Practice Questions: Load Calculation
Real questions from our bank, all referenced to NEC 2026. Tap “Show explanation” after you answer.
Calculate the general lighting load for a dwelling with an area of 2,500 square feet.
- A6,250 VA
- B7,500 VA
- C8,750 VA
- D10,000 VA
Show explanation
Per NEC 220.12, dwelling lighting loads are 3 VA per square foot. Calculation: 2,500 sq ft × 3 VA/sq ft = 7,500 VA.
What is the general lighting load for an office building with 4,200 square feet?
- A12,600 VA
- B14,000 VA
- C14,700 VA
- D16,800 VA
Show explanation
Per NEC 220.12, office building lighting loads are 3.5 VA per square foot. Calculation: 4,200 sq ft × 3.5 VA/sq ft = 14,700 VA.
Calculate the lighting load for a retail store with 3,500 square feet of floor area.
- A5,250 VA
- B7,000 VA
- C8,750 VA
- D10,500 VA
Show explanation
Per NEC 220.12, retail store lighting loads are 2 VA per square foot. Calculation: 3,500 sq ft × 2 VA/sq ft = 7,000 VA.
What is the general lighting load for a warehouse with 8,000 square feet?
- A4,000 VA
- B8,000 VA
- C12,000 VA
- D16,000 VA
Show explanation
Per NEC 220.12, warehouse lighting loads are 1 VA per square foot. Calculation: 8,000 sq ft × 1 VA/sq ft = 8,000 VA.
Calculate the lighting load for a restaurant with a floor area of 2,800 square feet.
- A4,200 VA
- B5,600 VA
- C7,000 VA
- D8,400 VA
Show explanation
Per NEC 220.12, restaurant lighting loads are 2 VA per square foot. Calculation: 2,800 sq ft × 2 VA/sq ft = 5,600 VA.
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