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1、Subject 66 1285 Walt Whitman Road Melville New York 11 747-3081 August 21, 2003 TO: SUBJECT: Standards Technical Panel for FLEXIBLE CORD AND FIXTURE WIRE - STP 62 Subscribers to ULs Standards Service for Other Interested Parties Fixture Wire - UL 66, Ist ed Request for STP Members to Vote Request fo
2、r Comments on Proposed Revisions of the ANSI-Approved First Edition of the Standard for Fixture Wire, UL 66: 1. Addition of Silicone Rubber as an Insulation Option for Type RFHH-3 2. Correction of the Insulation Thickness for Types SF-2 and SFF-2 3. Addition of a Supplement for US Government Purchas
3、es of Fixture Wire PROPOSED EFFECTIVE DATE Summary of Topics: These revisions are being issued to add an insulation material, correct an insulation thickness, and add a supplement to the ANSI/UL 66 standard. STP BALLOTS AND ALL COMMENTS DUE: OCTOBER 21,2003 INSTRUCTIONS STP 62 Voting Members: This l
4、etter requests the STP to vote on the above-noted revisions to be included as part of the ANSI-approved First Edition of the UL 66 standard. Appendix A shows the wording changes and rationales. Voting on the revisions is to be completed within 60 days (by October 21, 2003). Please vote on the propos
5、ed revisions using the ballot in Appendix E. Written reasons must support any NO vote. These reasons must be on a sheet separate from the ballot and should include a proposed solution for the problem raised. Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=Army
6、Northwestern Div./7838506130, User=abc, abcdd Not for Resale, 09/09/2006 23:45:06 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 66 -2- AUGUST 21,2003 The impact and effective date statements for the proposed revisions are in Appendix B and are not subject to any v
7、ote. Comments on these aspects of the revisions should be returned separate from the revisions ballot sheet. Subscribers and Other Interested Parties: Subscribers and others interested should discard the ballot. Comments on the proposed revisions and the impact and effective date information should
8、be sent to the STP Secretary. * Please note that all received responses are public and may be circulated to others. All correspondence should reference “Subject 66“. Unless specifically requested to do so, UL will not acknowledge comments indicating concurrence with these proposals. Until adopted an
9、d published with an announced effective date, the UL 66 revisions remain tentative as proposals intended for review and comment only. The UL staff members named in Appendix F are available at any time to interpret proposed or adopted requirements for Fixture Wire. The voting roster in Appendix C sho
10、ws the names, affiliations, and interests of the STP members PRODUCTSANDINDUSTRIESAFFECTED BYTHE PROPOSAL UL requests your assistance 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 the
11、se products and industries be made aware of these requirements prior to their proposed effective date. Also, please forward your suggestions to UL so that these products and industries may be identified in future bu I let ins. UNDERWRITERS LABORATORIES INC. REVIEWED BY: Walter H. Hoffmann Secretary
12、of STP 62 Standards Engineer Standards Department Underwriters Laboratories Inc. 1285 Walt Whitman Road Melville NY 11 747-3081 phone: INT+I 631 271 6200 EXT 22564 fax: INT+I 631 439 6021 e-mail: http:/ Working for a safer world . . . Steven A. Galan Chairman of STP 62 Manager -Wire and Cable Under
