Surging Ahead

Test your knowledge of the National Electrical Code (NEC).

1. A point-of-utilization surge protective device (SPD) best describes which type of SPD?

Correct Answer: Type 3

2. Surge arresters are required to be listed by a qualified electrical testing laboratory.

Correct Answer: False

3. The authority having jurisdiction has which of the following responsibilities?

Correct Answer: All of the above

4. What is the minimum length required for a driven ground rod at a temporary construction service?

Correct Answer: 8 feet

5. Meter sockets supplied by and under the exclusive control of an electric utility are not required to be listed.

Correct Answer: True

6. Service disconnecting means are generally limited to not more than six switches or sets of circuit breakers, or combination of not more than six switches and sets of circuit breakers in separate enclosures, in a single enclosure, and must be grouped in one location. By exception, an additional disconnect or circuit breaker is permitted for an SPD.

Correct Answer: False

7. What is the voltage to ground for an ungrounded, three-phase, 3-wire, 480-volt (V) system?

Correct Answer: 480V

8. A load where the wave shape of the steady-state current does not follow the wave shape of the applied voltage best describes a/n _________ load.

Correct Answer: Nonlinear

9. A listed SPD shall be installed on which of the following?

Correct Answer: All of the above

10. Which of the following wiring methods is permitted in a Class I, Zone 0 location?

Correct Answer: Intrinsically safe circuits (ia) and encapsulation (ma)