着火条件下电缆和光纤光缆的试验.第3-10部分:垂直安装的成束电线或电缆的垂直火焰蔓延的试验.A类

[中文适用范围]： IEC 60332 第 3-10、3-21、3-22、3-23、3-24 和 3-25 部分涵盖的系列国际标准规定了评估垂直安装束状火焰垂直蔓延的测试方法。在规定的条件下，电线或电缆，电气或光学。注：就本标准而言，术语“电线或电缆”涵盖所有用于传输能量或信号的绝缘金属导体电缆。该测试旨在进行型式认可测试。附件A给出了测试电缆的选择要求。火焰蔓延的测量是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。 IEC 60332 的这一部分涵盖 A 类，涉及安装在测试梯上的电缆，以实现测试样品的非金属材料标称总体积为 7 l/m。火焰施加时间为40分钟。安装方法采用梯子正面，导体截面大于35mm的电缆根据所需试件数量采用标准梯子或宽梯子，导体截面为35mm的电缆采用标准梯子并且更小。该类别适用于需要评估大量非金属材料的一般用途。附件 B 中给出了推荐的性能要求。 [外文原描述]： IEC 60332-3-22:2000 Specifies method of test for the assessment of vertical flame spread of vertically-mounted bunched wires or cables, electrical or optical, under defined conditions. The test is intended for type approval testing. The requirements for the selection of cables for testing are given. The flame spread is measured as the extent of damage of the cable sample. This procedure may be used to demonstrate the cable's ability to limit flame spread. Covers category A and 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. A recommended performance requirement is also given. It has the status of a horizontal standard in accordance with href="https://webstore.iec.ch/publication/7516">IEC Guide 104 .