What do the five parties refer to in a five-party elevator call

The "five parties" in the five-party intercom refer to: (1) A duty room with 24-hour on-duty personnel. (2) Elevator Machine Room. (3) Inside the elevator car. (4) Elevator car roof. (V) Elevator pit. When doing the wiring for a five-party intercom, these five parties should be connected according to the design requirements. The wiring in the hoistway can be laid in the cable tray boxes fixed to the hoistway wall. (Switch the elevator to maintenance mode, operate the slow car on the top of the car, and pay attention to safety.) When there are joints in the middle of the line, an intermediate junction box should be installed.

Generally, the first four sides use the accompanying cables of the elevator, such as the machine room, the bottom pit, the inside of the car, the top of the car, and the duty room. Except for the duty room which requires separate wiring, all others are connected with standard cables at the factory and no additional wiring is needed.