Solution and Answer Guide: Miller/Sandefur, Illustrated Guide to the NEC®, ©2024, 9780357766712, Unit 1: Introduction to the National Electrical Code®
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
Solution and Answer Guide p6 p6 p6
MILLER/SANDEFUR, ILLUSTRATED GUIDE TO THE NEC®, 21E, ©2024, 9780357766712; UNIT 1: P6 P6 P 6 P6 P 6 P6 P6 P6 P 6 P6
INTRODUCTION TO THE NATIONAL ELECTRICAL CODE®
P6 P 6 P 6 P6 P6 P6
TABLE OF CONTENTS P6 P6
Unit 1 Competency Test ............................................................................................................................. 1
p6 p6 p6
UNIT 1 COMPETENCY TEST P6 P6 P6
1. The National Fire Protection Association has acted as sponsor of the National
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
Electrical Code since
p6 . p6 p6
a. NEC® Reference: Page 1 p6 p6 p6
b. Answer: 1911 p6
2. Informative Annex provides a list of product safety standards used
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
for product listing where that listing is required by the NEC.
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: Informative Annex A p6 p6 p6 p6
b. Answer: A p6
3. Which chapters in the NEC apply generally to all installations?
p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: 90.3 p6 p6
b. Answer: Chapters 1, 2, 3, and 4 p6 p6 p6 p6 p6 p6
4. Every three years, the National Electrical Code is revised, but the Code has only been
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
on a three-year revision cycle since
p6 p6 p6 . p6 p6 p6 p6
a. NEC® Reference: Page 1 p6 p6 p6
b. Answer: 1975 p6
5. The purpose of the National Electrical Code is the practical safeguarding of
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
from hazards arising from the use of electricity.
p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: persons and property p6 p6 p6 p6
b. Answer: 90.2(A) p6
6. The original Code document was developed
p6 in as a result of the
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
united efforts of various insurance, electrical, architectural, and allied interests.
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: Page 1 p6 p6 p6
b. Answer: 1897 p6
© 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
1
website, in whole or in part.
p6 p6 p6 p6 p6
,Solution and Answer Guide: Miller/Sandefur, Illustrated Guide to the NEC®, ©2024, 9780357766712, Unit 1: Introduction to the National Electrical Code®
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
7. Informative annexes are not part of the requirements of the NEC but are included for
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
only. p6
a. NEC® Reference: 90.3 p6 p6
b. Answer: informational purposes p6 p6
8. What city was home to the first central-station electric generating plant developed
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
by Thomas A. Edison?
p6 p6 p6 p6
a. NEC® Reference: Page 2 p6 p6 p6
b. Answer: New York City p6 p6 p6
9. Chapter consists of tables that are applicable as referenced.
p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: 90.3 p6 p6
b. Answer: 9 p6
10. In the NEC, UL is the abbreviation for
p6 p6 .
p6 p6 p6 p6 p6 p6
a. NEC® Reference: Annex I, footnote under Table I.3 p6 p6 p6 p6 p6 p6 p6
b. Answer: Underwriters Laboratories p6 p6
11. Equipment that is listed, labeled, or both, or identified for a use shall be installed
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
and used in accordance with any
p6 p6 p6 included in the listing, labeling, or
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
identification.
p6
a. NEC® Reference: 110.3(B) p6 p6
b. Answer: instructions p6
© 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
2
website, in whole or in part.
p6 p6 p6 p6 p6
, Solution and Answer Guide: Miller/Sandefur, Illustrated Guide to the NEC®, ©2024, 9780357766712, Unit 2: Definitions®
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
Solution and Answer Guide p6 p6 p6
MILLER/SANDEFUR, ILLUSTRATED GUIDE TO THE NEC®, 21E, ©2024, 9780357766712; P6 P6 P6 P6 P6 P6 P6 P6
UNIT 2: DEFINITIONS®
P 6 P6 P6
TABLE OF CONTENTS P6 P6
Unit 2 Competency Test ............................................................................................................................. 1
p6 p6 p6
UNIT 2 COMPETENCY TEST P6 P6 P6
1. A(n) branch circuit supplies two or more receptacles or outlets
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
for lighting and appliances.
p6 p6 p6 p6
a. NEC® Reference: Article 100 (Branch-Circuit, General Purpose) p6 p6 p6 p6 p6 p6
b. Answer: general purpose p6 p6
2. is the largest amount of current capable of being delivered at p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
p6 a point on the electrical system during a short-circuit condition.
p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: Article 100 (Fault Current, Available) p6 p6 p6 p6 p6 p6
b. Answer: Available fault current p6 p6 p6
3. A(n) branch circuit consists of two or more ungrounded
p6 p6 p6 p6 p6 p6 p6 p6 p6
conductors having a potential difference between them, and a grounded conductor
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
having equal potential difference between it and each ungrounded conductor of the
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
circuit and that is connected to the neutral or grounded conductor of the system.
