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Engineering Calculators

Motor current, wire gauge, power supply sizing, and contactor selection tools.

Motor current calculator

Estimate full-load current for 3-phase and single-phase motors from power (kW) and voltage.

Wire gauge calculator

Select conductor size for given current and cable length. Voltage drop and ampacity.

Power supply sizing

Size 24V DC power supply for sensors, PLC I/O, and control circuits.

Contactor sizing

Select contactor current rating from motor power and voltage.