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Journeyman Electrician Exam (NEC-based)

Load calculations: practice questions

Our Journeyman Electrician bank has 30 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.

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Question 1

When sizing motor branch circuit conductors, what multiplier is applied to the full-load current?

  1. 100%
  2. 125%
  3. 150%
  4. 250%
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B. 125% — Use the FLC from the NEC tables, not the nameplate.

Question 2

Using the standard method, what is the demand load for 12,000 VA of general lighting, small appliance and laundry loads?

  1. 4,200 VA
  2. 12,000 VA
  3. 6,150 VA
  4. 3,000 VA
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C. 6,150 VA — 3,000 + (9,000 × 35%) = 3,000 + 3,150.

Question 3

In the standard dwelling calculation, what demand factor applies to the first 3,000 VA of general lighting and small appliance load?

  1. 25%
  2. 35%
  3. 50%
  4. 100%
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D. 100% — The next 117,000 VA is at 35%.

Question 4

How many amperes does a 9,600-watt load draw at 240 volts?

  1. 80 amps
  2. 96 amps
  3. 24 amps
  4. 40 amps
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D. 40 amps — I = P ÷ E.

Question 5

What load is used for a household electric clothes dryer in a dwelling calculation?

  1. 3,000 watts
  2. 5,000 watts or the nameplate rating, whichever is larger
  3. 1,500 watts
  4. The nameplate only
Show the answer

B. 5,000 watts or the nameplate rating, whichever is larger — 220.54 (120.54 in the 2026 NEC).

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