What device clears obstructions in conduit, especially where bends occur?

What device clears obstructions in conduit, especially where bends occur?

• A. Reel Brakes
• B. Clevis
• C. Test pull
• D. Mandrel

Answer: (D)

Keeping the conduit clear and smooth for the cable, especially where it bends, is essential to prevent snagging and damage during pulling. A mandrel is designed for this purpose: it is run through the conduit to push out or sweep away debris and burrs, maintaining a smooth bore so the cable can pass safely, even around tight bends. The other items have different roles—reel brakes control spool tension, a clevis is hardware for attaching components, and a test pull checks pulling feasibility—not for clearing obstructions inside the conduit.

Keeping the conduit clear and smooth for the cable, especially where it bends, is essential to prevent snagging and damage during pulling. A mandrel is designed for this purpose: it is run through the conduit to push out or sweep away debris and burrs, maintaining a smooth bore so the cable can pass safely, even around tight bends. The other items have different roles—reel brakes control spool tension, a clevis is hardware for attaching components, and a test pull checks pulling feasibility—not for clearing obstructions inside the conduit.