Motor Full-Load Current (FLC) Calculator
Work out the full-load current of a three-phase or single-phase motor from its kW or HP rating — to size the cable, breaker, contactor and overload for your motor control panel.
Estimate a motor's full-load and starting current. For a built, tested motor control panel with the right starter and protection, send us your motor schedule.
Sizing a motor circuit correctly
Right cable & breaker
Full-load current sets the cable cross-section, the circuit-breaker / MCCB rating and the overload-relay setting. Undersizing overheats the cable; oversizing wastes copper.
Starting current matters
A direct-on-line motor draws roughly six times its full-load current for a few seconds at start. For larger motors we use star-delta or soft-starters to limit this inrush.
Built into your panel
We design and build motor control centres (MCC) and pump / HVAC control panels in Dubai, with the correct starter, protection and cabling for each motor.
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Motor full-load current
How do you calculate motor full-load current?
For a three-phase motor, FLC = (output kW × 1000) ÷ (√3 × voltage × power factor × efficiency). For single-phase, drop the √3. This tool does it from the kW or HP rating you enter.
What is the starting current of a motor?
A direct-on-line (DOL) motor typically draws about 6× its full-load current for a few seconds at start. Star-delta or soft-starters reduce this; we specify the right starter for the motor size.
How do I size the cable and breaker for a motor?
Start from the full-load current, then apply cable derating and a breaker / overload rated for the motor and its starting method. Send us the motor details and we will build the control panel with the correct protection.
Need a Multispan part or a custom panel?
Send us a model number or your requirement — our team responds fast with genuine stock, pricing and lead times across the UAE & GCC.