All questions and answers are based on the 2026 NEC.

Q1: Fill in the blank. Each meeting room of not more than _____ sq ft in other than dwelling units shall have outlets for nonlocking-type, 125V, 15A or 20A receptacles.

a) 100

b) 500

c) 1,000

d) 2,000

Q2: Fill in the blank. The NEC does not regulate installations _____.

a) in ships

b) underground in mines

c) of service drops under the exclusive control of an electric utility

d) all of these

Q3: Fill in the blank. In _____ branch circuits, the continuity of a grounded conductor shall not depend on device connections such as lampholders, receptacles, and so forth where the removal of such devices would interrupt the continuity.

a) all

b) grounded

c) individual

d) multiwire

Q4: Fill in the blank. In patient care spaces, the grounding terminals of all receptacles, other than _____ receptacles, shall be connected to a green, insulated, copper equipment grounding conductor.

a) critical care

b) general care

c) isolated ground

d) ungrounded system

Q5: Fill in the blank. For multiconductor cables installed in cable trays, ampacity adjustment factors apply to the number of current-carrying conductors in the _____.

a) cable

b) cable tray

c) both of these

d) neither of these

Q6: Fill in the blank. Direct buried underground service conductors that are not encased in concrete and that are buried 18 in. or more below grade shall have their location identified by a warning ribbon that is placed in the trench at least _____ above the underground installation.

a) 12 in.

b) 10 in.

c) 8 in.

d) 6 in.

Answers:

Q1: c) 1,000

Section 210.65(A) states, "Each meeting room of not more than 1,000 sq ft in other than dwelling units shall have outlets for nonlocking-type, 125V, 15A or 20A receptacles."

Q2: d) all of these

According to Sec. 90.2(A)(2), the NEC does not regulate any of those installations.

Q3: d) multiwire

Per Sec. 300.15(B): "In multiwire branch circuits, the continuity of a grounded conductor shall not depend on device connections such as lampholders, receptacles, and so forth where the removal of such devices would interrupt the continuity."

Q4: c) isolated ground

Section 517.13(B)(1)(1) confirms that in patient care spaces, "Grounding terminals of all receptacles other than isolated ground receptacles" shall be connected to a green, insulated, copper equipment grounding conductor.

Q5: a) cable

According to Sec. 392.80(A)(1)(a), "Adjustment factors shall be limited to the number of current-carrying conductors in the cable and not to the number of conductors in the cable tray."

Q6: a) 12 in.

Per Sec. 300.7(D)(3): "Direct buried service conductors and raceways containing service conductors that are not encased in concrete and that are buried 18 in. or more below grade shall have their location identified by a warning ribbon that is placed in the trench at least 12 in. above the underground installation."