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Single Phase Current Calculator
Calculate the current (amps) for a single-phase electrical load from the power (kW), voltage, and power factor. Essential for cable and circuit breaker sizing.
Single Phase Current Formula
Single-phase current: Amps = kW × 1000 ÷ (V × PF). For example, 3 kW at 230V with PF 0.9 = 14.5 amps.
UK single-phase supply is 230V at 50Hz. Most domestic circuits are rated at 13A (socket ring) or 16A–32A (dedicated circuits).
Frequently Asked Questions
How many amps is 3 kW at 230V?
3 kW at 230V single-phase with PF 0.9 = approximately 14.5 amps. This would require a 16A circuit breaker and appropriately sized cable.
What is the UK single-phase voltage?
UK single-phase supply is 230V at 50Hz (nominal). The actual voltage may vary between 216V and 253V in accordance with BS EN 50160.
Single Phase Current Calculator
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