着火条件下电缆的试验第3-22部分:垂直安装的成束电线或电缆的垂直火焰蔓延试验A类

[中文适用范围]： 本部分 IEC 60332 涵盖了在特定条件下对垂直安装的成束电线或电缆（电气或光学）垂直火焰蔓延评估的测试方法类别A。 本文件涉及安装在测试梯上的电缆，以实现测试样品非金属材料的标称总体积为7升/米。火焰施加时间为40分钟。安装方法使用梯子的前部，对于导体截面积大于35平方毫米的电缆，根据所需测试件数量使用标准或宽梯，而对于导体截面积为35平方毫米及以下的电缆使用标准梯。该类别适用于需要评估高体积非金属材料的一般用途。 该测试旨在用于型式认可测试。选择测试电缆的要求见附录A。火焰蔓延通过电缆样品的损坏程度来测量。此程序可用于展示电缆限制火焰蔓延的能力。 附录B给出了推荐的性能要求。 注：在本文件中，术语“电线或电缆”涵盖用于传输能量或信号的所有绝缘金属导体电缆。 [外文原描述]： IEC 60332-3-22:2018 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60332-3-22:2018 covers category A for methods of test for the assessment of vertical flame spread of vertically mounted bunched wires or cables, electrical or optical, under defined conditions. This document relates to cables installed on the test ladder to achieve a nominal total volume of non-metallic material of 7 l/m of test sample. The flame application time is 40 min. The method of mounting uses the front of the ladder, a standard or wide ladder being used for cables having a conductor cross-section greater than 35 mm2 according to the number of test pieces required, and a standard ladder for conductor cross-sections 35 mm2 and smaller. The category is intended for general use where high volumes of non-metallic material are required to be evaluated. The test is intended for type approval testing. The requirements for the selection of cables for testing are given in Annex A. The flame spread is measured as the extent of damage of the cable sample. This procedure can be used to demonstrate the cable’s ability to limit flame spread. A recommended performance requirement is given in Annex B. This second edition cancels and replaces the first edition published in 2000 and Amendment 1:2008. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) adjustments have been made to the title, and elsewhere, to emphasise the standard is applicable to optical fibre cables as well as metallic conductor types; b) details of the way in which cables are mounted on the ladder have been better defined in order to improve repeatability and reproducibility. It has the status of a group safety publication in accordance with IEC Guide 104.