Code Check-In

Article 100 of the National Electrical Code (NEC) contains definitions that are used in more than two articles of the Code. Several revisions in the 2017 version of the NEC include both new and revised definitions. Check your Code proficiency using defined terms. All answers are based on the 2017 NEC.

1. The electrical equipment referred to in the NEC may be which of the following types?

Correct Answer: Any of the above

2. Making interpretations, deciding on approvals and granting special permission contemplated in many of the NEC rules are the responsibility of the _________.

Correct Answer: Authority having jurisdiction

3. Based on the NEC, a continuous load is one where the maximum current is expected to continue for _________.

Correct Answer: 3 hours or more

4. A duplex receptacle contains two contact devices.

Correct Answer: True

5. Based on the NEC, which of the following is not a structure?

Correct Answer: All of the above

6. Which NEC table is used for sizing a grounding electrode conductor?

Correct Answer: Table 250.66

7. What is the minimum width of working space required in front of a panelboard that measures 40 inches in width?

Correct Answer: 40 inches

8. On a 4-wire, delta-connected system, the conductor having the higher phase-to-ground voltage shall be identified by which color if the grounded conductor is not present?

Correct Answer: Any of the above

9. In a dwelling unit, all 125-volt (V), single-phase, 15- and 20-ampere receptacles installed within _________ feet of a sink shall have ground-fault circuit-interrupter protection for personnel.

Correct Answer: 6

10. The voltage to ground on an ungrounded 480V, three-phase, 3-wire system is _________V.

Correct Answer: 480