Electrician Prep
All Guides

Practice Questions: Branch Circuit

Real questions from our bank, all referenced to NEC 2026. Tap “Show explanation” after you answer.

NEC NEC 210.8(A)Question 1

Per NEC 210.8(A), GFCI protection is required for all 125-volt through 250-volt receptacles in dwelling unit bathrooms that are rated how?

  • A20 amperes or less
  • B30 amperes or less
  • C50 amperes or less
  • D150 volts or less to ground
Show explanation

NEC 210.8(A) requires GFCI protection for receptacles rated 150V or less to ground in bathrooms, regardless of amperage.

NEC NEC 210.52(A)(1)Question 2

In dwelling units, receptacle outlets in habitable rooms shall be installed so that no point measured horizontally along the floor line of any wall space is more than how far from a receptacle outlet?

  • A4 feet
  • B5 feet
  • C6 feet
  • D8 feet
Show explanation

Per NEC 210.52(A)(1), receptacle outlets in habitable rooms must be positioned so no point is more than 6 feet from an outlet.

NEC NEC 210.12(B)Question 3

According to NEC 210.12(B), AFCI protection is required in dwelling unit kitchens, family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sunrooms, recreation rooms, closets, hallways, laundry areas, and similar areas on what type of branch circuits?

  • AAll 120-volt, single-phase, 15- and 20-ampere branch circuits
  • BOnly 15-ampere branch circuits
  • CAll 120-volt and 240-volt circuits
  • DAll 120-volt, single-phase, 10-, 15-, and 20-ampere branch circuits
Show explanation

NEC 210.12(B) requires AFCI protection for all 120-volt, single-phase, 10-, 15-, and 20-ampere branch circuits in specified dwelling unit areas.

NEC NEC 210.52(C)(1)Question 4

Per NEC 210.52(C)(1), receptacle outlets for countertop and work surfaces in kitchens shall be installed so that no point along the wall line is more than how far from a receptacle outlet?

  • A12 inches
  • B18 inches
  • C24 inches
  • D48 inches
Show explanation

NEC 210.52(C)(1) requires kitchen countertop receptacles to be spaced no more than 24 inches apart along the wall line.

NEC NEC 210.18Question 5

What is the maximum rating for an individual branch circuit per NEC 210.18?

  • A30 amperes
  • B40 amperes
  • C50 amperes
  • DThere is no maximum specified
Show explanation

Per NEC 210.18, the maximum rating for an individual branch circuit is 50 amperes.

Practice all 104 branch circuit questions

7-day free trial. Full explanations, timed exams, progress tracking.

Start Free Trial→