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: multiwire p6 p6
b. Answer: Article 100 (Branch-Circuit, Multiwire) p6 p6 p6 p6
4. An intermittent operation in which load conditions are regularly recurrent is the
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
definition of
p6 . p6 p6
a. NEC® Reference: Article 100 (Duty, Periodic) p6 p6 p6 p6 p6
b. Answer: periodic duty p6 p6
5. The is the connection between the grounded-circuit conductor
p6 p6 p6 p6 p6 p6 p6 p6
and the equipment grounding conductor at the service.
p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: Article 100 (Bonding Jumper, Main) p6 p6 p6 p6 p6 p6
b. Answer: main bonding jumper p6 p6 p6
© 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
1
website, in whole or in part.
p6 p6 p6 p6 p6
, Solution and Answer Guide: Miller/Sandefur, Illustrated Guide to the NEC®, ©2024, 9780357766712, Unit 2: Definitions®
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
6. A(n) p6 is used to connect the system grounded conductor or p 6 p6 p6 p6 p6 p6 p6 p6 p6
the equipment to a grounding electrode or to a point on the grounding electrode
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
system.
p6
a. NEC® Reference: Article 100 (Grounding Electrode Conductor)
p6 p6 p6 p6 p6 p6
b. Answer: grounding electrode conductor p6 p6 p6
7. Rainproof, raintight, or watertight equipment can fulfill the requirements for
p6 p6 p6 p6 p6 p6 p6 p6 p6
where varying weather conditions other than wetness, such p 6 p6 p6 p6 p6 p6 p6 p6
as snow, ice, dust, or temperature extremes, are not a factor.
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: Article 100 (Weatherproof: Informational Note)
p6 p6 p6 p6 p6 p6
b. Answer: weatherproof p6
8. A(n) p6 is an intentionally constructed, low-impedance electrically p 6 p6 p6 p6 p6 p6
conductive path designed and intended to carry current during ground-fault events
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
from the point of a ground fault on a wiring system to the electrical supply source
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
and that facilitates the operation of the overcurrent protective device or ground-fault
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
detectors.
p6
a. NEC® Reference: Article 100 (Ground Fault Current Path, Effective)
p6 p6 p6 p6 p6 p6 p6 p6
b. Answer: effective ground-fault current path p6 p6 p6 p6
9. A(n) p6 is a manual, nonautomatic, or automatic operated device p 6 p6 p6 p6 p6 p6 p6 p6
used in conjunction with a transfer switch to provide a means of directly connecting
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
load conductors to a power source and of disconnecting the transfer switch.
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: Article 100 (Transfer Switch, Bypass Isolation)
p6 p6 p6 p6 p6 p6 p6
b. Answer: bypass isolation transfer switch p6 p6 p6 p6
10. A surface, flush, or freestanding assemblage with a raceway, fittings, or other
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
enclosure provided with one or more receptacles, for the purpose of supplying power
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
to utilization equipment is called a(n).
p6 p6 p6 p6 p6 p6
a. NEC® Reference: Article 100 (Multioutlet Assembly)
p6 p6 p6 p6 p6
b. Answer: multioutlet assembly p6 p6
11. A raceway encased in 4 in. (102 mm) of concrete on the ground floor (in direct contact
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
with the earth) shall be considered a(n)
p6 p6 p6 location. p6 p6 p6 p6 p6 p 6
a. NEC® Reference: Article 100 (Location, Wet)
p6 p6 p6 p6 p6
b. Answer: wet p6
12. A(n) p6 may consist of one or more sensing elements integral with p 6 p6 p6 p6 p6 p6 p6 p6 p6 p6
the motor-compressor and an external control device.
