Cable Pulling Tension Chart

Use this cable pulling tension chart after the calculator result to document route sections, bends, friction assumptions, sidewall-pressure concerns, manufacturer limits, and field controls before the pull is scheduled.

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Quick reference table

Cable pulling tension is a planning estimate, not a field guarantee. Use the calculator worksheet with cable weight, route length, bends, lubricant, pull direction, sidewall pressure, pulling equipment, manufacturer limits, OSHA jobsite safety expectations, and qualified-person review before the cable is pulled.

Pulling tension route worksheet

Pulling tension route worksheet
Route item	Record before calculating	Why it changes tension
Cable data	Weight, outside diameter, jacket, conductor count, and maximum pulling limit	Sets mechanical load and allowable stress
Straight sections	Length, slope, raceway condition, and direction	Adds friction over the route
Bends	Quantity, angle, radius, and sequence	Can sharply increase tension and sidewall pressure
Lubrication	Product, application method, and compatibility	Changes friction assumptions and cable jacket treatment
Pull setup	Tugger, sheaves, communication, stop point, and crew access	Controls field execution and safety limits

After the pulling calculator result

After the pulling calculator result
Result condition	Field response	Why it matters
Tension near cable limit	Add pull point, reverse pull direction, or redesign route	Avoids damaging insulation or conductor assembly
Sidewall pressure high	Review bend radius, sheave setup, and raceway layout	Cable can be damaged at bends even when total tension passes
Friction assumption uncertain	Confirm lubricant, raceway cleanliness, and pulling method	Small assumption changes can move the result materially
Long route with many bends	Coordinate pull boxes, crew stations, and inspection points	Execution plan can be the limiting factor

Formula basis

Planning pull tension = cable weight and route friction accumulated through straight sections and bends, then compared with manufacturer maximum pulling tension and sidewall-pressure limits.

Cable weight, outside diameter, jacket type, and construction come from manufacturer data or the project cable schedule.
Friction depends on raceway condition, lubricant, bend geometry, pulling direction, and installation method.
Manufacturer maximum pulling tension, sidewall pressure, and equipment capacity control the field plan.

Worked examples

Long feeder pull with several bendsA route that passes conduit fill can still need a new pull point when the calculator result shows tension stacking through several bends.

Reverse pull direction reviewIf one direction puts the highest tension at a difficult bend, rerunning the worksheet in the opposite direction can show whether the pull setup should change.

Assumptions. Balanced load and line-to-line voltage assumptions behind this chart.

This chart is a planning reference and does not replace manufacturer cable pulling limits or jobsite safety planning.
Actual pulling force depends on field conditions, raceway cleanliness, lubricant, equipment setup, communication, and crew method.
Pulling tension review is separate from conduit fill, box sizing, cable tray fill, lockout planning, and energized-work safety review.

Code and standard notes. Planning limits that should be checked before final equipment selection.

Verify pulling plans with cable manufacturer instructions, pulling equipment limits, safety procedures, site conditions, and the AHJ where applicable.
Review OSHA jobsite safety expectations and NFPA 70E electrical safety practices when energized or near-energized work could be involved.

How to use this chart

1Record cable dataUse cable weight, outside diameter, conductor count, jacket type, and manufacturer pulling limits before estimating the route.

2Break the route into sectionsList straight sections, bends, offsets, pull points, elevation changes, and pull direction so the calculator can accumulate tension in the same sequence as the field pull.

3Compare with field limitsUse the calculator result with manufacturer maximum tension, sidewall pressure, tugger capacity, sheave setup, and stop-work criteria.

Worksheet checklist. Record source basis, review gaps, and assumptions before using the chart result.

Map the pull routeSketch straight runs, bends, pull boxes, elevation changes, and the planned pull direction before estimating tension.
Document assumptionsWrite the friction coefficient, lubricant plan, cable weight, bend radius basis, raceway condition, and manufacturer limit used in the calculator.
Plan field controlsRecord pulling equipment, communication method, maximum stop point, inspection steps, and crew responsibilities before the cable is pulled.

Common mistakes to avoid. Review these before turning chart current into an equipment decision.

Assuming a raceway is acceptable because fill is low while ignoring a long route with multiple bends and high pulling force.
Using generic friction assumptions without checking lubricant, raceway condition, cable jacket, bend radius, and manufacturer pulling limits.
Checking total pulling tension but forgetting sidewall pressure at bends where cable damage can occur.

Frequently asked questions

These answers explain how to use the chart without turning a quick reference into a final design decision.

Can conduit fill alone prove a pull is acceptable?

No. Conduit fill checks space. Pulling tension checks mechanical stress through length, bends, friction, sidewall pressure, and equipment setup.

Where should the pulling limit come from?

Use manufacturer cable data and project specifications. Generic estimates should not override listed pulling tension or sidewall pressure limits.

Why does pull direction matter?

Tension accumulates through the route. Pulling from the opposite end can change where peak tension and sidewall pressure occur.