All questions and answers are based on the 2026 NEC.

Q1: At carnivals, fairs, and circuses, equipment that is _____ to the general public and supplied from a 125V, single-phase, 15A or 20A branch circuit shall be GFCI protected.

a) accessible

b) concealed

c) exposed

d) readily accessible

Q2: Ground detectors for ungrounded systems must be installed as _____ where the system receives its supply.

a) close as possible to

b) close as practicable to

c) far as possible from

d) far as practicable from

Q3: In noncombustible walls or ceilings, how far is the front edge of an outlet box or fitting permitted to be set back from the finished surface?

a) ¼ in.

b) 1/8 in.

c) 1/16 in.

d) None of the above

Q4: In addition to the provisions of Art. 338, Type SE service-entrance cable used for interior wiring shall comply with most of the installation requirements of Part II of Art. _____. 

a) 320

b) 330

c) 334

d) 336

Q5: A snap switch shall not be grouped or ganged in enclosures with other snap switches unless they are arranged so that the voltage between adjacent devices does not exceed _____V.

a) 200

b) 300

c) 400

d) 600

Q6: For floating piers that rise and fall based on water level, the electrical datum plane is 30 in. above the water level at the floating pier and at least _____ in. above the deck.

a) 6

b) 12

c) 18

d) 24

Answers:

Q1: d) readily accessible

According to Sec. 525.24(A)(2), "Equipment that is readily accessible to the general public and supplied from a 125V, single-phase, 15A or 20A branch circuit" shall be GFCI protected.

Q2: b) close as practicable to

According to Sec. 250.21(B)(2), "The ground detection sensing equipment shall be connected as close as practicable to where the system receives its supply."

Q3: a) ¼

Per Section 314.20(A): In noncombustible walls or ceilings, the front edge of an outlet box or fitting will not be set back from the finished surfaces more than ¼ in.

Q4: c) 334

Section 338.10(B)(4)(a)(1) states, "In addition to the provisions of this article, Type SE service-entrance cable used for interior wiring shall comply with the installation requirements of Art. 334 Part II, excluding Sec. 334.80."

Q5: b) 300

Per Sec. 406.38(B): "Snap switches shall not be grouped or ganged in enclosures with other snap switches, receptacles, or similar devices unless they are arranged so that the voltage between adjacent devices does not exceed 300V."

Q6: b) 12

Section 555.16(A) specifies that the electrical datum plane is "30 in. above the water level at the floating pier or boat landing stage and a minimum of 12 in. above the level of the deck."