IEC 60332-3-21:2018 在火灾条件下测试电光纤光缆 - 第3-21部分:垂直火焰蔓延垂直安装的聚束线或电缆的测试 - A类F/r

标准编号：IEC 60332-3-21:2018

中文名称：在火灾条件下测试电光纤光缆 - 第3-21部分:垂直火焰蔓延垂直安装的聚束线或电缆的测试 - A类F/r

英文名称：Tests on electric and optical fibre cables under fire conditions - Part 3-21: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category A F/R

发布日期：2018-07-13

标准范围

新的！IEC 60332-3-21:20 18作为IEC 60332-3-21:20 18 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 60332-3-21:20 18涵盖了在规定条件下评估垂直安装的成束电线或电缆的垂直火焰蔓延的试验方法的A类F/R。本文件仅涉及导体横截面积大于35 mm2的电力电缆，该电缆以前后间隔配置安装在测试梯上，以实现7 l/m测试样品的非金属材料的标称总体积。火焰施加时间为40分钟。这种安装方法适用于电缆规范中要求的特殊安装中使用的特殊电缆设计。A类F/R不适用于一般用途。该试验旨在进行型式认可试验。试验用电缆的选择要求见附录A。火焰蔓延被测量为电缆样品的损坏程度。该程序可用于证明电缆限制火焰蔓延的能力。附录B中给出了推荐的性能要求。^第二版取消并取代了2000年出版的第一版。本版构成技术修订版。与上一版相比，此版本包括以下重大技术变更:a)对标题和其他地方进行了调整，以强调该标准适用于光纤电缆以及金属导体类型；b)为了提高重复性和再现性，已经更好地定义了电缆安装在梯子上的方式的细节。根据IEC指南104，它具有团体安全出版物的地位。

NEW!IEC 60332-3-21:2018 is available as IEC 60332-3-21:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 60332-3-21:2018 covers category A F/R for methods of test for the assessment of vertical flame spread of vertically-mounted bunched wires or cables, under defined conditions. This document relates only to power cables of conductor cross-sectional area greater than 35 mm2 installed on the test ladder in a spaced configuration on the front and rear to achieve a nominal total volume of non-metallic material of 7 l/m of test sample. The flame application time is 40 min. This method of mounting is intended for special cable designs used in particular installations when required in the cable specification. Category A F/R is not intended for general use. 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. 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.

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