Should different sizes of cable be pulled together?

Should different sizes of cable be pulled together?

• A. Yes
• B. Sometimes
• C. Never be pulled together
• D. Only if color-coded

Answer: (C)

Uniform tension and consistent movement are essential when pulling cables. Different sizes have different stiffness, bend radii, and friction with the conduit, so a bundle that includes mixed sizes doesn’t pull evenly. The larger, stiffer cables can resist the pull differently from the smaller, more flexible ones, increasing the risk of insulation damage, jackets distorting, or snagging at bends. To avoid these issues, cables should be pulled separately or grouped only with others of the same size. Color-coding helps with identification, but it doesn’t justify mixing sizes in a single pull.

Uniform tension and consistent movement are essential when pulling cables. Different sizes have different stiffness, bend radii, and friction with the conduit, so a bundle that includes mixed sizes doesn’t pull evenly. The larger, stiffer cables can resist the pull differently from the smaller, more flexible ones, increasing the risk of insulation damage, jackets distorting, or snagging at bends. To avoid these issues, cables should be pulled separately or grouped only with others of the same size. Color-coding helps with identification, but it doesn’t justify mixing sizes in a single pull.