Red Seal Tower Crane Operator Practice Exam

The tower crane transmits electrical power to the cabin using a festoon system or cable reel. This method is practical because it allows for the movement of the crane's cabin while ensuring a continuous supply of electricity.

A festoon system consists of a series of cables or hoses that are supported by a track and can move freely as the crane rotates and elevates. This design minimizes wear on the electrical wiring while providing a safe and reliable means of power transmission. Similarly, a cable reel can wind and unwind as the crane operates, further accommodating the crane's movement without tangling or damaging the cables.

Using a battery system or direct wiring presents challenges in a large, moving structure like a tower crane, particularly regarding maintenance and ensuring sufficient power across different operational heights and reaches. Wireless transmission is not commonly utilized in heavy machinery like tower cranes due to reliability and safety concerns, which makes the festoon system or cable reel the preferred choice for providing electrical power to the cabins effectively.