1、November 29,2001 5 Polymeric Materials Use in Electrical Equipment Evaluations UL 746C ( ) 1 NOVEMBER 29, 2001 (Title Page Reprinted: November 5, 2002) 1 UL 746C Standard for Polymeric Materials Use in Electrical Equipment Evaluations The first edition was titled Test for Polymeric Enclosures of Por
2、table Electrical Appliances and numbered UL 746.51. First Edition June, 1973 Second Edition March, 1978 Third Edition May, 1989 Fourth Edition December, 1995 Fifth Edition November 29, 2001 The most recent approval of UL 746C as an American National Standard (ANSI) occurred on September 23, 2002 and
3、 covers the Fifth Edition, including revisions through November 5, 2002. Approval of UL 746C as an American National Standard is maintained using the continuous maintenance process. Comments or proposals for revision on any part of the Standard may be submitted to UL at any time. Written comments ar
4、e to be sent to the UL-MEL Standards Department, 1285 Walt Whitman Road, Melville, NY 11747. 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 746C on November 3, 1988. T
5、he 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, al
6、l of which are itemized on the transmittal notice that accompanies the latest set of revised requirements. ISBN 0-7629-0721-5 COPYRIGHT 1973, 2002 UNDERWRITERS LABORATORIES INC. ANSI/UL 746C-2002November 29,2001 5 Polymeric Materials Use in Electrical Equipment Evaluations UL 746C ( ) 2 1 6 2 6 3 8
7、4 11 5 12 6 7 8 13 9 21 10 22 11 22 12 22 13 HAI 23 14 HWI- 23 15 23 16 23 17 - 12mm 25 18 - 20mm 25 19 -127mm 5 ” 25 20 - 746 -5VS 25 21 - 25 22 26November 29,2001 5 Polymeric Materials Use in Electrical Equipment Evaluations UL 746C ( ) 3 23 27 24 27 25 27 26 28 27 28 28 29 29 30 30 30 31 30 32 30
8、 33 31 34 - 31 35 31 36 32 37 35 38 35 39 36 40 38 41 - 39 42 39 43 39 44 40 45 40 46 40 47 41 48 41November 29,2001 5 Polymeric Materials Use in Electrical Equipment Evaluations UL 746C ( ) 4 49 41 50 42 51 42 52 - 12mm 44 53 - 3/4 ” 45 54 -127mm 5 ” 46 55 - 746 -5VS 46 56 48 57 49 58 50 59 53 60 5
9、8 61 58 62 58 63 59 64 59 65 59 66 59 67 60 68 60 69 - 62 70 - 63 71 - 64 72 68 73 72 74 74 75 75 76 77November 29,2001 5 Polymeric Materials Use in Electrical Equipment Evaluations UL 746C ( ) 5 A. “ ” B. C. D. E.UL UL UL UL F.UL November 29,2001 5 Polymeric Materials Use in Electrical Equipment Ev
10、aluations UL 746C ( ) 6 1. 1.1 1.2 “Standard for Systems of Insulating Materials, General”, UL 1446 1.3 1.4 2. 2.1 SI 2.2 2.3 2.1 2.4UL 94 UL 746A“Standard for Polymeric Materials Short Term Property Evaluations” UL 746B“Standard for Polymeric Materials Long Term Property Evaluations” UL 746D“Standa
11、rd for Polymeric Materials Fabricated Parts” 2.5 UL 746D“Standard for Polymeric Materials Fabricated Parts” November 29,2001 5 Polymeric Materials Use in Electrical Equipment Evaluations UL 746C ( ) 7 2.1 UL 746C November 29,2001 5 Polymeric Materials Use in Electrical Equipment Evaluations UL 746C
12、( ) 8 3. 3.1 3.2 3.3Delete 3.4 3.5 3.6 CTI UL 746A“Standard for Polymeric Materials Short Term Property Evaluations” CTI PLC 600TI 0 400TI 600 1 250TI 400 2 175TI 250 3 100TI 175 4 0 TI 100 5 3.7 3.8 3.9 3.10 3.11 a / b 3.12 3.13 3.14 UL 94 “Test for Flammability of Plastic Materials for Parts in De
13、vice and November 29,2001 5 Polymeric Materials Use in Electrical Equipment Evaluations UL 746C ( ) 9 Appliance” 3.15 UL 746A“Standard for Polymeric Materials Short Term Property Evaluations” 3.16 3.17 3.18 HAI UL 746A“Standard for Polymeric Materials Short Term Property Evaluations” HAI NA PLC 120N
14、A 0 60NA120 1 30NA60 2 15NA30 3 0 NA15 4 3.19 HWI UL 746A“Standard for Polymeric Materials Short Term Property Evaluations” HWI PLC 120IT 0 60IT 120 1 30IT 60 2 15IT 30 3 7 IT 15 4 0 IT 7 5 3.20 3.21IEC GWIT) IEC 60695-2-1/3 GWIT 25 0 C 0 C 3.22IEC GWFT IEC 60695-2-1/2 GWFT 30 3.23 3.24 November 29,
15、2001 5 Polymeric Materials Use in Electrical Equipment Evaluations UL 746C ( ) 10 3.25 3.26 3.27 3.28 3.29 PLC / 3.30 3.31 3.32 3.33 3.34 , a) 42.4V b) 1500 ohm 0.5mA 3.35 a 42.4V 1 8A 8A b 15W 3.36 3.37 3.38 3.39 3.40 3.41 3.42 November 29,2001 5 Polymeric Materials Use in Electrical Equipment Eval
16、uations UL 746C ( ) 11 4. 4.1 4.1 4.2 UL 746A“Standard for Polymeric Materials Short Term Property Evaluations” 4.3 5VA 5VB V- 0 V- 1 V- 2 HB 4.1 II V- 0 4.4 2cm 3 3cm 5VA 5VB V-0 V-1 V-2 HB 4.5 22 4.1 I II III K HB a,d Vb,d 5V A c,d 8.1 YES YES YES 24 YES YES YES 23.1 NO NO YES 29.1 YES YES YES 30.
17、1 YES j NO j YES 31.1 YES e YES e YES e 32.1 YES NO YES 33.1 YES f YES f YES f 27.1 YES g YES g YES g 28 YES h YES h YES h 28.2 YES YES YES NO NO YES i a HB GWIT GWFT 750C, 17 18 12 mm 20 mm b V=V-0, V-1 V-2 17 18 12 mm 20 mm HB 5 c 5VA 127 mm 19 d 21 e HB 63.2 V,5VA 12 mm 20 mm 63.1 f g h i j HB k II November 29,2001 5 Polymeric Materials Use in Electrical Equi
