Practice Test GeeksNEC Practice Test
← All NEC Flashcard Decks

Load Calculation Applications Flashcards

7 cards from real NEC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Load Calculation Applications flashcards as text

  1. For a multifamily dwelling feeder serving 20 units, NEC Table 220.42 applies demand factors to general lighting. After the first 120,000 VA at 35%, what demand factor applies to the remainder?

    Answer: 25%

    NEC Table 220.42 applies 25% to the portion of the general lighting load that exceeds 120,000 VA for dwelling units.

  2. When the air conditioning load exceeds the heating load in a dwelling, per NEC 220.60, which load is omitted from the calculation?

    Answer: The heating load is omitted

    NEC 220.60 (noncoincident loads) allows the smaller of two loads that will not be energized simultaneously to be omitted; typically the heating load is omitted when AC exceeds it.

  3. A 2,500 sq ft dwelling has a 240V/120V single-phase service. What is the general lighting load before demand factors?

    Answer: 7,500 VA

    General lighting load = 2,500 sq ft × 3 VA/sq ft = 7,500 VA per NEC 220.12.

  4. Under NEC 220.82(C), what demand factor is applied to the portion of the total connected load exceeding 8 kVA in the optional calculation for a single dwelling unit?

    Answer: 40%

    NEC 220.82(C) applies a 40% demand factor to all connected loads above 8 kVA in the optional method for single dwelling units.

  5. Per NEC 220.14(A), what is the unit load for receptacle outlets in other-than-dwelling occupancies when calculating branch-circuit load?

    Answer: 180 VA per outlet

    NEC 220.14(A) specifies 180 VA per receptacle outlet for general-use receptacles in non-dwelling occupancies.

  6. When calculating the service load for a dwelling with two 240V/30A small appliance circuits and one laundry circuit, what total load in VA is assigned to these circuits before demand factors?

    Answer: 4,500 VA

    Three circuits × 1,500 VA each = 4,500 VA; NEC 220.52 requires a minimum of 1,500 VA per small appliance and laundry circuit.

  7. A commercial building has 50,000 sq ft of office space. Using NEC Table 220.12, what is the minimum general lighting load in VA?

    Answer: 175,000 VA

    NEC Table 220.12 assigns 3.5 VA/sq ft for office spaces; 50,000 × 3.5 = 175,000 VA.