Cable Tray Fill Calculator

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Cable Schedule

OD (mm) kg/m Qty Area (mmΒ²) Action

Tray Parameters

Height (mm) | Spare Capacity (%)

Sizing Results

Total Cable Area 0 mmΒ²
Total Weight 0 kg/m
Min Width Required 0 mm
Recommended Size -
Weight Check OK

*Calculates based on the greater of Area Fill Method (50%) or Single-Layer Width Method (Cable OD Sum).

Technical Notes & Engineering Logic

Variable Definitions

  • OD: Outer Diameter of the cable (mm).
  • Fill Ratio: Percentage of tray cross-section allowed to be filled (NEC/IEC typical 40-50%).
  • Spare: Extra width added for future expansion.

Sizing Logic

  • Method 1 (Area): W = (Total Area × (1+Spare%)) / (Height × Fill%)
  • Method 2 (Width): W = Σ(OD × Qty) (Ensures cables fit in a single layer if required).
  • Result: Calculator selects the maximum width from both methods.

Assumptions

  • Cables are assumed to be laid randomly (power/control).
  • Standard Tray Sizes: 50, 100, 150, 200, 300, 450, 600, 750, 900 mm.
  • Weight check assumes uniform load distribution.
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