Electrical cable tray occupancy calculator

Calculate single-layer occupied width and remaining width with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use single-layer occupied width and remaining width to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Cable outer diameters (mm)
20,25,15
Required clear gap between cables (mm)
10
Usable tray width (mm)
150
Single-layer occupied width (mm)
80
Remaining width (mm)
70
Width occupancy (%)
53.333333

Try another scenario

Cable outer diameters (mm)
[21, 25, 15]
Required clear gap between cables (mm)
10
Usable tray width (mm)
150
Single-layer occupied width (mm)
81
Remaining width (mm)
69
Width occupancy (%)
54
Calculation method

Calculation method

Single-layer occupied width (mm)

One linear cable layer; sum diameters plus gaps between adjacent cables.

Remaining width (mm)

One linear cable layer; sum diameters plus gaps between adjacent cables.

Width occupancy (%)

One linear cable layer; sum diameters plus gaps between adjacent cables.

Symbols and units
a
Cable outer diameters (mm)
b
Required clear gap between cables (mm)
c
Usable tray width (mm)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • User-supplied measurements and assumptions; One linear cable layer; sum diameters plus gaps between adjacent cables. Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
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