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TL;DR

Learn residential electrical installation requirements including dwelling unit load calculations. Residential wiring is a core competency for electricians and heavily tested.

By Valenke Exam Prep Team·Last updated 2026-06-03

Free Dwelling Unit Calcs (Standard Method) Practice Questions

Journeyman Electrician License Exam · Load Calculations

This module covers Dwelling Unit Calcs (Standard Method) as part of the Load Calculations section, testing your understanding of core concepts and their practical application.

ExamJourneyman Electrician License Exam
Pass Rate55%
Duration240 minutes
ModuleDwelling Unit Calcs (Standard Method)

Why Dwelling Unit Calcs (Standard Method) matters

Dwelling Unit Calcs (Standard Method) is a commonly tested topic on the Journeyman Electrician License Exam because it covers fundamental knowledge required for competent professional practice.

Sample Practice Questions (5)

1. A 2,500 sq ft dwelling has two small-appliance circuits, one laundry circuit, a 4,500 VA water heater, and a 4,000 VA dishwasher. Per NEC 220.53, when four or more fixed appliances (other than ranges, dryers, A/C, or space heating) are connected, what demand factor may be applied?

  • 100%
  • 75%
  • 65%
  • 50%

2. A dwelling unit has a total computed load (after all demand factors) of 24,000 VA on a 240-volt, single-phase service. What is the minimum service size in amperes?

  • 100 amps
  • 125 amps
  • 150 amps
  • 200 amps

3. A 2,200 sq ft dwelling has: two small-appliance circuits, one laundry circuit, a 12 kW range, a 5,000 VA dryer, a 4,500 VA water heater, a 6,000 VA A/C unit, and a 10 kW electric heat (5 strips at 2 kW each). Using the standard method, what is the total service load? (Range per Table 220.55 Column C for one unit = 8 kW.)

  • 26,895 VA
  • 32,700 VA
  • 23,415 VA
  • 29,415 VA

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4. A 2,750 sq ft dwelling has two small-appliance circuits, one laundry circuit, and a 240V/30A dedicated dryer circuit. Using the standard method, what is the demand load for the general lighting, small appliance, and laundry combined (per Table 220.42)?

  • 5,250 VA
  • 6,525 VA
  • 13,500 VA
  • 4,725 VA

5. Per NEC 220.14(J), a dwelling unit has a dedicated 20-amp, 240-volt outlet for a window air conditioner rated at 1,800 VA. How is this load included in the standard method service calculation?

  • At 1,800 VA added to the general lighting load before demand factors
  • At the nameplate rating of 1,800 VA added as a separate load at 100%
  • At 125% of 1,800 VA = 2,250 VA per the continuous load rule
  • At 80% of 1,800 VA = 1,440 VA per the motor load reduction

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Frequently Asked Questions

How many Dwelling Unit Calcs (Standard Method) questions are on the Journeyman Electrician License Exam?▼
The Load Calculations section, which includes Dwelling Unit Calcs (Standard Method), typically represents a significant portion of the exam. Focus on understanding core concepts rather than memorizing exact question counts, as the exam uses adaptive testing.
What is the best way to study Dwelling Unit Calcs (Standard Method)?▼
Use active recall and spaced repetition rather than passive reading. Practice with realistic exam questions, review explanations for both correct and incorrect answers, and focus on understanding the reasoning behind each concept.
What topics within Dwelling Unit Calcs (Standard Method) should I focus on most?▼
Focus on the concepts that appear in our practice questions and any areas where you consistently score below 70%. The adaptive practice mode will automatically target your weak areas for efficient study.