Diagnostic Test For Electrician License Examination Preparation
Commercial Service Calculations
Time Limit for This Page: 24 minutes
References Permitted: National Electrical CodeŽ, American Electrician's Handbook
Appropriate for Journeyman Electrician, Master Electrician and Electrical Inspector Exams.
Question #1
What is the minimum electric service size for a barber shop where there is 10 kW heat, one 7 1/2 HP AC condenser motor, 660 square feet, 20 general purpose duplex receptacles, no show window, a sign, and 12 kW of other connected load if 120/240 volt single phase?
Question #2
What is the minimum electric service size for an 1800 square foot convenience store with 12 kW of display lighting, 20 kW of equipment (a 2 HP motor is the largest), and 120 feet if show window lighting with a 4 kW sign if 120/240 volt single phase?
Question #3
What is the minimum electric service size for a 2500 square foot branch bank with 5 kW of display lighting, 50 convenience duplex receptacles, 10 kW of heat, 7 1/2 HP AC and 2.2 kW of other connected load if 120/240 volt single phase?
Question #4
What is the minimum electric service size for a 15000 square foot office building with 40 kW of heat, 4 - 10 HP AC condenser units, 140 general purpose duplex receptacles and 46 kW of other connected load if 120/240 volt single phase?
Upon completion, use any remaining time to make sure you have the right answers. When time has expired, go to the answer page to check your answers with the given answers.
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If you did not score three correct in the time allowed, then you might want to consider exam preparation with the help of the David U. Larson workbook: