Lighting lamps and lanterns of small knowledge | general common voltage is how many? What is the safety voltage? - China lighting network

The single-phase voltage for low voltage distribution network in China are based on ac 50 hz, 220 v, so, in addition to the need to use safe voltage power supply parts of lamps and lanterns, average commonly used lamps and lanterns of voltage is ac 220 v. Safety voltage is used to prevent electric shock accident specific power supply voltage of the series, the series voltage upper limit under normal and fault conditions, any voltage between any two conductors or conductors and ground are no more than communication ( 50Hz) RMS 50 v. Safety voltage class is divided into 50 v, 42 v, 36 v, 24 v, 12 v, 6 v, usually should be selected according to use environment, use factors such as different safety voltage. For example, if in the cable tunnel, lighting lamps and lanterns can choose 36 v safety voltage power supply; The safety of the underwater lights should choose no more than 12 v voltage of power supply. This particular power supply is to point to by special safety voltage power supply, the power supply input circuit and output circuit must be carried out on the isolation circuit, and work under safe voltage circuit, must have nothing to do with any other electrical system and electrically conductive parts for electrical isolation. YanZhiXiang

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