路灯线路电气安全防护的目的和要求

The Objective and Requirement on the Electrical Safety of Road Lighting

大多数路灯电缆线路与防火无关联。电气防护的目的，主要是防止人身电击事故，要求及时切断故障，或保证灯杆的安全电压。规定在5秒内切断故障是从防火考虑，不能保证触电安全。IEC479-1规定在正常环境下，50伏是安全电压。

Fire protection is not a concern for the majority of road lighting; the electrical safety for road lighting is principally to protect against electric shock on human body. This requires either the timely cutting off the fault circuit or the guaranteed safety voltage of the pole, The 5 second limit for cutting off lines will be safe for fire but not for electric shock. According to IEC479-1, the safety voltage is 50 volts under nrmal conditions.