Formula
For a 3-phase motor, current is estimated from power, line voltage, efficiency, and power factor. Final selection must follow manufacturer and project standards.
VoltCheck24 Engineering Calculator
Motor Breaker Sizing Calculator
Estimate full-load current and practical protection ranges for 3-phase motor feeders, contactors, overload relays, and panel design checks.
Panel Workflow
Use the result with breaker interrupting capacity, overload relay range, cable ampacity, voltage drop, and coordination requirements.
Best Use
This page is useful for early design checks, proposal BOMs, and quick field reviews before final certified engineering approval.