ul 746c - 电源电子领域最专业的工程师首选论坛-电源网.docVIP

ul 746c - 电源电子领域最专业的工程师首选论坛-电源网.doc

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ul 746c - 电源电子领域最专业的工程师首选论坛-电源网

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 Portable 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 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 are 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. 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. ISBN 0-7629-0721-5 COPYRIGHT ? 1973, 2002 UNDERWRITERS LABORATORIES INC. ANSI/UL 746C-2002 目录 项目 内容 页码 前言 简介 1 范围 6 2 概述 6 3 术语 8 外壳 4 概述 11 5 便携式無人看管家用電器 12 6 (刪除) 7 (刪除) 电气绝缘要求 8 材料性能要求 13 9 内垫板 21 性能要求 10 概述 22 电性能 11 概述 22 12 绝缘强度 22 13 大电流电弧引燃(HAI) 23 14 灼热电阻丝引燃(HWI)-异常过载测试或整机电热棒测试 23 15 斜面漏电起痕电压 23 16 体积电阻率 23 阻燃性 17 阻燃性 - 12mm火焰 25 18 阻燃性 - 20mm火焰 25 19 阻燃性 -127mm(5”)火焰 25 20 塑壳阻燃性 - 746 -5VS 25 21 塑壳阻燃性 - 大面积要求 25 22 防火涂层 26 项目

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