额定电压 300/500 V 的加热电缆，用于空间加热和防结冰（3.0 版

[中文适用范围]： 本国际标准适用于低温应用的加热电缆，例如舒适加热和防止结冰。该标准适用于额定电压为300/500 V的电缆。工业应用的加热电缆将包含在单独的标准中。该标准仅适用于电缆，不适用于加热系统的任何其他组成部分。它提供了有关使用一根或多根导体的多种结构的信息以及公认的和护套材料的推荐组合。在等于或小于 50 V 的电压下供电的裸导体和受保护导体不包括在本标准的范围内。 [外文原描述]： IEC 60800:2009 is applicable to, and specifies requirements for, resistive heating cables for low temperature applications such as comfort heating and the prevention of ice formation. These cables and cable sets may comprise either factory fabricated or field (work-site) assembled units, and which are heating cables assembled in accordance with manufacturer's instructions. Bare conductors and protected conductors to be supplied at voltages equal to, or less than, 50 V are excluded from the scope of this standard. Typical applications include, but are not limited to - surface heating installed in or under surfaces - direct and storage heating - snow melting and frost protection of roofs, gutters, pipes, etc. Heating cables for industrial and commercial applications are specified in the IEC 62395 series as are mineral insulated heating cables. Applications in which the operating sheath temperature exceeds 100 °C are outside the scope of this standard. The object of this standard is to ensure that electrical resistance heating cables operate safely under their normal defined conditions of use. This is achieved by: - employing heating cables of the appropriate construction that meet the test criteria detailed in this standard - including, for cables with an electrical protective component, a metallic braid, concentric wires or sheath, or other suitable electrically conductive material for protective purposes in case of fault - ensuring that the cables operate at safe temperatures with respect to the materials used in the construction of the cables and their installations according to national regulations. The significant technical changes with respect to the previous edition are as follows - introduction of heating cable sets - testing of heating cable sets, including the integrated cold-lead, cold-lead splice and end-termination in twin and multicore cable sets, in addition to the heating cable - introduction of requirements for installation instructions - reduction to two, instead of three, mechanical classes, one for cables intended for installation with a low risk of mechanical damage (M1) and one for cables intended for installation with a higher risk of mechanical damage (M2) - elimination of reference to specific materials to be used as insulation and sheath - introduction of routine and sample tests.