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150 amps to watts
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18,000 W
150 amps at 120 V · 36,000 W at 240 V
150 amps to watts by voltage
| Voltage | Watts | kW |
|---|---|---|
| 12 V DC | 1,800 W | 1.80 kW |
| 24 V DC | 3,600 W | 3.60 kW |
| 120 V | 18,000 W | 18.00 kW |
| 208 V | 31,200 W | 31.20 kW |
| 230 V | 34,500 W | 34.50 kW |
| 240 V | 36,000 W | 36.00 kW |
| 208 V three-phase (PF 0.9) | 48,635 W | 48.63 kW |
| 480 V three-phase (PF 0.9) | 112,234 W | 112.23 kW |
Single-phase: W = A × V (power factor 1). Three-phase: W = √3 × A × V × PF; motors and electronics have PF below 1.
FAQ
How many watts is 150 amps?
150 A × 120 V = 18,000 W; at 240 V it is 36,000 W. Watts = amps × volts for resistive single-phase loads.
What breaker do I need for a 150 amp load?
For a continuous load (3+ hours) the NEC sizes the breaker at 125%: 187.5 A → next standard size 200 A. Check local code.
Wire size for a 200 A circuit · Ohm’s law calculator · All amps to watts
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