Illustrated Guide to the National Electrical Code
CHARLES MILLER
9th Edition
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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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Solutionand AnswerGuide
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 (Fault Current, 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:periodic duty
5. The is theconnection between the grounded-
circuit conductor and the equipment grounding conductor at the
service.
a. NEC®Reference: Article 100 (Bonding Jumper, Main)
b. Answer: mainbonding jumper