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Cable Pulling Tension Calculator (Straight Run)

Estimate the pulling tension needed to install cable through a straight conduit run.

Computed in your browser — nothing you enter is uploaded. Figures are presented for United States against IRC 2024, and every formula is cited under regulatory standards below.

Last verified 2026-08-27 · v1.1.0

Market
Imperial · sales tax
164 ft
Schematic, drawn to the proportions you entered — not to scale on screen.

Estimated pulling tension

294.2 N

Low confidence

This covers a STRAIGHT run only — pulls with bends require adding capstan-equation tension multipliers for each bend, and the calculated tension must be checked against the cable manufacturer's maximum allowable pulling tension (often based on conductor cross-section) before pulling. Consult a qualified installer for multi-bend or long/complex pulls.

Tension in kgf
30 kgf

At the values currently entered, the estimated pulling tension works out to 294. Confidence on this run is low: check the result against a supplier quote or a professional before ordering or building. Figures are shown for United States, where IRC 2024 is the governing residential reference; switch the market above if you are building elsewhere.

Add the equipment this sizes

This result is a specification — 294.2 N — not a quantity. Put the thing it sizes into your project: how many, what you call it, and your supplier’s price.

Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — confirmed fixes become pinned regression tests.

[Schema Verified] Computed in alignment with American Concrete Institute (ACI 318-19) formulas and International Residential Code (IRC 2024) spatial boundaries.

Regulatory standards & verification citations

  • Straight-run pulling tension = cable weight per unit length × pull length × coefficient of friction, the standard basic cable-pulling tension formula for a straight conduit section (per common cable-pulling engineering references, e.g. Southwire's pulling tension guidelines); a typical PVC-conduit-to-cable-jacket friction coefficient is approximately 0.5

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Frequently asked questions

How is straight-run pulling tension calculated?
Tension = cable weight per unit length × pull length × coefficient of friction. This is the standard basic cable-pulling tension formula for a straight conduit section, per common cable-pulling engineering references such as Southwire's pulling tension guidelines.
What friction coefficient should I use?
A typical PVC-conduit-to-cable-jacket friction coefficient is approximately 0.5, though it varies with conduit material, cable jacket type, and whether pulling lubricant is used.
Does this calculator cover conduit runs with bends?
No — this covers a STRAIGHT run only. Pulls with bends require adding capstan-equation tension multipliers for each bend, and the calculated tension must always be checked against the cable manufacturer's maximum allowable pulling tension (often based on conductor cross-section) before pulling. Consult a qualified installer for multi-bend or long/complex pulls.