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Useful Installer Tools · Electrical

Breaker Size Guide

Calculate load current from power, voltage, phase and power factor, apply a configurable design margin and show the next common breaker rating as a planning reference. Final protection must match cable ampacity, equipment and local rules.

Inputs

Enter the site/project values below.

Results

Ready

Enter your values and calculate.

Field guidance

How to use this tool properly.

Use these results for planning and verification, then confirm against the actual equipment and site.