CET Traveling Cables & Wiring Methods

Question 1

What is the primary function of a traveling cable in an elevator system?

Accepted Answer

To carry electrical power and control signals between the fixed hoistway wiring and the moving car

Answer

The traveling cable provides the continuous electrical connection between stationary building wiring and the moving elevator car, carrying both power and control signals throughout the travel range.

Question 2

Traveling cables used in elevator installations must be:

Accepted Answer

Listed specifically for elevator use and capable of withstanding repeated flexing

Answer

Elevator traveling cables must be specifically listed for this application due to the unique demands of continuous flexing, torsion, and hoistway environmental conditions that standard wire cannot withstand.

Question 3

The traveling cable loop in the hoistway must be arranged so that when the car is at the lowest landing:

Accepted Answer

The loop bottom clears the pit floor and all other obstructions in the pit

Answer

The cable loop must never contact the pit floor or any other obstruction to prevent abrasion, pinching, and damage that would create electrical hazards and operational failures.

Question 4

How must traveling cables be attached at the car and at the overhead support point?

Accepted Answer

With strain relief so that conductors are not subjected to tensile stress at terminations

Answer

Strain relief prevents mechanical tension from being transferred to the electrical connections, protecting conductors and terminals from fatigue failures caused by the cable's weight and motion.

Question 5

Per ASME A17.1, traveling cables must maintain adequate clearance from:

Accepted Answer

All hoistway equipment, structural members, and moving components except at designated attachment points

Answer

Traveling cables must be routed to maintain clearance from all equipment and structures in the hoistway to prevent damage from abrasion, pinching, or entanglement during car movement.

(CET) Certified Elevator Technician Practice Test

(CET) Certified Elevator Technician Practice Test

CET Traveling Cables & Wiring Methods