Bundled Cable Derating Calculator

How Bundled Cable Derating works

The displayed equation is ampacity = base × grouping factor. Bundled Cable Derating uses Single-cable ampacity, Grouping factor to report Bundled ampacity.

With the loaded values, bundled ampacity evaluates to 24.50 A. Test one input at a time and save the original case.

Inputs for Bundled Cable Derating

Single-cable ampacity and Grouping factor belong to Bundled Cable Derating. Keep source units with single-cable ampacity.

Sample entries show the formula in use. They are not substitute ratings for selected equipment.

Single-cable ampacity

Example entry: 35 A.

Grouping factor

Example entry: 0.7.

Reading the Bundled Cable Derating result

This output represents Bundled Cable Derating.

Use the result as a planning quantity before checking available ratings and protective requirements.

Measurement and units

Treat these results as planning arithmetic; conductor and protective-device selection must follow the applicable electrical code and equipment instructions. Check prefixes on single-cable ampacity. For wire resistance, use Wire Resistance Calculator.

Reconcile prefixes and units before comparing outputs.

Limits of this calculation

Spacing and the number of loaded conductors affect the factor.

The calculation focuses on the named relationship and its entered variables. Unentered effects remain outside Bundled Cable Derating.

Bundled Cable Derating record notes

Record source and operating details for single-cable ampacity.

Retain raw bundled ampacity beside its selected rating.

Questions about Bundled Cable Derating