15 kW to Amps — How Many Amps Is 15 kW?
15 kW equals 62.50 amps at 240V (single phase) or 36.09 amps at 240V 3-phase. Common 15kW loads: Electric furnace, tankless water heater.
15 kW to Amps
62.50 A
at 240V single phase
15 kW Amps at Every Voltage
| Voltage | 1-Phase | 3-Phase |
|---|---|---|
| 120V | 125.00A | 72.17A |
| 208V | 72.12A | 41.64A |
| 240V | 62.50A | 36.09A |
| 277V | 54.15A | 31.27A |
| 480V | 31.25A | 18.04A |
The Formula
Single Phase: Amps = (kW × 1000) ÷ Volts. For 15 kW at 240V: (15 × 1000) ÷ 240 = 62.50A.
Three Phase: Amps = (kW × 1000) ÷ (Volts × 1.732). For 15 kW at 240V 3φ: (15 × 1000) ÷ (240 × 1.732) = 36.09A.
Wire and Breaker for 15 kW
At 240V single-phase (62.5A), recommended: 4 AWG copper with a 70A breaker. Use our Wire Size Calculator for exact sizing.
Disclaimer: Calculations for reference. Consult a licensed electrician.