A pulley-like device used in cable pulls in both conduit and cable tray systems is called a?

A pulley-like device used in cable pulls in both conduit and cable tray systems is called a?

• A. Pulley
• B. Block
• C. Roller
• D. Sheave

Answer: (D)

When guiding and redirecting cable during pulling through conduit or cable tray, you need a wheel with a groove that allows the cable to sit and roll smoothly as it changes direction. That grooved wheel is called a sheave. The term specifically describes the wheel that tracks the cable, reducing friction and preventing damage to the cable jacket as it routes through bends. A pulley is a general term for a wheel used to change the direction of a rope or belt, but in electrical installation vocabulary, the focused component used in cable pulls is the sheave. A block refers to the housing or assembly that contains a pulley or sheave. A roller is typically a smooth wheel used for general support or guiding loads and does not imply the grooved guiding feature the cable needs. So, the device described is the grooved guiding wheel—the sheave.

When guiding and redirecting cable during pulling through conduit or cable tray, you need a wheel with a groove that allows the cable to sit and roll smoothly as it changes direction. That grooved wheel is called a sheave. The term specifically describes the wheel that tracks the cable, reducing friction and preventing damage to the cable jacket as it routes through bends.

A pulley is a general term for a wheel used to change the direction of a rope or belt, but in electrical installation vocabulary, the focused component used in cable pulls is the sheave. A block refers to the housing or assembly that contains a pulley or sheave. A roller is typically a smooth wheel used for general support or guiding loads and does not imply the grooved guiding feature the cable needs.

So, the device described is the grooved guiding wheel—the sheave.