UL-719-BULLETINS-2006.pdf
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1、FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Subject 719 November 24, 2006 SUMMARY OF TOPICS The following changes in requirements are being proposed: 1. Revision of UL 719 to Reference the Correct Physical Properties Requirements in UL 1581 for PVC Jacket Material for Type NM Cable
2、 STP BALLOTS DUE: December 25, 2006 COMMENTS DUE: December 25, 2006 For your convenience in review, proposed additions to existing requirements are shown underlined and proposed deletions are shown lined-out. 1. Revision of UL 719 to Reference the Correct Physical Properties Requirements in UL 1581
3、for PVC Jacket Material for Type NM Cable RATIONALE Proposal submitted by: Austin Wetherell, UL. In the 11th edition of UL 719, Table 9.1 provided physical properties requirements for the jacket on Type NM-B cable. The requirements are those for a 75 C jacket - the aging being 10 days at 100 C. Thos
4、e requirements have been in effect ever since the product marking was changed from NM to NM-B, more than 20 years ago. When the 11th edition was revised, and the 12th edition created, the intent was to remove the jacket physical properties table and replace it with a reference to one in UL 1581. Unf
5、ortunately, Clause 9.1.2 of the current 12th edition should have referenced “Table 50.179 of UL 1581”, not Table 50.182, which has multiple options that are not specifi ed. Referencing Table 50.179 will clarify/restore the correct requirement. PROPOSAL 9.1.2 The physical properties of specimens of a
6、 PVC jacket prepared from fi nished cable shall comply with the requirements in Table 50.182 50.179 of UL 1581. See 6.3 for the long-term evaluation of a jacket material not specifi ed in 9.1.1 or not complying with the applicable short-term tests. Copyright 2006 Underwriters Laboratories Inc. Copyr
7、ight Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 12/04/2006 22:18:49 MSTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION NOV
8、EMBER 24, 2006SUBJECT 719-2- No Text on This Page Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 12/04/2006 22:18:49 MSTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERN
9、AL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Subject 719 October 12, 2006 SUMMARY OF TOPICS The following changes in requirements are being proposed: 1. For Preliminary Review Only: Revision of UL 719 to Reference the Correct Physical Properties Requirements in UL 1581 for PVC Jacket Material
10、 for Type NM Cable. COMMENTS DUE: October 26, 2006 This proposal is for review and comment only (no ballot at this time). Please note that comments on a preliminary review document will not receive a response from the proposal author through CSDS. Instead, the proposal author is asked to review the
11、comments received during the preliminary review and adjust the proposals and/or supporting rationale as the author determines to be appropriate. The preliminary review process is an informal mechanism that provides authors with the opportunity to refi ne their proposals before the proposals advance
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