1. What is a Simpull Cable Pull Calculator?

Definition: This calculator estimates the tension required to pull cable through conduit based on friction coefficient, cable weight, and length.

Purpose: It helps electricians and cable installers determine the pulling tension needed for safe and efficient cable installation.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Tension (Newtons)
• \( \mu \) — Friction coefficient (dimensionless)
• \( W \) — Cable weight per unit length (N/m)
• \( L \) — Cable length (meters)

Explanation: The friction coefficient multiplied by cable weight and length gives the pulling tension required.

3. Importance of Cable Pull Calculation

Details: Proper tension calculation prevents cable damage during installation and ensures the pulling equipment is appropriately sized.

4. Using the Calculator

Tips: Enter the friction coefficient (default 0.5), cable weight in N/m, and cable length in meters. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical friction coefficient?
A: For most cable/conduit combinations, 0.5 is typical, but it can range from 0.2 (lubricated) to 0.8 (dry).

Q2: How do I find cable weight?
A: Cable weight per meter is usually provided in the cable specifications or can be measured.

Q3: Does this account for bends in conduit?
A: No, this is for straight pulls. Bends require additional calculations for sidewall pressure.

Q4: What's the maximum safe pulling tension?
A: Typically 0.008 × number of conductors × conductor cross-section area (in mm²), but check cable specs.

Q5: Should I include a safety factor?
A: Yes, consider adding 10-20% to the calculated tension for safety margin.