Key
kVAKilo Volt Amperes
kWKiloWatts
IAmpere
EVolts
PFPower Factor
%EFFPercent Efficiency
HPHorse Power
Simple Electrical Power Calculator
To Determine: | Single-Phase | Three-Phase | Direct Current |
KVA | I x E 1000 |
I x E x 1.73 1000 |
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Kilowatts | I x E x PF 1000 |
I x E x 1.73 x PF 1000 |
I x E 1000 |
Horsepower | I x E x %EFF x PF 746 |
I x E x 1.732 x %EFF x PF 746 |
I x E x %EFF 746 |
Amperes (when HP is known) | HP x 746 E x %EFF x PF |
HP x 746 1.73 x E x %EFF x PF |
HP x 746 E x %EFF |
Amperes (when kW is known) | KW x 1000 E x PF |
KW x 1000 1.73 x E x PF |
KW x 1000 E |
Amperes (when KVA is known) | KVA x 1000 E |
KVA x 1000 1.73 x E |
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NEMA Motor Starter Sizing Chart
NEMA Size | NEMA Continuous Amp Rating | MAX. HP @ 200V AC | MAX. HP @ 230V AC | MAX. HP @ 480/575V AC |
00 | 9 | 1.5 | 1.5 | 2 |
0 | 18 | 3 | 3 | 5 |
1 | 27 | 7.5 | 7.5 | 10 |
2 | 45 | 10 | 15 | 25 |
3 | 90 | 25 | 35 | 50 |
4 | 135 | 40 | 50 | 100 |
5 | 270 | 75 | 100 | 200 |
6 | 540 | 150 | 200 | 400 |
7 | 810 | ----- | 300 | 600 |
8 | 1215 | ----- | 450 | 900 |
9 | 2250 | ----- | 800 | 1600 |