918.2 reagent absorption test . .3918.3 crushing strength test . .4019 sunlight resistance . .4120 pipe stiffness . .4621 pull joint separation . .4622 bending and pull joint separation . .4723 joint water tightness . .4724 elastomeric materials accelerated aging . .4725 permanency of printing . .47this pdf standard downloaded from markings26 details . .50construction fittings27 general . .5128 fabricated fittings . .5829 junction-box adapters . .5930 expansion joints . .5931 threaded adapters . .5932 service-entrance head . .6033 wet-location fittings . .60performance fittings34 general . .6035 water absorption test . .6036 flammability test . .6037 heat-distortion test . .6338 extrusion/molding-process test . .6339 identification tests . .6440 resistance to crushing test . .6441 low-temperature handling test . .6542 bending test . .6543 pull test . .6744 resistance to specific reagents test . .6744.1 general . .6744.2 reagent absorption test . .6744.3 crushing strength test . .6745 nonmetallic service-entrance heads . .6745.1 general . .6745.2 wet-locations test . .6845.3 ultraviolet-light and water test . .7145.4 aging test . .7245.5 impact test . .7245.6 impact test after cold conditioning . .7245.7 heat distortion test . .7345.8 pull tests . .73markings fittings46 general . .7447 details . .7548 carton markings . .75introduction1 scope1.1 these requirements cover schedule 40 and schedule 80 extruded rigid pvc (polyvinyl chloride) electrical conduit and fittings consisting of elbows and other bends made from and for use with this conduit. they also cover couplings, adapters, expansion joints, and similar fittings that are constructed of rigid pvc. the designations schedule 40 and schedule 80 refer to usa trade sizes of conduit having iron-pipe-size outside diameters and specific wall thicknesses. couplings, adapters, expansion joints, and similar fittings are intended to be used with both heavy-wall and thin-wall rigid pvc conduit, elbows, and other bends in accordance with the national electrical code (nec), nfpa 70.1.2 the following restrictions apply to use of the pvc conduit and fittings mentioned in 1.1:a) use at 50c (122f) and lower ambient temperaturesb) use with 75c (167f) wiring, but the conduit and