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8. It is required to produce an illumination of 100 lux in a factory hall 30...

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Electrical Engineering

8. It is required to produce an illumination of 100 lux in afactory hall 30 m by 15 m. Assume that the maintenance factor is0.8, coefficient of utilization is 0.4 and efficiency of lamp is 14lm/W. Suggest the suitable rating, the number of lamps and theirpossible arrangement. The sizes of the lamps available are 100,250, 400 and 500 W.

ANS [40 lamps of 250 W in 5 rows]

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Answer & Explanation Solved by verified expert
4.1 Ratings (644 Votes)
Here I have assumed mountingheight to calculate spaceheight ratio    See Answer
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