Question 12115 of 749 · Maryland Journeyperson Electrician Exam
Under the NEC 2020 or 2023, what is the minimum number of 15 A, 120 V general lighting branch circuits for a 3,100 ft2 dwelling?
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Correct answer to question 12115
- C: 6
Explanation
Branch circuit count uses 3 VA per ft2 (Table 220.12 in 2020, 220.41 in 2023): 3,100 x 3 = 9,300 VA. A 15 A, 120 V circuit carries 1,800 VA, so 9,300 / 1,800 = 5.17, rounded up to 6 circuits.
More questions: Load Calculations
- 12116How many 20 A, 120 V general lighting branch circuits are required at minimum for a 2,700 ft2 dwelling under the NEC 2020 or 2023?
- 12118Standard method (NEC 2020/2023): the only fastened-in-place appliances are a 1,000 VA dishwasher, an 800 VA disposal and a 4,000 W water heater. What appliance load goes into the calculation?
- 12119Standard method (NEC 2020/2023): a dwelling has a 1,200 VA dishwasher, 700 VA disposal, 5,500 W water heater, 1,000 VA microwave and 600 VA attic fan, all fastened in place. What is the appliance demand load?
- 12021Using the standard method under the NEC 2020/2023, what general lighting load must be included in the service calculation for a one-family dwelling with 2,400 ft2 of livable floor area?
- 12022A 2,000 ft2 dwelling has the minimum two small-appliance circuits and one laundry circuit. Under the NEC 2020/2023 standard method, what is the demand load for general lighting, small-appliance and laundry loads combined?
- 12023A 3,200 ft2 one-family dwelling has three 20 A small-appliance circuits and one laundry circuit. Under the NEC 2020/2023 standard method, what is the net demand load for these loads plus general lighting?