p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: Article 100 (Thermal Protector: Informational Note)
p6 p6 p6 p6 p6 p6 p6
b. Answer: thermal protector p6 p6
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
Solution and Answer Guide p6 p6 p6
MILLER/SANDEFUR, ILLUSTRATED GUIDE TO THE NEC®, 21E, ©2024, 9780357766712; UNIT 1: P6 P6 P 6 P6 P 6 P6 P6 P6 P 6 P6
INTRODUCTION TO THE NATIONAL ELECTRICAL CODE®
P6 P 6 P 6 P6 P6 P6
TABLE OF CONTENTS P6 P6
Unit 1 Competency Test ............................................................................................................................. 1
p6 p6 p6
UNIT 1 COMPETENCY TEST P6 P6 P6
1. The National Fire Protection Association has acted as sponsor of the National
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
Electrical Code since
p6 . p6 p6
a. NEC® Reference: Page 1 p6 p6 p6
b. Answer: 1911 p6
2. Informative Annex provides a list of product safety standards used
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
for product listing where that listing is required by the NEC.
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: Informative Annex A p6 p6 p6 p6
b. Answer: A p6
3. Which chapters in the NEC apply generally to all installations?
p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: 90.3 p6 p6
b. Answer: Chapters 1, 2, 3, and 4 p6 p6 p6 p6 p6 p6
4. Every three years, the National Electrical Code is revised, but the Code has only been
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
on a three-year revision cycle since
p6 p6 p6 . p6 p6 p6 p6
a. NEC® Reference: Page 1 p6 p6 p6
b. Answer: 1975 p6
5. The purpose of the National Electrical Code is the practical safeguarding of
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
from hazards arising from the use of electricity.
p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: persons and property p6 p6 p6 p6
b. Answer: 90.2(A) p6
6. The original Code document was developed
p6 in as a result of the
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
united efforts of various insurance, electrical, architectural, and allied interests.
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: Page 1 p6 p6 p6
b. Answer: 1897 p6
© 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
1
website, in whole or in part.
p6 p6 p6 p6 p6
,Solution and Answer Guide: Miller/Sandefur, Illustrated Guide to the NEC®, ©2024, 9780357766712, Unit 1: Introduction to the National Electrical Code®
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
7. Informative annexes are not part of the requirements of the NEC but are included for
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
only. p6
a. NEC® Reference: 90.3 p6 p6
b. Answer: informational purposes p6 p6
8. What city was home to the first central-station electric generating plant developed
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
by Thomas A. Edison?
p6 p6 p6 p6
a. NEC® Reference: Page 2 p6 p6 p6
b. Answer: New York City p6 p6 p6
9. Chapter consists of tables that are applicable as referenced.
p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: 90.3 p6 p6
b. Answer: 9 p6
10. In the NEC, UL is the abbreviation for
p6 p6 .
p6 p6 p6 p6 p6 p6
a. NEC® Reference: Annex I, footnote under Table I.3 p6 p6 p6 p6 p6 p6 p6
b. Answer: Underwriters Laboratories p6 p6
11. Equipment that is listed, labeled, or both, or identified for a use shall be installed
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
and used in accordance with any
p6 p6 p6 included in the listing, labeling, or
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
identification.
p6
a. NEC® Reference: 110.3(B) p6 p6
b. Answer: instructions p6
© 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
2
website, in whole or in part.
p6 p6 p6 p6 p6
, Solution and Answer Guide: Miller/Sandefur, Illustrated Guide to the NEC®, ©2024, 9780357766712, Unit 2: Definitions®
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
Solution and Answer Guide p6 p6 p6
MILLER/SANDEFUR, ILLUSTRATED GUIDE TO THE NEC®, 21E, ©2024, 9780357766712; P6 P6 P6 P6 P6 P6 P6 P6
UNIT 2: DEFINITIONS®
P 6 P6 P6
TABLE OF CONTENTS P6 P6
Unit 2 Competency Test ............................................................................................................................. 1
p6 p6 p6
UNIT 2 COMPETENCY TEST P6 P6 P6
1. A(n) branch circuit supplies two or more receptacles or outlets
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
for lighting and appliances.
p6 p6 p6 p6
a. NEC® Reference: Article 100 (Branch-Circuit, General Purpose) p6 p6 p6 p6 p6 p6
b. Answer: general purpose p6 p6
2. is the largest amount of current capable of being delivered at p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
p6 a point on the electrical system during a short-circuit condition.
p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: Article 100 (Fault Current, Available) p6 p6 p6 p6 p6 p6
b. Answer: Available fault current p6 p6 p6
3. A(n) branch circuit consists of two or more ungrounded
p6 p6 p6 p6 p6 p6 p6 p6 p6
conductors having a potential difference between them, and a grounded conductor
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
having equal potential difference between it and each ungrounded conductor of the
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
circuit and that is connected to the neutral or grounded conductor of the system.
