1.1 本试验方法旨在初步区分材料的耐燃性，因为它们靠近电热丝和其他热源。 2. 1.2 本试验方法适用于厚度小于等于13.0 mm（0.51 英寸）。 1.3 本试验方法适用于在正常室温下为刚性或柔性的材料。在制备过程中，尤其是在中所述的绕线步骤中，尽量减少变形非常重要 10.1 按照第10条“样品制备”中概述的方法。变形示例包括横向或纵向弯曲、扭曲试样以及在绕丝步骤中将钢丝压入试样中，直至肉眼可见。 1.4 以国际单位制表示的数值应视为标准值。 国际单位制后括号中给出的值仅供参考，不被视为标准值。（参见 SI10 了解更多详细信息。） 1.5 本试验方法测量并描述了材料、产品或组件在受控条件下对热量和火焰的响应，但其本身并不包括在实际火灾条件下对材料、产品或组件进行火灾危险或火灾风险评估所需的所有因素。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 防火测试本身就很危险。在进行这些测试时，应采取适当的人员和财产保护措施。 注1: 尽管本试验方法和IEC TS 60695-2-20（已撤销）在方法和细节上有所不同，但使用其中任何一种方法获得的数据在技术上是等效的。 1.8 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 在电气设备（包括电线、电阻器和其他导体）的操作过程中，在某些操作条件下或发生故障时，可能会发生过热。发生这种情况时，可能导致绝缘材料着火。 5.2 本试验方法通过热线源的影响评估电绝缘材料的相对点火电阻。 5.3 本试验方法确定了材料试样在规定试验条件下点燃所需的平均时间（秒）。 5.4 该方法适用于表征材料，受预期精度±15的适当限制 %, 对材料进行分类。 5.5 在该程序中，样本经受一组或多组特定的实验室条件。如果替换了不同的试验条件或改变了最终使用条件，则通过本试验或从本试验中预测测得的耐火试验响应特性的变化并不总是可能的。因此，结果仅适用于本程序中描述的火灾试验暴露条件。

1.1 This test method is intended to differentiate, in a preliminary fashion, among materials with respect to their resistance to ignition because of their proximity to electrically-heated wires and other heat sources. 2 1.2 This test method applies to molded or sheet materials available in thicknesses up to and including 13.0 mm (0.51 in.). 1.3 This test method applies to materials that are rigid or flexible at normal room temperatures. It is important to minimize deformation during preparation, especially during the wire-wrapping step described in 10.1 , by following the method outlined under Clause 10, Sample Preparation. Examples of deformation include bowing, in either a transverse or a longitudinal direction, twisting of the specimen, and indentation of the wire into the specimen during the wire-wrapping step, to a degree visible to the eye. 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. (See SI10 for further details.) 1.5 This test method measures and describes the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment of the materials, products, or assemblies under actual fire conditions. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests. Note 1: Although this test method and IEC TS 60695-2-20 (withdrawn) differ in approach and in detail, data obtained using either are technically equivalent. 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 During operation of electrical equipment, including wires, resistors, and other conductors, it is possible for overheating to occur, under certain conditions of operation or when malfunctions occur. When this happens, a possible result is ignition of the insulation material. 5.2 This test method assesses the relative resistance of electrical insulating materials to ignition by the effect of hot wire sources. 5.3 This test method determines the average time, in seconds, required for material specimens to ignite under the specified conditions of test. 5.4 This method is suitable to characterize materials, subject to the appropriate limitations of an expected precision of ±15 %, to categorize materials. 5.5 In this procedure the specimens are subjected to one or more specific sets of laboratory conditions. If different test conditions are substituted or the end-use conditions are changed, it is not always possible by or from this test to predict changes in the fire-test-response characteristics measured. Therefore, the results are valid only for the fire test exposure conditions described in this procedure.