2. A facility manager replaces all the TS lights in an office when they have reached 80% of their rated life of 20,000 hours. The lights operate for 12 hours each day, 5 days per week for 52 weeks of the year. What is the group re-lamping interval for these lights? a. 3.7 years b. 4.6 years C. 5.1 years d. 6.4 years
2. A facility manager replaces all the TS lights in an office when they have reached 80% of their rated life of 20,000 hours. The lights operate for 12 hours each day, 5 days per week for 52 weeks of the year. What is the group re-lamping interval for these lights? a. 3.7 years b. 4.6 years C. 5.1 years d. 6.4 years
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter1: Electrical Safety
Section: Chapter Questions
Problem 7RQ: Which of the following is the standard by which electrical installations are measured in the United...
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