新的！IEC 60332-3-25:2018可作为IEC 60332-3-25:2018 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 60332-2-25:2018涵盖D类测试方法，用于在规定条件下评估垂直安装的电线或电缆（电气或光学）的垂直火焰蔓延。本文件仅涉及安装在测试梯上的总直径为12 mm或更小、横截面为35 mm2或更小的小电缆，以实现0.5 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20分钟。安装方法仅以接触形式使用标准梯子的前部。该类别适用于体积非常小的非-需要对金属材料进行评估。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。建议的性能要求见附件B。这第二版取消并取代了2000年出版的第一版和修正案1:20 08。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)所有预先存在的测试类别已被保留和更新； b)添加了一个新类别（D类），以满足非金属体积非常低的测试。 根据IEC指南104，它具有团体安全出版物的地位。

NEW!IEC 60332-3-25:2018 is available as IEC 60332-3-25:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 60332-2-25:2018 covers category D 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 only to small cables of overall diameter 12 mm or smaller and cross-section of 35 mm2 or smaller installed on the test ladder to achieve a nominal total volume of non-metallic material of 0,5 l/m of test sample. The flame application time is 20 min. The method of mounting uses the front of the standard ladder in touching formation only. The category is intended for use with small cables where very low 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) all pre-existing categories of test have been retained and updated;
b) a new category (category D) has been added to cater for testing at very low non-metallic volumes.
It has the status of a group safety publication in accordance with IEC Guide 104.