45 kVA to amps
On a 208 V three-phase system, 45 kVA draws 124.91 amps; at 480 V it draws 54.13 amps, and on 240 V single phase 187.5 amps.
45 kVA to amps at common voltages
| Voltage | Amps, A | Breaker, continuous load, A |
|---|---|---|
| 240 V single phase | 187.5 | 250 |
| 208 V three phase | 124.91 | 175 |
| 240 V three phase | 108.25 | 150 |
| 480 V three phase | 54.13 | 70 |
How to convert 45 kVA to amps
On a three-phase system, amps = kVA × 1,000 ÷ (1.732 × volts): 45 kVA × 1,000 ÷ (1.732 × 208 V) = 124.91 A per line. On single phase, amps = kVA × 1,000 ÷ volts: 45 kVA × 1,000 ÷ 240 V = 187.5 A.
The breaker column assumes a continuous load, sized at 125% of the current, and rounds up to the next standard breaker. Transformers and generators have their own protection rules; follow the nameplate.
Nearby values
| kVA | 208 V three phase, A | 480 V three phase, A |
|---|---|---|
| 15 | 41.64 | 18.04 |
| 30 | 83.27 | 36.08 |
| 45 | 124.91 | 54.13 |
| 75 | 208.18 | 90.21 |
| 100 | 277.57 | 120.28 |
| 150 | 416.36 | 180.42 |
kVA to amps calculator
Convert
kVA
Voltage
Phase
Result
124.91 A
Full-load current on each line. Size breakers and conductors from the nameplate and the code, not from this figure alone.
- Current per line
- 124.91 A
- Breaker at 125% (continuous)
- 175 A
How it is calculated
- Amps = 45 kVA × 1,000 ÷ (208 V × √3) = 124.91