XM lighting metering and distribution box is suitable for single-phase, three-wire or three-phase five-wire end circuits with a rated voltage of 220V or 380V and the total current on single row load not more than 80A. It is used to control and distribute electrical equipment, and protect against overloaded wires, short circuit, electric leakage, and overvoltage. It is a kind of equipment that is used by non-professionals and does not require maintenance.