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TL;DR

Study NEC Article 300 covering general wiring requirements including conductor installation, protection, and routing. Article 300 establishes fundamental rules that apply across all wiring methods and is heavily tested.

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

Free General Wiring (Art. 300) Practice Questions

Journeyman Electrician License Exam · Wiring Methods & Materials

This module covers General Wiring (Art. 300) as part of the Wiring Methods & Materials section, testing your understanding of core concepts and their practical application.

ExamJourneyman Electrician License Exam
Pass Rate55%
Duration240 minutes
ModuleGeneral Wiring (Art. 300)

Why General Wiring (Art. 300) matters

General Wiring (Art. 300) 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. Per NEC Table 300.5, what is the minimum cover for a residential branch circuit rated 120V or less with GFCI protection and maximum overcurrent protection of 20 amperes, when buried directly without a raceway (not under a driveway)?

  • 12 inches
  • 24 inches
  • 18 inches
  • 6 inches

2. Per NEC 300.4(E), where a cable- or raceway-type wiring method is installed parallel to framing members and the wiring is less than 1-1/4 inches from the nearest edge, what protection is required?

  • A 1/16-inch steel plate or sleeve of adequate length
  • A 1/8-inch steel plate
  • Wrapping the cable with electrical tape
  • Moving the cable to a different stud bay

3. According to NEC 300.6(A), ferrous metal raceways and fittings protected from corrosion solely by enamel are permitted only in which environment?

  • Indoor dry locations only
  • Any indoor location
  • Outdoor locations with additional paint
  • Damp locations with supplementary coating

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4. Per NEC 300.5, direct-buried conductors or cables emerging from the ground must be protected by enclosures or raceways from the minimum cover depth required to a point at least how far above finished grade?

  • 8 feet
  • 6 feet
  • 10 feet
  • 4 feet

5. According to NEC 300.4(B)(1), a steel plate used to protect cables from nails and screws where they pass through metal studs must be at least what thickness?

  • 1/16 inch
  • 1/8 inch
  • 1/32 inch
  • 3/32 inch

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Frequently Asked Questions

How many General Wiring (Art. 300) questions are on the Journeyman Electrician License Exam?▼
The Wiring Methods & Materials section, which includes General Wiring (Art. 300), 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 General Wiring (Art. 300)?▼
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 General Wiring (Art. 300) 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.