Question

Consider a feeder that is rated 120 V and serving 5 light bulbs and a refrigerator. All loads are rated 120 V and 120 W. All light loads are connected in parallel. If the feeder voltage is dropped by 30%, compute the following:

a) the power consumption by the loads on the feeder in watts

b) the percentage of reduction in illumination by the feeders

c) do you expect any of the loads on the feeder to be damaged?

d) compute the amount of carbon footprint if coal is used to produce the energy.

(Hint: a 40W incandescent light bulb produces approximately 500 lumens of light.)

Answer 1