Cable Tray Fill

Check tray utilization, compartment loading, and cable packing before routing or export.

Method & Assumptions

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

Variables:

  • A_cable – cross-sectional area of each cable
  • A_tray – usable inside area of the tray

Citations: NEC 392

Applicability: valid for uniform cable loading with fill below 50%.

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

Workspace Preview

Tray Capacity View

Review tray dimensions, compartment assignments, and NEC fill status with a cross-section diagram.

Illustration for tray capacity view
Tray Parameters
Compartment Configuration

Profiles

Save common cable sets and reload them when analyzing similar tray runs.

Cable Entries

Enter required cable data, then draw the tray to validate fill and placement.

Tag*
Cable Type*
Conductors*
Conductor Size*
Cable Rating (V)
Operating Voltage (V)
OD (in)*
Weight (lbs/ft)*
Compartment
Circuit Group
Duplicate Remove

Conductors/Size: Enter the number of conductors and conductor size or pick one of the defaults.
OD & Weight auto-fill if you select a default.

Fill Analysis

Draw the tray to generate the scaled cross-section and compartment warnings.