Question 12026 of 844 · Washington 01 Journey Level Electrician Exam
Optional method (NEC 2020/2023), 120/240 V service: 1,800 ft2 dwelling, two small-appliance and one laundry circuit, 11 kW range, 5.5 kW dryer, 1,000 VA dishwasher, 800 VA disposal, 4 kW water heater, 6,000 VA central AC and 8 kW central electric furnace. What is the calculated load in amperes?
Exactly one answer is correct.
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Correct answer to question 12026
- B: 103.7 A
Explanation
General loads total 32,200 VA; first 10,000 VA at 100 % plus 40 % of 22,200 VA = 18,880 VA (220.82(B)). Heating/AC: the larger of 100 % AC (6,000 VA) or 65 % of the central heat (5,200 VA), so 6,000 VA (220.82(C)). 24,880 VA / 240 V = 103.7 A.
More questions: Load Calculations
- 12027Optional method (NEC 2020/2023): a 1,500 ft2 dwelling with two small-appliance and one laundry circuit, a 10 kW range, 5 kW dryer and 4.5 kW water heater has six separately controlled 2 kW baseboard heaters and a 4,000 VA AC unit. What is the total calculated load?
- 12032A dwelling has one electric dryer rated 3,800 W. What load must be used for it in the NEC 2020/2023 service calculation?
- 12089A dwelling feeder includes a 6.4 kW range demand. What neutral load is assigned to it under the NEC 2020 or 2023?
- 12090A 120/240 V service has a maximum unbalanced load of 280 A. What neutral load is used under the NEC 2020 or 2023?
- 12091Under the NEC 2020 or 2023, which load is left out of a dwelling neutral calculation?
- 12092Under the NEC 2020 or 2023, the optional method of 220.82 may be used for a single dwelling when the service or feeder is: