20 kW to Amps — How Many Amps Is 20 kW?
20 kW equals 83.33 amps at 240V (single phase) or 48.11 amps at 240V 3-phase. Common 20kW loads: Large electric furnace, commercial equipment.
20 kW to Amps
83.33 A
at 240V single phase
20 kW Amps at Every Voltage
| Voltage | 1-Phase | 3-Phase |
|---|---|---|
| 120V | 166.67A | 96.23A |
| 208V | 96.15A | 55.52A |
| 240V | 83.33A | 48.11A |
| 277V | 72.20A | 41.69A |
| 480V | 41.67A | 24.06A |
The Formula
Single Phase: Amps = (kW × 1000) ÷ Volts. For 20 kW at 240V: (20 × 1000) ÷ 240 = 83.33A.
Three Phase: Amps = (kW × 1000) ÷ (Volts × 1.732). For 20 kW at 240V 3φ: (20 × 1000) ÷ (240 × 1.732) = 48.11A.
Wire and Breaker for 20 kW
At 240V single-phase (83.3A), recommended: 3 AWG copper with a 85A breaker. Use our Wire Size Calculator for exact sizing.
Disclaimer: Calculations for reference. Consult a licensed electrician.