All questions and answers are based on the 2026 NEC.

Q1: Ground-fault circuit-interrupter (GFCI) protection for personnel shall be provided for electric space heating cables installed in electrically heated floors of _____.

a) basements

b) bedrooms

c) dining rooms

d) kitchens

Q2: In general, a non–grounding-type receptacle shall be permitted to be replaced with a(n) _____ type of receptacle.

a) AFCI

b) GFCI

c) locking

d) nonlocking

Q3: Where separate _____ conductors and supply-side bonding jumpers are installed, a terminal bar for all grounding and bonding conductor connections shall be secured inside the transformer enclosure.

a) branch circuit

b) equipment grounding

c) grounding electrode

d) ungrounded

Q4: A neutral conductor that carries only the _____ current from other conductors of the same circuit shall not be required to be counted as a current-carrying conductor when applying the provisions of Sec. 310.15(C)(1).

a) line

b) objectionable

c) phase

d) unbalanced

Q5: Where rigid metal conduit (RMC) enters an enclosure, a bushing shall be provided to protect the wires from _____ unless the box, fitting, or enclosure is designed to provide such protection.

a) abrasion

b) arcing

c) faulting

d) grounding

Q6: Luminaires with open or partially enclosed lamps, pendant luminaires, and _____ shall not be permitted in clothes closets.

a) electric-discharge luminaires

b) lampholders

c) LED luminaires

d) recessed luminaires

Answers:

Q1: d) kitchens

Section 424.44(E) confirms, "GFCI protection shall be provided for cables installed in electrically heated floors of bathrooms and kitchens and hydromassage bathtub locations."

Q2: b) GFCI

According to Sec. 406.12(D)(2)(b), "Non–grounding-type receptacles shall be permitted to be replaced with ground-fault circuit-interrupter-type receptacles."

Q3: b) equipment grounding

Per Sec. 450.12(A)(1): "Where separate equipment grounding conductors and supply-side bonding jumpers are installed, a terminal bar for all grounding and bonding conductor connections shall be secured inside the transformer enclosure."

Q4: d) unbalanced

As stated in Sec. 310.15(E)(2), "A neutral conductor that carries only the unbalanced current from the other conductors of the same circuit shall not be considered current-carrying."

Q5: a) abrasion

Section 344.46 states, "Where a conduit enters a box, fitting, or other enclosure, a bushing shall be provided to protect the wires from abrasion unless the box, fitting, or enclosure is designed to provide such protection."

Q6: b) lampholders

Section 410.16(C) confirms, "Luminaires with open or partially enclosed lamps, pendant luminaires or lampholders shall not be installed."