Code Quiz: Article 100, Part 2

Based on the 2005 NEC

Questions and answers written by Mark Lamendola, who has worked as a master electrician, electrical inspector, and design engineer. Mark is an IEEE Senior Member, and the Code article author for Codebookcity.com. He is a former editor of an electrical magazine were he edited Code articles.

1.     The NEC has a name for a circuit breaker that you can set up to trip at various values of current, time, or both, within a predetermined range. What is it?

2.     The NEC has a name for a circuit breaker where the only delay is the one inherent in the mechanism--there is no deliberate delay. What is it?

3.     The NEC has a name for a circuit breaker that has a purposely introduced delay that decreases as the magnitude of the current increases. What is it?

4.     If you can make make wires (that are in a raceway) accessible by withdrawing them from the raceway, does the NEC consider them "concealed wires?"

5.    Is there a difference between an insulated conductor and a covered conductor? If not, why not? If so, what is it?

6.    The NEC uses the phrase "conduit body." Is it referring to the ends, the connectors, or the middle length of a conduit?

7.     Is a wirenut a device used to join wires via crimp pressure, rather than solder?

8.     Is a continuous load one that runs constantly?

9.     If something  has no live parts exposed to a person on the operating side of the equipment, what do we call it?

10.  What number do you get if you divide the maximum demand of a system by the total load of the system?