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# Solution: What is the total current of the lamp required to satisfy the requirements

#### Problem Statement: Electrical Engineering Professional Subjects

Illumination Problem Solving

The illumination of a room is being designed. The data are as follows:

Room length = 30 ft

Room width = 20 ft

Coefficient of utilization = 0.6

Maintenance factor = 70%

Required foot-candle = 50

Lumens per lamp = 3300

Watts per lamp = 53

Voltage = 220 V

Power factor = 75%

What is the total current of the lamp required to satisfy the requirements?

A. 21 A

B. 15 A

C. 7 A

D. 25 A

The total current of the lamp required to satisfy the requirements is equal to 7 Amperes.

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