Cable Tray Sizing Calculator
The Cable Tray Sizing Calculator picks the tray width that keeps cable fill within the NEC/NEMA limit for a bundle of cables. Example: for a ladder tray carrying ten 25 mm and twenty 15 mm cables over a 3 m span, Selected tray width = 300 mm, Actual fill = 28.14 %, Load class = 8A (per NEMA VE 1-2017 | PEC 2017).
How it works
Computed from your inputs per NEMA VE 1-2017 | PEC 2017.
Worked example (Electrical & Power)
Inputs: a ladder tray carrying ten 25 mm and twenty 15 mm cables over a 3 m span.
| Result | Value |
|---|---|
| Selected tray width | 300 mm |
| Actual fill | 28.14 % |
| Load class | 8A |
Computed live by WorkHive's calculation engine; standard: NEMA VE 1-2017 | PEC 2017.
How to use this calculator
- Enter the figures for the duty you are sizing: the worked example below uses a ladder tray carrying ten 25 mm and twenty 15 mm cables over a 3 m span.
- The calculator returns Selected tray width, Actual fill, Load class, computed per NEMA VE 1-2017 | PEC 2017.
- Check the worked example to confirm the method matches how you would do it by hand, then run your own numbers in the interactive tool.
FAQ
What is a cable tray sizing calculator fill?
The Cable Tray Sizing Calculator is a free online tool that computes picks the tray width that keeps cable fill within the NEC/NEMA limit for a bundle of cables. It shows the formula and a fully worked example so you can check the method, not just the number.
How is it calculated?
The result is computed from your inputs following NEMA VE 1-2017 | PEC 2017. The worked example on this page shows a real computation with real numbers.
Is the calculator free?
Yes. WorkHive's engineering calculators are free to use, no sign-up needed for the tools. WorkHive is a free, offline-first maintenance platform built for Philippine industrial plants.
Run it on your own numbers
Open the interactive Cable Tray Sizing Calculator in WorkHive: free, no sign-up needed for the calculators.