建筑物的电气设施 第7-715部分:特殊设施或场所的要求 超低压照明设施

[中文适用范围]： 本部分 IEC 60364 的特殊要求适用于由最大额定电压为 50 V 交流电或 120 V 直流电的电源供电的超低电压照明系统的选择和安装。 注 1：超低电压照明系统的定义见 IEC 60598-2-23。 注 2：交流电压以有效值给出。 [外文原描述]： IEC 60364-5-55:2011 The particular requirements apply to extra-low-voltage lighting installations supplied from sources with a maximum rated voltage of 50 V a.c. or 120 V d.c. For the definition of an extra-low voltage lighting system reference should be made to IEC 60598-2-23. This second edition cancels and replaces the first edition, published in 1999, and constitutes a technical revision. The major technical changes with respect to the previous edition are: - the clause numbering is aligned with the present structure of IEC 60364; - references to LED modules and their particular installation requirements have been introduced; - and requirements for cross-sectional area of conductors are modified.