Cable Pulling Tension Calculator

About the Cable Pulling Tension Calculator

Estimates the pulling tension for cable through a straight conduit run from the coefficient of friction, cable weight per metre and run length.

How to use this calculator

1. Enter the cable weight per unit length, w Actually use the cable weight per unit length in consistent units such as lb/ft or N/m.
2. Enter the friction coefficient ?[?
3. Enter the conduit length L in the same length units used for the weight rate.
4. Read the estimated pulling tension T from the calculator.

The formula explained

The formula T = [ no, we need valid JSON but content with inline latex. Let's craft carefully.

• T = pulling tension
• \(\mu\) = friction coefficient between the cable and conduit
• w = cable weight per unit length
• L = conduit length

Step by step method

1. Multiply the cable weight per unit length \(w\) by the conduit length \(L\) and the friction coefficient \(\mu\).

Worked example

Problem. Estimate the pulling tension for a cable with \(w = 0.8\,\text{lb/ft}\), \(\mu = 0.25\), and \(L = 120\,\text{ft}\).

1. Use \(T = \mu w L\).
2. Substitute the values: \(T = 0.25 \times 0.8 \times 120\).
3. Compute \(T = 24\,\text{lb}\).

Tips and common mistakes

• Keep the units consistent, because the formula only works correctly when \(w\) and \(L\) match,
• This formula is for a straight conduit, so bends and other path changes will increase the real pulling tension.

Frequently asked questions