UL-651A-BULLETINS-2003.pdf
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1、Subject 651A (514B) (in reply, refer to Subject 651A) 1655 Scott Blvd. Santa Clara, CA 95050 June 6, 2003 TO: Standards Technical Panel (STP) for Nonmetallic Conduit and Fittings, STP 651 Subscribers to ULs Standards Service for Type EB and A Rigid PVC Conduit and HDPE Conduit Fittings for Conduit a
2、nd Cable Other Interested Parties SUBJECT: Withdrawal of Proposed Requirements for the Fourth Edition of the Standard for Type EB and A Rigid PVC Conduit and HDPE Conduit, UL 651A In response to a request from industry, UL decided to propose the deletion of all requirements for Type A PVC conduit in
3、 the Subject 651A bulletin dated March 14, 2003. Industry representatives, however, have now indicated that they will continue to manufacture this type of conduit. Therefore, UL has decided to withdraw the proposal and maintain these requirements in UL 651A. The aforementioned bulletin additionally
4、proposed the deletion of paragraph 1 .I2 from the scope of the standard. Please note that consensus has been achieved regarding this issue; therefore, UL intends to delete this paragraph as originally proposed. Attached as Appendix A is a current list of the STP 651 members. Questions regarding inte
5、rpretation of requirements should be directed to the responsible UL staff. Please see Appendix B of this bulletin regarding designated responsibility for the subject product category. UNDERWRITERS LABORATORIES INC. REVIEWED BY: PAUL LLORET Senior Engineering Associate Secretary for STP 651 Standards
6、 Department Santa Clara Office Phone: (408) 876-2410 Fax: (408) 556-6151 E-mail: http:/ Copyright O 2003 Underwriters Laboratories Inc. GEORGE FECHTMANN (Ext. 22858) Chair for STP 651 Conformity Assessment Services 301 6HMEL Melville Office Phone: (631) 271-6200 SR:MK bul-651 a.1-20030606 Copyright
7、 Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 00:59:08 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 651A Name Richard G. Alford Andre R. Carta1 George R. Dauber
8、ger George J. Fechtmann Joseph A. Hertel -Al- Company Interest Category Department City of Seattle User Princeton Borough, Building User Thomas PROPOSED EFFECTIVE DATE INSTRUCTIONS STP Members: If you are a voting member of the STP, complete the attached ballot with your vote on the proposals. Pleas
9、e note that all negative ballots must be accompanied by supporting written reasons and, where possible, proposals for a solution to the problem raised. Impact statements and effective date information are not subject to letter ballot. Therefore, comments regarding impact statements and effective dat
10、es may be made but should be sent to the STP Secretary separate from the letter ballot. Subscribers and other interested parties: If you are a subscriber or other interested party, you may send comments on the proposed requirements, impact statement, and proposed effective date to the STP Secretary.
11、 The STP member ballot should not be used to submit your comments. Comments should be made in writing and may be sent by fax to (408) 556-6045 or by mail to the attention of Paul Lloret at ULs Santa Clara office. Comments may also be sent via E-mail to Paul.E.L. Please reference all correspondence t
12、o Subject 651A. Note that all comments received are public and may be circulated to others. If you respond by fax or E-mail, please include your full name and company name and address to ensure a reply. SUMMARY OF TOPICS This bulletin proposes the following changes in requirements: 1. Withdrawal of
13、all requirements for Type A PVC conduit. 2. Deletion of paragraph 1.12 STP BALLOT AND ALL COMMENTS DUE: May 13,2003. Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 00:59:08 MDTNo reproducti
14、on or networking permitted without license from IHS -,-,- SUBJECT 651A -2- MARCH 14,2003 Please refer to the following attached appendices: Appendix A: Proposed requirements for UL 651A, for your review and comment; Appendix B: Impact statement and proposed effective date, for your review and commen
15、t; Appendix C: STP membership roster; Appendix D: STP ballot instructions; and Appendix E: STP ballot. Questions regarding interpretation of requirements should be directed to the responsible UL Staff. Please see Appendix F of this bulletin regarding designated responsibility for the subject product
16、 categories. Please note that proposed requirements are of a tentative and early nature and are for review and comment only. Current requirements are to be used to judge a product until these requirements are published in final form. PRODUCTSANDINDUSTRIESAFFECTED BYTHE PROPOSAL UL requests your assi
17、stance in identifying other products or industries that might be affected by the requirements contained in this bulletin. UL suggests that all suppliers or customers for these products and industries be made aware of these requirements prior to their proposed effective date. Also, please forward you
18、r suggestions to UL so that these products and industries may be identified in future bu I let ins. Unless specifically requested to do so, UL will not acknowledge comments indicating concurrence with these proposals. UNDERWRITERS LABORATORIES INC. REVIEWED BY: Paul Lloret (Ext. 32410) Secretary for
19、 STP 651 Engineering Associate Standards Department SANTA CLARA OFFICE Phone: (408) 985-2400 Fax: (408) 556-6045 E-mail: Paul.E.L http:/ George Fechtmann (Ext. 22858) Chair for STP 651 Conformity Assessment Services 301 6HMEL Manager I MELVILLE OFFICE Phone: (631) 271-6200 Fax: (631) 439-6048 Email:
20、 George.J.F Copyright O 2003 Underwriters Laboratories Inc. SR: MK bul-651A.4-20030314 Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 00:59:08 MDTNo reproduction or networking permitted wit
21、hout license from IHS -,-,- SUBJECT 651A -Al- MARCH 14,2003 APPENDIX A PROPOSED REQUIREMENTS FOR THE FOURTH EDITION OF THE STANDARD FOR TYPE EB AND A RIGID PVC CONDUIT AND HDPE CONDUIT, UL 651A For your convenience in review, proposed additions to existing requirements are shown underlined, a requir
22、ement that is proposed to be deleted is identified by (DELETED) and is shown tmd-e ; . . . (DELETED) Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 00:59:08 MDTNo reproduction or networking
23、 permitted without license from IHS -,-,- SUBJECT 651A -A2- MARCH 14,2003 Table 3.1 Outside diameter and wall thickness of PVC and high-density PE conduit in inches utside diametei High-density PE conduit VaIl thicknesse! - Trade size of onduit in inches 1 1 2 3 1 4 1 1-114 1-112 2 2-112 3 3-112 4 5
24、 6 Type EB PVC conduit Hig h-density PE conduit Type EBb PVC conduit Min 0.825 1 .O30 1.290 1.635 - 1.870 2.340 2.840 3.460 3.955 4.540 5.508 6.560 Max - a a a a a 0.094 a 0.109 0.124 0.129 0.144 0.164 Avg . 0.840 f0.004 1 .O50 f0.004 1.315 f0.005 1.660 f0.005 1.900 f0.006 2.375 f0.006 2.875 f0.007
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