Cable Tray Sizing Calculator
Static · formula-only · worked example computed when this page was built · no live data
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, at a 40% fill limit, 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. Anything the worked example does not state uses this calculator's standard default; the interactive version shows every input and lets you change it.
Worked example (Electrical & Power)
Inputs: a ladder tray carrying ten 25 mm and twenty 15 mm cables over a 3 m span, at a 40% fill limit.
| Result | Value |
|---|---|
| Selected tray width | 300 mm |
| Actual fill | 28.14 % |
| Load class | 8A |
Computed by WorkHive's calculation engine when this page was built; standard: NEMA VE 1-2017 | PEC 2017.
How to use this calculator
- Read the worked example. It uses a ladder tray carrying ten 25 mm and twenty 15 mm cables over a 3 m span, at a 40% fill limit and shows every number in the method.
- Follow the formula with your own figures: it returns Selected tray width, Actual fill, Load class, computed per NEMA VE 1-2017 | PEC 2017.
- To compute interactively, open the Cable Tray Sizing Calculator inside WorkHive's free Engineering Design suite (link below). It runs the same method with your inputs.
FAQ
What is a cable tray sizing calculator fill?
The Cable Tray Sizing Calculator is a free online tool that 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 is free: this worked example is open to everyone, and the interactive calculator runs inside the free Engineering Design suite after a free sign-up (your work is saved to your account). 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, and a free sign-up saves your calculations, BOMs and scope-of-works to your account.