How much power must a 24 volt generator furnish to a system which contains the following loads? 1 motor 1/5 HP, 3 lights 20 watts each, heating element 5 amp, anticollision light 3 amp

How much power must a 24 volt generator furnish to a system which contains the following loads? 1 motor 1/5 HP, 3 lights 20 watts each, heating element 5 amp, anticollision light 3 amp

• A. 401.2 watts
• B. 450 watts
• C. 372 watts
• D. 522 watts

Answer: (B)

To power multiple loads from a 24 V source, add up the power each load draws. Convert the motor’s horsepower to watts: 1 horsepower equals 746 watts, so 1/5 HP is 0.2 × 746 = 149.2 W. Lights: 3 × 20 W = 60 W. Heating element: P = V × I = 24 V × 5 A = 120 W. Anticollision light: P = 24 V × 3 A = 72 W. Add them together: 149.2 + 60 + 120 + 72 = 401.2 W. So the generator should furnish about 401 watts (roughly 401.2 W). In practice, you’d select a generator rated somewhat higher to cover startup surges, especially for the motor.

To power multiple loads from a 24 V source, add up the power each load draws.

Convert the motor’s horsepower to watts: 1 horsepower equals 746 watts, so 1/5 HP is 0.2 × 746 = 149.2 W.

Lights: 3 × 20 W = 60 W.

Heating element: P = V × I = 24 V × 5 A = 120 W.

Anticollision light: P = 24 V × 3 A = 72 W.

Add them together: 149.2 + 60 + 120 + 72 = 401.2 W.

So the generator should furnish about 401 watts (roughly 401.2 W). In practice, you’d select a generator rated somewhat higher to cover startup surges, especially for the motor.