Journeyman Electrician’s Exam Journeyman Electrician's Load Calculations 1 — Questions and Answers
Question 1: According to NEC Table 220.12, what is the unit lighting load for a dwelling unit?
- 1 VA/sq ft
- 2 VA/sq ft
- 3 VA/sq ft (Correct answer)
- 4 VA/sq ft
Correct answer: 3 VA/sq ft
NEC Table 220.12 specifies 3 VA per square foot as the unit lighting load for dwelling units.
Question 2: Per NEC 220.52(A), what is the minimum number of 20-ampere small appliance branch circuits required for a dwelling unit?
- 1
- 2 (Correct answer)
- 3
- 4
Correct answer: 2
NEC 220.52(A) requires at least two 20-ampere small appliance branch circuits for the kitchen, pantry, dining room, and similar areas.
Question 3: Per NEC 220.52(B), what is the standard load used for the laundry branch circuit in a dwelling unit load calculation?
- 750 VA
- 1,000 VA
- 1,500 VA (Correct answer)
- 2,000 VA
Correct answer: 1,500 VA
NEC 220.52(B) assigns a 1,500 VA load for the laundry branch circuit in dwelling unit calculations.
Question 4: What demand factor does NEC Table 220.42 assign to the first 3,000 VA of general lighting load in a dwelling unit?
- 25%
- 35%
- 75%
- 100% (Correct answer)
Correct answer: 100%
NEC Table 220.42 requires the first 3,000 VA of dwelling lighting load to be calculated at 100% demand with no reduction allowed.
Question 5: A dwelling unit has 1,500 square feet of living space. What is the calculated general lighting load before demand factors are applied?
- 1,500 VA
- 3,000 VA
- 4,500 VA (Correct answer)
- 6,000 VA
Correct answer: 4,500 VA
1,500 sq ft × 3 VA/sq ft = 4,500 VA per NEC Table 220.12.
Question 6: According to NEC Table 220.55, what is the demand load for a single household electric range with a 12 kW nameplate rating?
- 6 kW
- 8 kW (Correct answer)
- 10 kW
- 12 kW
Correct answer: 8 kW
NEC Table 220.55, Column C allows 8 kW demand for a single range rated over 8¾ kW through 12 kW.
Question 7: Which NEC article covers branch-circuit, feeder, and service load calculations?
- Article 210
- Article 215
- Article 220 (Correct answer)
- Article 230
Correct answer: Article 220
NEC Article 220 is dedicated entirely to branch-circuit, feeder, and service load calculations.
Journeyman Electrician’s Exam Journeyman Electrician's Load Calculations 1
According to NEC Table 220.12, what is the unit lighting load for a dwelling unit?