ULC标准很高兴宣布CAN/ULC-S139-12第二版的发布，即评估电力、数据和光纤电缆完整性的标准防火试验方法。本标准已由ULC火灾试验标准委员会批准，并于2012年11月发布。本标准第二版包括火灾试验要求，以确定电力、数据和光纤电缆的完整性，并评估其保持电路完整性的能力。根据CAN/ULC，为评估电路完整性而测试的电缆应经受火灾暴露- S101，建筑结构和材料耐火试验的标准方法。本标准涵盖的电力、数据和光纤电缆的安装应符合《加拿大电气规范》和《加拿大国家建筑规范》的要求。火灾暴露和软管流测试并不代表所有火灾条件。条件可能会随着火灾荷载的数量、性质、分布、通风、隔间大小和配置以及建筑物的导热和散热特性的变化而变化 安装电缆的隔间。 本标准中的要求提供了在这些规定的火灾暴露条件下可比组件防火性能的相对测量。测试的结构或操作条件的任何变化，如尺寸、装配方法和材料，都可能会极大地改变电缆的电气性能特征。结果代表了确定特定应用中使用的电缆可接受性的一个因素。应用这些测试结果预测实际安装中电缆的电气性能需要仔细评估。

ULC Standards is pleased to announce the publication of the Second Edition of CAN/ULC-S139-12, Standard Method of Fire Test for Evaluation of Integrity of Electrical Power, Data and Optical Fibre Cables. This Standard has been approved by the ULC Standards Committee on Fire Tests and has been published under the date of November 2012.The Second Edition of this Standard includes fire test requirements to determine the integrity of electrical power, data and optical fibre cables and evaluate their ability to maintain circuit integrity.The electrical cables tested for evaluation of circuit integrity are subjected to the fire exposure in accordance with CAN/ULC-S101, Standard Methods of Fire Endurance Tests of Building Construction and Materials.The electrical power, data and optical fibre cables covered by this Standard are installed to comply with the requirements in the Canadian Electrical Code and the National Building Code of Canada.The fire exposure and hose stream tests are not intended to be representative of all fire conditions. It is likely that conditions will vary with changes in the amount, nature, distribution of fire loading, ventilation, compartment size and configuration, and heat conducting and dissipating characteristics of the compartment in which the electrical cables are installed.The requirements in this Standard provide a relative measure of fire performance of comparable assemblies under these specified fire exposure conditions. It is possible that any variation from the construction or operating condition tested, such as size, method of assembly and materials, will substantially change the electrical performance characteristics of the cables.The results represent one factor in determining the acceptability of electrical cables for use in specific applications. Application of these test results to predict electrical performance of cables in actual installations requires careful evaluation.