13、writers Laboratories Inc. 1285 Walt Whitman Road Melville NY 11747-3081 phone: INT+I 631 271 6200 EXT 22435 fax: INT+I 631 439 6096 e-mail: http:/ Working for a safer world . . . Copyright O 2003 Underwriters Laboratories Inc. LS 03ST398-UL66.1 Copyright Underwriters Laboratories Inc. Provided by I
14、HS under license with ULLicensee=Army Northwestern Div./7838506130, User=abc, abcdd Not for Resale, 09/09/2006 23:45:06 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 66 Type-letter designation Maximum temperature Maximum voltage CONDUCTOR Sizes -Al- RFHH-2 I RFHH-
15、3 I RFH-2 I FFH-2 90C (194F) 75C (167F) 600 18 and 16 AWG AUGUST 21,2003 Metal Stranding APPENDIX A Uncoated or coated copper (6.1.1) Solid or 7-strand Flexi ble-stranded (6.1 .I, 6.2.2, and 6.3.1) (6.1.1, 6.2.2, and 6.3.1) PROPOSED REVISIONS OF THE FIRST EDITION OF THE STANDARD FOR FIXTURE WIRE, UL
16、 66 lay of strands General Material 1. Addition of Silicone Rubber as an Insulation Option for Type RFHH-3 I Continuity, joints, metal coating, and separator (6.5.1 - 7.3) RFHH-3: 90C XL Fable 50.231 of UL 15811 or silicone rubber ITable 50.206 of UL RATIONALE Minimum average thickness The UL 44 Sta
17、ndard for Thermoset-Insulated Wires and Cables includes silicone rubber among the options for insulating 14 AWG and larger sizes of 600 volt Type RHH wire. The physical properties requirements for this silicone insulation are specified in Table 50.206 of the UL 1581 Reference Standard for Electrical
18、 Wires, Cables, and Flexible Cords. For 14 - 10 AWG conductors, 45 mils is specified as the minimum average thickness of the silicone insulation and 40 mils is specified as the minimum thickness at any point of the silicone insulation. A covering is required over the silicone insulation. Type RHH wi
19、re is for use in dry locations with a temperature rating of 90C (194F). RFHH-2, RFH-2, and FFH-2: 30.0 mils or 0.76 mm RFHH-3: 45.0 mils or 1.14 mm (8.3.1) The UL 66 Standard for Fixture Wire includes 16 and 18 AWG sizes of 600 volt Type RFHH-3 wire for use in dry locations at 90C (194F). The insula
20、tion is specified as XL material with an optional covering over the XL. The minimum average and point thicknesses of the XL insulation are specified as 45 and 40 mils. A manufacturer has requested that UL accept 16 and 18 AWG Type RFHH-3 fixture wire made with the same silicone rubber insulation and
21、 thicknesses as on 14 - 10 AWG Type RHH wires and with an extruded covering over the insulation. ULs evaluation of the requested wire has found it acceptable for use as Type RFHH-3. UL therefore proposes to revise the UL 66 standard to add Table 50.206 silicone rubber as an option for 45 mils averag
22、e, 40 mils point thicknesses of insulation on Type RFHH-3 wire with an extruded covering over the insulation. The revisions to accomplish this are shown below under the head i ng PRO POSALS. PROPOSALS Table 4.8 XL insulated Types RFHH-2 and RFHH-3 and XL or rubber insulated Types RFH-2 and FFH-2= Si
23、ze verification I 16.4.1. 6.4.2. and 6.4.3) I 16.4.1. and 6.4.3) I Maximum length of I 48 x individual strand diameter (6.3.2) I (Table 6.2) I 1 5 8 1 1 RFHH-2 a m “ : 90C XL Fable 50.231 of UL 15811 RFH-2 and FFH-2: 75C XL Table 50.241 of UL 15811 or 75C EPDM or SBR/NR rubber Fable 50.54 of UL 1581
24、1 18.1.1 - 8.1.4. 8.2.2.1 and 8.2.2.4) Table 4.8 Continued on Next Page Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130, User=abc, abcdd Not for Resale, 09/09/2006 23:45:06 MDTNo reproduction or networking permitted without lic
