Whether you need to pass a master or journeyman electrical exam you’ll need to know how to properly interpret and apply the code articles and formulas required to answer commercial service calculation questions.
What is the demand on the service for the general lighting in a 15,000 sq.ft. church?
Step #1
Refer to Table 220.12 to find the minimum VA per square foot required for a church.
15,000 sq.ft. x 1 va = 15,000 va
Step #2
Since the lights in the church will be on for three hours or more the lighting load is continuous according to Article 100 “Definitions.” Article 215.2 and 230.42(a)(1) require that continuous loads be increased by an additional 25%.
15,000 va x 1.25 = 18,750 va
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