What type of wiring is used to connect the elevator car to the machine room?

The correct choice for connecting the elevator car to the machine room is traveling cable. Traveling cables are specifically designed for elevators and serve as the critical link that allows communication and power transmission between the elevator car and the machine room.

These cables typically contain multiple conductors that handle both the control signals for the elevator’s operation and the electrical power necessary to run various systems within the car, such as lighting and ventilation. Traveling cables are engineered to endure dynamic movement and bending as the elevator travels up and down the hoistway.

In comparison, control wires, power wires, and service cables serve different purposes. Control wires are primarily used for signaling and control functions within the system but do not encompass the necessary power transmission needed throughout the elevator's operational range. Power wires focus solely on delivering electrical power, without the multi-functional capabilities that traveling cables provide. Service cables, while they can be associated with maintenance and monitoring functions, also do not feature the combination of control and power functionality essential to the operation of an elevator system.