25、ense from IHS -,-,- SUBJECT 66 -A2- AUGUST 21,2003 Table 4.8 Continued rype-letter designation Minimum thickness at any point overing over the insulation TESTS ON FINISHED WIRE MARKINGS Physical properties tests of insulation Conductor corrosion test (uncoated copper Continuity test of conductor D-C
26、 resistance test of conductor Spark test only) Deformation test Cold bend test Test for insulation resistance at 60F Flame tests for VW-1 wire felective) Vertical flame test Flexing test of cove ri n a Durability test of ink printing Polarity ID Legibility of printing Sequence of printed markings Re
27、sponsible organization and factorv IDS Temperature ID ID of VW-1 wire Tag, reel, and carton markinas Current desianation Date of manufacture RFHH-2 I RFHH-3 I RFH-2 i FFH-2 RFHH-2, RFH-2, and FFH-2: 27.0 mils or 0.69 mm RFHH-3: 40.0 mils or 1.02 mm (Table 8.1) Silicone-insulated RFHH-3: extruded cov
28、erina f10.3.1.1 and 10.3.2.1) braid (10.1.1 - 10.1.4) Rubber-insulated RFH-2 and FFH-2: saturated braid or wrap or an extruded covering (10.3.1.1 - 10.3.5.4) RFHH-3: 90C XL Fable 50.231 of UL 15811 or silicone rubber ITable 50.206 of UL RFHH-2 a m “ : 90C XL Fable 50.231 of UL 15811 RFH-2 and FFH-2:
29、 75C XL Table 50.241 of UL 15811 or 75C EPDM or SBR/NR rubber Fable 50.54 of UL 15811 (8.2.2.1 and 8.2.2.4) RFHH-2;ftFI II I 2 , XL-insulated RFHH-3, RFH-Z and FFH-2: elective saturated 1 5 8 1 1 500.1 of UL 15811 (6.7.1) (6.5.1, 11.1, and 11.2) (12.1 - 12.3) (13.1) Not applicable (16.1 and 16.2) (1
30、5.1 - 15.7) (17.1) RFHH-2 and RFHH-3: required RFH-2 and FFH-2: not applicable (18.1) Glass braid (10.3.3) Other braid: (10.3.4.4) WraD: 110.3.5.3) Extruded coverina: 110.3.2.1) (20.1) (21.1 and 21.2) (22.1) No sequence is specified (23.1) (24.1 - 24.5) (25.1 and 25.2) (27.1) (28.1) Prohibited 129.1
31、) (30.1) i Index tables are explained in 4.1 Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130, User=abc, abcdd Not for Resale, 09/09/2006 23:45:06 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT
32、 66 -A3- AUGUST 21,2003 10 Covering on Other Wire Types 10.1 Elective braid on Types TF, TFF, and R F H H - 2 - and on XL-insulated Types RFHH-3. RFH-Z and FFH-2 10.1.1 Where employed on wire Types TF, TFF, aRFHH-2- and on XL-insulated wire Types RFHH-3, RFH-Z and FFH-2, a braid shall consist of 150
33、-1/0 or larger fibered-glass yarn in both directions or shall consist of cotton, spun rayon, or silk yarn in both directions or one of these materials in one direction and another of these materials in the other direction. A braid using other textile yarn shall be shown by investigation to be applic
34、able for the particular use - that is, it shall be demonstrated that critical characteristics such as flexibility, temperature rating, and moisture resistance result in a braid comparable to a braid of the named yarn materials. 10.3 Extruded coverina on silicone-insulated TvDe RFHH-3 and braid, wrap
35、, or extruded covering on rubber-insulated Types RFH-2 and FFH-2 10.3.1 General 10.3.1.1 An extruded coverina comdvina with 10.3.2.1 is reauired over silicone rubber insulation on wire TvDe RFHH-3. A fibrous or extruded covering is required over EPDM or SBR/NR rubber insulation on wire Types RFH-2 a
36、nd FFH-2. These wires shall be covered by the following form of fibrous covering or by an extruded covering complying with 10.3.2.1 a) SOLID OR 7-STRAND CONDUCTOR - The fibrous covering shall be a braid of textile yarn complying with 10.3.4.1 - 10.3.4.10, a cotton wrap of textile yarn complying with
