Breaker Size Selection Calculator

Breaker Size Selection Calculator

Select correct breaker & minimum cable size (IEC / NEC practice)

Simple Mode

Detailed Mode

Load Type Power (W) Current (A)

Total Load Power (W)

Load Current (A)

Voltage (V)

Phase Single Phase Three Phase

Circuit Type General Continuous Motor

Power Factor

Conductor Copper Aluminum

Result

Breaker Rating-

Design Current-

Suggested Cable-

Load Current (A)

Load Type Non-continuous Continuous Motor

Breaker Curve BCD

Ambient Temp (°C)

Installation Open Air Conduit Buried

Detailed Result

Breaker-

Derated Current-

Cable-

Results are indicative. Always verify with IEC / NEC tables and local codes.