Calculate minimum pull box and junction box dimensions for straight pulls, angle pulls, and U-pulls per NEC Article 314.28.
Based on NEC 314.28 - Pull and Junction Boxes
Minimum Length
16"
(8 x 2" largest conduit)
Calculation Breakdown
1.Largest conduit trade diameter: 2"
2.Minimum box length = 8 x 2" = 16"
3.Width and depth must accommodate conduit entries and bending radius.
Per NEC 314.28: Straight pulls require 8x the largest conduit. Angle/U-pulls require 6x the largest conduit plus the sum of all other conduits on the same wall.
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.
Verify with Your AHJ: Local Authority Having Jurisdiction (AHJ) requirements take precedence over all general code references. Contact your local building department or electrical inspector to confirm applicable codes, amendments, and permit requirements before beginning any electrical work.
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NEC Reference: NEC 314.28 - Pull and Junction Boxes
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