Illustrated Guide to the National Electrical Code (NEC), 9th Edition – Charles R. Miller – 2024 – Complete Chapter 1–19 Exam Answer Guide2026

Illustrated Guide to the National Electrical Code

(NEC), 9th Edition – Charles R. Miller – Complete

Chapter 1–19 Exam Answer Guide 2026

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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 productsafetystandards used
for product listing where that listing is required by the NEC.
a. NEC®Reference:InformativeAnnexA
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:personsand property
b. Answer:90.2(A)

6. The original Code document was developed in as aresult 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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SolutionandzxAnswerGuide
MILLER/SANDEFUR, 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,GeneralPurpose)
b. Answer:generalpurpose

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 (FaultzxCurrent, Available)
b. Answer: Available faultcurrent

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:periodiczxduty

5. The is theconnection between the grounded-circuit conductor
and the equipment grounding conductor at the service.
a. NEC®Reference: Article 100 (BondingzxJumper, Main)
b. Answer: mainbonding jumper