Answered: A meeting hall in an organization is to…

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter25: Television, Telephone, And Low-voltage Signal Systems

Section25.2: Telephone System

Problem 2R: At what height are the telephone outlets in this residence mounted? Give measurement to center....

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A meeting hall in an organization is to be provided with a lighting installation. The hall is 30 m × 20 m × 8 m (high). The mounting height is 5 m and the required level of illumination is 144 lm/m². Design a lighting system for the hall with the given data.

Lumens/watt for 200-W lamp = 12 and

Lumens/ watt for 500-W lamp = 16.

Utilization coefficient = 0.6

Maintenance factor = 0.75

space/height ratio=1

Using metal filament lamps, estimate the following:

Flux
Luman output per 200 W lamp
Luman output per 500 W lamp
Number of 500W lamps required
Number of 220W lamps required
Draw the spacing layout of these lamps
State the reason if any of these 2 lamps cannot be arranged in the hall with the given specification.
What is the significance of ‘room surface maintenance factor’ and ‘utilization factor’ in the lighting design

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