Solution and Answer Guide to the National Electrical Code 9th Edition by Charles R. Miller – Chapters 1–19 Full Manual with Verified Solutions (Illustrated Guide to the NEC®)

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SOLUTION AND ANSWER GUIDE TO THE NATIONAL
ELECTRICAL CODE 9TH EDITION BY CHARLES R. MILLER
CHAPTER 1-19 FULL MANUAL WITH VERIFIED SOLUTIONS
MILLER/SANDEFUR, ILLUSTRATED GUIDE TO THE NEC®, 21E, ©2024, 9780357766712; UNIT 1:

INTRODUCTION TO THE NATIONAL ELECTRICAL CODE®


TABLE OF CONTENTS

Unit 1 Competency Test ....................................................................................................................................1



UNIT1COMPETENCY TEST


1. The National Fire Protection Association has acted as sponsor of the
National Electrical Code since .
a. NEC® Reference: Page 1
b. Answer:1911

2. Informative Annex provides a list of product safety standards used for
product listing where that listing is required by the NEC.
a. NEC® Reference: Informative Annex A
b. Answer: A

3. Which chapters in the NEC apply generally to all installations?
a. NEC® Reference: 90.3
b. Answer: Chapters 1, 2, 3, and 4

4. Every three years, the National Electrical Code is revised, but the Code has only been on a
three- year revision cycle since .
a. NEC® Reference: Page 1
b. Answer:1975

5. The purpose of the National Electrical Code is the practical safeguarding of
from hazards arising from the use of electricity.
a. NEC® Reference: persons and property
b. Answer:90.2(A)

6. The original Code document was developed in as a result of the
united efforts of various insurance, electrical, architectural, and allied interests.
a. NEC® Reference: Page 1
b. Answer:1897

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7. Informative annexes are not part of the requirements of the NEC but are included for
only.
a. NEC® Reference: 90.3
b. Answer: informational purposes

8. What city was home to the first central-station electric generating plant
developed by Thomas A. Edison?
a. NEC® Reference: Page 2
b. Answer: New York City

9. Chapter consists of tables that are applicable as referenced.
a. NEC® Reference: 90.3
b. Answer:9

10. In the NEC, UL is the abbreviation for .
a. NEC® Reference: Annex I, footnote under Table I.3
b. Answer: Underwriters Laboratories

11. Equipment that is listed, labeled, or both, or identified for a use shall be installed and used
in accordance with any included in the listing, labeling, or
identification.
a. NEC® Reference: 110.3(B)
b. Answer: instructions

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Solution and Answer Guide
MILLER/SAND E FUR, ILLUSTRATED GUIDE TO THE NEC®, 21E, ©2024, 9780357766712; UNIT 2:
DEFINITIONS®


TABLE OF CONTENTS

Unit 2 Competency Test ....................................................................................................................................1



UNIT2COMPETENCY TEST

1. A(n) branch circuit supplies two or more receptacles or
outlets for lighting and appliances.
a. NEC® Reference: Article100 (Branch-Circuit, General Purpose)
b. Answer: general purpose

2. is the largest amount of current capable of being delivered at a point
on the electrical system during a short-circuit condition.
a. NEC® Reference: Article 100 (Fault Current, Available)
b. Answer: Available fault current

3. A(n) branch circuit consists of two or more ungrounded conductors
having a potential difference between them, and a grounded conductor having equal
potential difference between it and each ungrounded conductor of the circuit and that is
connected to the neutral or grounded conductor of the system.
a. NEC® Reference: multiwire
b. Answer: Article100 (Branch-Circuit, Multiwire)

4. An intermittent operation in which load conditions are regularly recurrent is the
definition of .
a. NEC®Reference:Article100(Duty, Periodic)
b. Answer: periodic duty

5. The is the connection between the grounded-circuit conductor and
the equipment grounding conductor at the service.
a. NEC® Reference: Article 100 (Bonding Jumper, Main)
b. Answer: main bonding jumper

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6. A(n) is used to connect the system grounded conductor or the
equipment to a grounding electrode or to a point on the grounding electrode system.
a. NEC®Reference:Article100 (Grounding Electrode Conductor)
b. Answer: grounding electrode conductor

7. Rainproof, raintight, or watertight equipment can fulfill the requirements for
where varying weather conditions other than wetness, such
as snow, ice, dust, or temperature extremes, are not a factor.
a. NEC® Reference: Article 100 (Weatherproof: Informational Note)
b. Answer: weatherproof

8. A(n) is an intentionally constructed, low-impedance electrically
conductive path designed and intended to carry current during ground-fault events from the
point of a ground fault on a wiring system to the electrical supply source and that facilitates the
operation of the overcurrent protective device or ground- fault detectors.
a. NEC® Reference: Article 100 (Ground Fault Current Path, Effective)
b. Answer: effective ground-fault current path

9. A(n) is a manual, nonautomatic, or automatic operated device used in
conjunction with a transfer switch to provide a means of directly connecting load conductors to a
power source and of disconnecting the transfer switch.
a. NEC® Reference: Article100 (Transfer Switch ,Bypass Isolation)
b. Answer: bypass isolation transfer switch

10. A surface, flush, or freestanding assemblage with a raceway, fittings, or other enclosure
provided with one or more receptacles, for the purpose of supplying power to utilization
equipment is called a(n).
a. NEC®Reference:Article100 (Multioutlet Assembly)
b. Answer: multioutlet assembly

11. A raceway encased in 4 in. (102 mm) of concrete on the ground floor (in direct contact with the
earth) shall be considered a(n) location.
a. NEC® Reference: Article 100 (Location, Wet)
b. Answer: wet

12. A(n) may consist of one or more sensing elements integral with
the motor-compressor and an external control device.
a. NEC®Reference:Article100(Thermal Protector: Informational Note)
b. Answer: thermal protector