Electric Current Ratings
Rating
Voltage (Phase)

Example:-

A 2.4kW heater connected to a 230V AC ~ supply.

1) What is the amperage?

I = W/V

I = 2400/230

I = 10.43 amps

2) What is the resistance?

R = V2 / W 

R = 2302/2400

R = 22.04 ohms   

 

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kW 110V(1) 230V(1) 400V+N(3)

0.6

5.45

2.60

0.87

0.75

6.82

3.26

1.08

0.8

7.27

3.48

1.16

1.0

9.09

4.34

1.45

1.25

11.36

5.43

1.81

1.5

13.63

6.52

2.17

2.0

18.18

8.70

2.90

2.25

20.45

9.78

3.26

2.5

22.72

10.87

3.62

3.0

27.27

13.04

4.35

4.0

36.36

17.39

5.80

4.5

40.90

17.56

6.52

5.0

45.45

21.74

7.24

6.0

54.54

26.08

8.70

7.5

68.18

32.60

10.87

10.0

90.90

43.48

14.49

13.0

118.38

56.52

18.84

15.0

136.36

65.21

21.74

16.0

145.45

69.56

23.19

20.0

181.18

86.95

28.90

25.0

227.27

108.70

36.23