Journeyman Electrician’s Exam Journeyman Electrician's Load Calculations 3

Question 1

A 2,000 sq ft dwelling has two small appliance circuits and one laundry circuit. What is the total general load before demand factors?

Accepted Answer

10,500 VA

Answer

2,000 sq ft × 3 VA = 6,000 VA lighting, plus 2 × 1,500 VA = 3,000 VA small appliance, plus 1,500 VA laundry = 10,500 VA.

Question 2

Using the NEC 220.82 optional calculation method for dwelling units, what percentage applies to all general loads above 10 kVA?

Accepted Answer

40%

Answer

NEC 220.82(B) applies 100% to the first 10 kVA of general loads and 40% to all remaining general loads above that.

Question 3

Per NEC Table 220.42, what demand factor applies to dwelling unit lighting loads that exceed 120,000 VA?

Accepted Answer

25%

Answer

NEC Table 220.42 applies a 25% demand factor to the portion of dwelling unit lighting loads exceeding 120,000 VA.

Question 4

A commercial space has 50 duplex receptacle outlets. Per NEC 220.14(I), what is the total calculated receptacle load?

Accepted Answer

9,000 VA

Answer

Per NEC 220.14(I), each duplex receptacle counts as one outlet at 180 VA, so 50 × 180 VA = 9,000 VA.

Question 5

Per NEC 220.54, what is the minimum demand load that must be used for a household electric clothes dryer when the nameplate rating is less than 5,000 watts?

Accepted Answer

5,000 W

Answer

NEC 220.54 states the demand load for electric clothes dryers shall be 5,000 W or the nameplate rating, whichever is larger.

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Journeyman Electrician's Load Calculations 3