Question 12091 of 749 · Maryland Journeyperson Electrician Exam
Under the NEC 2020 or 2023, which load is left out of a dwelling neutral calculation?
Exactly one answer is correct.
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Correct answer to question 12091
- C: A 240 V central AC unit
Explanation
Only line-to-neutral load contributes to the neutral (220.61). A 240 V air conditioner draws no neutral current, while ranges and dryers count at 70 %.
More questions: Load Calculations
- 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:
- 12093NEC 2020/2023 220.83(A): an existing 1,600 ft2 dwelling with two small-appliance and one laundry circuit, a 12 kW range, 5 kW dryer and 4.5 kW water heater gets no new heating or AC. What is the calculated load?
- 12094NEC 2020/2023 220.83(B): an existing 2,000 ft2 dwelling (two small-appliance and one laundry circuit, 11 kW range, 5.5 kW dryer) adds a 6,000 VA central AC. What is the calculated load?
- 12095Under NEC 2020/2023 220.83, what portion of the existing general load is counted at 100 % before the 40 % factor applies?
- 12098Which is a condition for using the NEC 2020/2023 multifamily optional method of 220.84?
- 12099An existing 200 A service shows a 1-year maximum demand of 110 A. A 40 A load is added. Using NEC 2020/2023 220.87, what is the resulting calculated load?