Estimate cable pulling tension based on run length, cable weight, and total bend degrees. Ensure safe conduit pulls without exceeding conductor tension limits.
Wire pulling tension depends on run length, cable weight, and conduit bends. Each 90° bend roughly doubles the required pulling force due to the exponential friction factor. NEC 358.26 limits conduit runs to 360° of total bends between pull points to keep tension manageable.
Professional Use Only: Verify all results with a licensed electrician before installation.
Common: #12 THHN ≈ 11 lbs | #6 THHN ≈ 39 lbs | 4/0 ≈ 289 lbs
NEC max: 360° between pull points
⚠️ IMPORTANT LEGAL DISCLAIMER
For Reference Only: This calculator is provided for educational and informational purposes only. It is not intended to be a substitute for professional engineering design, advice, or certification.
Code Compliance: Calculations are based on the 2023 National Electrical Code (NEC®). However, local codes, amendments, and Authority Having Jurisdiction (AHJ) requirements vary by location and may supersede standard NEC requirements.
No Liability: SparkShift and its affiliates assume no liability for errors, omissions, or the use/misuse of this tool. Users are solely responsible for verifying all results against applicable codes and standards before installation. Always consult a licensed electrician or engineer.
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