Conduit Fill Visualization

Method & Assumptions

Fill percentage is computed as F = 100 × Σ A_cable / A_conduit.

Variables:

  • A_cable – cross-sectional area of each cable
  • A_conduit – internal area of the conduit

Citations: NEC Chapter 9

Applicability: circular conduits with fill up to 40%.

See also: Load Calculation Formulas, Cable Fill Rules, Routing Assumptions.

Conduit Parameters
Enter Cables
Tag Cable Type Conductors Conductor Size OD (in) Duplicate Remove