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: multiwire p6 p6
b. Answer: Article 100 (Branch-Circuit, Multiwire) p6 p6 p6 p6
4. An intermittent operation in which load conditions are regularly recurrent is the
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
definition of
p6 . p6 p6
a. NEC® Reference: Article 100 (Duty, Periodic) p6 p6 p6 p6 p6
b. Answer: periodic duty p6 p6
5. The is the connection between the grounded-circuit conductor
p6 p6 p6 p6 p6 p6 p6 p6
and the equipment grounding conductor at the service.
p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: Article 100 (Bonding Jumper, Main) p6 p6 p6 p6 p6 p6
b. Answer: main bonding jumper p6 p6 p6
© 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
1
website, in whole or in part.
p6 p6 p6 p6 p6
, Solution and Answer Guide: Miller/Sandefur, Illustrated Guide to the NEC®, ©2024, 9780357766712, Unit 2: Definitions®
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
6. A(n) p6 is used to connect the system grounded conductor or p 6 p6 p6 p6 p6 p6 p6 p6 p6
the equipment to a grounding electrode or to a point on the grounding electrode
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
system.
p6
a. NEC® Reference: Article 100 (Grounding Electrode Conductor)
p6 p6 p6 p6 p6 p6
b. Answer: grounding electrode conductor p6 p6 p6
7. Rainproof, raintight, or watertight equipment can fulfill the requirements for
p6 p6 p6 p6 p6 p6 p6 p6 p6
where varying weather conditions other than wetness, such p 6 p6 p6 p6 p6 p6 p6 p6
as snow, ice, dust, or temperature extremes, are not a factor.
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: Article 100 (Weatherproof: Informational Note)
p6 p6 p6 p6 p6 p6
b. Answer: weatherproof p6
8. A(n) p6 is an intentionally constructed, low-impedance electrically p 6 p6 p6 p6 p6 p6
conductive path designed and intended to carry current during ground-fault events
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
from the point of a ground fault on a wiring system to the electrical supply source
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
and that facilitates the operation of the overcurrent protective device or ground-fault
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
detectors.
p6
a. NEC® Reference: Article 100 (Ground Fault Current Path, Effective)
p6 p6 p6 p6 p6 p6 p6 p6
b. Answer: effective ground-fault current path p6 p6 p6 p6
9. A(n) p6 is a manual, nonautomatic, or automatic operated device p 6 p6 p6 p6 p6 p6 p6 p6
used in conjunction with a transfer switch to provide a means of directly connecting
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
load conductors to a power source and of disconnecting the transfer switch.
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: Article 100 (Transfer Switch, Bypass Isolation)
p6 p6 p6 p6 p6 p6 p6
b. Answer: bypass isolation transfer switch p6 p6 p6 p6
10. A surface, flush, or freestanding assemblage with a raceway, fittings, or other
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
enclosure provided with one or more receptacles, for the purpose of supplying power
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
to utilization equipment is called a(n).
p6 p6 p6 p6 p6 p6
a. NEC® Reference: Article 100 (Multioutlet Assembly)
p6 p6 p6 p6 p6
b. Answer: multioutlet assembly p6 p6
11. A raceway encased in 4 in. (102 mm) of concrete on the ground floor (in direct contact
p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6 p6
with the earth) shall be considered a(n)
p6 p6 p6 location. p6 p6 p6 p6 p6 p 6
a. NEC® Reference: Article 100 (Location, Wet)
p6 p6 p6 p6 p6
b. Answer: wet p6
12. A(n) p6 may consist of one or more sensing elements integral with p 6 p6 p6 p6 p6 p6 p6 p6 p6 p6
the motor-compressor and an external control device.
p6 p6 p6 p6 p6 p6 p6
a. NEC® Reference: Article 100 (Thermal Protector: Informational Note)
p6 p6 p6 p6 p6 p6 p6
b. Answer: thermal protector p6 p6
