前言:这是保险丝盒的统一NCE、CSA集团和UL标准——第12部分:R类。这是NMX-J-009/4248/12-NCE的第二版，CAN/CSA-C22的第二版。2第4248.12号和UL 4248-12第二版。此版本的CAN/CSA-C22。2 No.4248.12取代2007年2月28日出版的前一版。本版UL 4248-12取代2007年2月28日发布的前一版。1概述本部分旨在与熔断器标准一起阅读？第1部分:一般要求，以下简称第1部分。 本部分中条款的编号与第1部分中编号相同的条款相对应。除非本部分修改，否则第1部分的要求适用。对于以下未显示的条款，请参考保险丝座标准？第1部分:一般要求，NMX-J-009-4248-ANCE，CSA C22。2第4248.1号，UL 4248-1。1.1范围1.1.2这些要求包括拟与NMX-J-009/248/12-2000-ANCE、CSA C22中所述R类保险丝一起使用的保险丝座。2个248.12，UL 248-12，低压保险丝？第12部分:R类熔断器。

PrefaceThis is the harmonized ANCE, CSA Group, and UL standard for Fuseholders - Part 12: Class R. It is the second edition of NMX-J-009/4248/12-ANCE, the second edition of CAN/CSA-C22.2 No. 4248.12, and the second edition of UL 4248-12. This edition of CAN/CSA-C22.2 No. 4248.12 supersedes the previous edition published on February 28, 2007. This edition of UL 4248-12 supersedes the previous edition published on February 28, 2007.1 GeneralThis Part is intended to be read together with the Standard for Fuseholders?Part 1: General Requirements, hereafter referred to as Part 1. The numbering of the Clauses in this Part corresponds to like numbered Clauses in Part 1. The requirements of Part 1 apply unless modified by this Part. For Clauses not shown below, refer to the Standard for Fuseholders?Part 1: General Requirements, NMX-J-009-4248-ANCE, CSA C22.2 No. 4248.1, UL 4248-1. 1.1 Scope 1.1.2 These requirements cover fuseholders intended for use with Class R Fuses as described in NMX-J-009/248/12-2000-ANCE, CSA C22.2 No. 248.12, UL 248-12, Low-Voltage Fuses?Part 12: Class R Fuses.