37、 10.3.5.1 - 10.3.5.5, or a glass braid complying with 10.3.3.1 - 10.3.3.3. b) FLEXIBLE-STRANDED CONDUCTOR - A wrap shall not be used. The fibrous covering shall be a braid of textile yarn complying with 10.3.4.1 - 10.3.4.10 or a glass braid complying With 10.3.3.1 - 10.3.3.3. 2. Correction of the In
38、sulation Thickness for Types SF-2 and SFF-2 RATIONALE When the 12 and 10 AWG sizes of Types SF-2 and SFF-2 were added to index Table 4.4 as part of the April 28 proposal followed by the July 16 revision pages, an insulation thickness of 45.0 mils minimum average (40.0 mils minimum at any point) was
39、indicated for both sizes instead of only for the 10 AWG size. To match the specification in Table 402.3 of the 2002 National Electrical Code, the insulation thickness for 12 AWG should have been shown as 30.0 mils minimum average (27.0 mils minimum at any point). UL proposes to correct Table 4.4 as
40、shown below under the heading PROPOSAL. PROPOSAL Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130, User=abc, abcdd Not for Resale, 09/09/2006 23:45:06 MDTNo reproduction or networking permitted without license from IHS -,-,- SUB
41、JECT 66 rype-letter designation viaxirnum temperature -A4- SF-1 I SF-2 SFF-1 I SFF-2 200C (392F) 150C (302F) 300 I 600 300 I 600 AUGUST 21,2003 Sizes Metal Table 4.4 Silicone rubber insulated Types SF-I, SFF-1, SF-2, and SFF-2= 18 AWG 18, 16, 14, 12, and 18 AWG 18, 16, 14, 12, and 10 AWG 10 AWG Nick
42、el-base alloy or copper coated with nickel or silver (6.1.1 and 6.1.2) Nickel-base alloy or coated copper (6.1.1 and 6.1.2) Minimum average thickness Minimum thickness at any point viaxirnum voltaae SF-I, SFF-1: 15.0 mils or 0.38 mm SF-2, SFF-2: 18, 16, maximum working voltage; conductor material; t
43、ype of conductor; size of conductor; type of insulation; outer covering if applicable. c. Packaging and marking requirements (see SA4.1). These should include: Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130, User=abc, abcdd No
44、t for Resale, 09/09/2006 23:45:06 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 66 1 2 3 4 -A8- Brown 6 Blue Red 7 Violet (Purple) Orange 8 Gray Yellow 9 White AUGUST 21,2003 (1) Length of wire and form or put-up. Wire is normally furnished in continuous lengths o
45、f 500 or 1000 feet coiled on spools or reels at the contractors option. No more than 25 percent of the total footage of any one wire part or identifying number (PIN) should be shipped in lengths less than minimum, (2) Coil, spool, and reel marking requirements, and (3) Level of preservation, packing
46、, and packaging options required and special or unique storage or time conditions. TABLE SA51 Color-code identification for single-conductor fixture wire I Number designator I Color I Number designator I Color I I O I Black I 5 I Green I Note: This Table is not intended to signify a color sequence,
47、but only a number-color identification reference. Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130, User=abc, abcdd Not for Resale, 09/09/2006 23:45:06 MDTNo reproduction or networking permitted without license from IHS -,-,- SU
48、BJECT 66 Impact Tables and Paragraphs Tables 4.4 and 4.8 Paragraphs 10.1 .I and 10.3.1.1 Supplement paragraphs SA1.l - SA5.1 and Table SA5.1 Standard Number None UL 66 -BI- Proposed Effective Date Date of publication AUGUST 21,2003 APPENDIX B IMPACT STATEMENT AND PROPOSED EFFECTIVE DATE Impact Statement This bulletin proposes a correction and two additions to the standard, none of which require manufacturers to take any action to maintain their current Fixture