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Cable Pulling Tension Formula:
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The Cable Pulling Tension Formula calculates the output tension (T_out) based on input tension (T_in), friction coefficient (μ), and angle (θ). This equation is essential for determining the force required to pull cables through conduits or around bends without damaging the cable.
The calculator uses the cable pulling tension formula:
Where:
Explanation: The formula shows how tension increases exponentially as the cable is pulled around bends, with the rate of increase determined by the friction coefficient.
Details: Accurate tension calculation is crucial for preventing cable damage during installation, ensuring proper cable performance, and determining the appropriate pulling equipment needed for the job.
Tips: Enter input tension in N or lb, friction coefficient (typically 0.1-0.5 for most cable/conduit combinations), and angle in radians. All values must be non-negative.
Q1: What are typical friction coefficients for cable pulling?
A: Friction coefficients typically range from 0.1 to 0.5, depending on the cable jacket material and conduit type.
Q2: How do I convert degrees to radians?
A: Multiply degrees by π/180. For example, 90° = 90 × π/180 = π/2 radians.
Q3: What is the maximum tension a cable can withstand?
A: Maximum tension varies by cable type and size. Consult manufacturer specifications for specific cable ratings.
Q4: Does this formula account for multiple bends?
A: For multiple bends, calculate tension sequentially, using the output tension from one bend as the input tension for the next.
Q5: When should I use a cable lubricant?
A: Cable lubricant should be used when calculated tensions approach or exceed cable ratings, as it can significantly reduce the friction coefficient.