Solution hand hAnswer hGuide: hMiller/Sandefur, hIllustrated hGuide hto hthe hNEC®, h©2024, h9780357766712, hUnit h1: hIntroduction hto hthe hNational hElectrical hCode®
Solution and Answer Guide h h h
MILLER/SANDEFUR, ILLUSTRATED GUIDE TO THE NEC®, 21E, ©2024, 9780357766712; UNIT 1:
H H H H H H H H H H
INTRODUCTION TO THE NATIONAL ELECTRICAL CODE®
H H H H H H
TABLE OF CONTENTS H H
Unit 1 Competency Test.............................................................................................................................. 1
h h h
UNIT 1 COMPETENCY TEST
H H H
1. The National Fire Protection Association has acted as sponsor of the National Electrical
h h h h h h h h h h h h
Code since
h h .
a. NEC® Reference: Page 1 h h h
b. Answer: 1911 h
2. Informative Annex provides a list of product safety standards used for
h h h h h h h h h h h
product listing where that listing is required by the NEC.
h h h h h h h h h h
a. NEC® Reference: Informative Annex A h h h h
b. Answer: A h
3. Which chapters in the NEC apply generally to all installations?
h h h h h h h h h
a. NEC® Reference: 90.3 h h
b. Answer: Chapters 1, 2, 3, and 4 h h h h h h
4. Every three years, the National Electrical Code is revised, but the Code has only been on a
h h h h h h h h h h h h h h h h
three-year revision cycle since
h h . h h h
a. NEC® Reference: Page 1 h h h
b. Answer: 1975 h
5. The purpose of the National Electrical Code is the practical safeguarding of
h h h h h h h h h h h h
from hazards arising from the use of electricity.
h h h h h h h h
a. NEC® Reference: persons and property h h h h
b. Answer: 90.2(A) h
6. The original Code document was developed
h h in as a result of the united
h h h h h h h h h h h
efforts of various insurance, electrical, architectural, and allied interests.
h h h h h h h h h
a. NEC® Reference: Page 1 h h h
b. Answer: 1897 h
© h2024 hCengage. hAll hRights hReserved. hMay hnot hbe hscanned, hcopied hor hduplicated, hor hposted hto ha hpublicly haccessible 1
website, hin hwhole hor hin hpart.
,Solution hand hAnswer hGuide: hMiller/Sandefur, hIllustrated hGuide hto hthe hNEC®, h©2024, h9780357766712, hUnit h1: hIntroduction hto hthe hNational hElectrical hCode®
7. Informative annexes are not part of the requirements of the NEC but are included for
h h h h h h h h h h h h h h
only. h
a. NEC® Reference: 90.3 h h
b. Answer: informational purposes h h
8. What city was home to the first central-station electric generating plant developed by
h h h h h h h h h h h h
Thomas A. Edison?
h h h
a. NEC® Reference: Page 2 h h h
b. Answer: New York City h h h
9. Chapter h consists of tables that are applicable as referenced. h h h h h h h h
a. NEC® Reference: 90.3 h h
b. Answer: 9 h
10. In the NEC, UL is the abbreviation for
h h h h .h h h h
a. NEC® Reference: Annex I, footnote under Table I.3
h h h h h h h
b. Answer: Underwriters Laboratories h h
11. Equipment that is listed, labeled, or both, or identified for a use shall be installed
h h h h h h h h h h h h h h
and used in accordance with any
h h h h included in the listing, labeling, or
h h h h h h h h h
identification.
h
a. NEC® Reference: 110.3(B) h h
b. Answer: instructions h
© h2024 hCengage. hAll hRights hReserved. hMay hnot hbe hscanned, hcopied hor hduplicated, hor hposted hto ha hpublicly haccessible 2
website, hin hwhole hor hin hpart.
, Solution hand hAnswer hGuide: hMiller/Sandefur, hIllustrated hGuide hto hthe hNEC®, h©2024, h9780357766712, hUnit h2: hDefinitions®
Solution and Answer Guide h h h
MILLER/SANDEFUR, ILLUSTRATED GUIDE TO THE NEC®, 21E, ©2024, 9780357766712;
H H H H H H H H
UNIT 2: DEFINITIONS®
H H H
TABLE OF CONTENTS H H
Unit 2 Competency Test.............................................................................................................................. 1
h h h
UNIT 2 COMPETENCY TEST H H H
1. A(n) branch circuit supplies two or more receptacles or outlets for
h h h h h h h h h h h
lighting and appliances.
h h h
a. NEC® Reference: Article 100 (Branch-Circuit, General Purpose)
h h h h h h
b. Answer: general purpose h h
2. is the largest amount of current capable of being delivered at a
h h h h h h h h h h h h
point on the electrical system during a short-circuit condition.
h h h h h h h h h
a. NEC® Reference: Article 100 (Fault Current, Available)
h h h h h h
b. Answer: Available fault current h h h
3. A(n) branch circuit consists of two or more ungrounded conductors
h h h h h h h h h h
having a potential difference between them, and a grounded conductor having equal
h h h h h h h h h h h h
potential difference between it and each ungrounded conductor of the circuit and that is
h h h h h h h h h h h h h h
connected to the neutral or grounded conductor of the system.
h h h h h h h h h h
a. NEC® Reference: multiwire h h
b. Answer: Article 100 (Branch-Circuit, Multiwire) h h h h
4. An intermittent operation in which load conditions are regularly recurrent is the definition
h h h h h h h h h h h h
of h h .
a. NEC® Reference: Article 100 (Duty, Periodic) h h h h h
b. Answer: periodic duty h h
5. The is the connection between the grounded-circuit conductor and
h h h h h h h h h
the equipment grounding conductor at the service.
h h h h h h h
a. NEC® Reference: Article 100 (Bonding Jumper, Main) h h h h h h
b. Answer: main bonding jumper h h h
© h2024 hCengage. hAll hRights hReserved. hMay hnot hbe hscanned, hcopied hor hduplicated, hor hposted hto ha hpublicly haccessible 1
website, hin hwhole hor hin hpart.
, Solution hand hAnswer hGuide: hMiller/Sandefur, hIllustrated hGuide hto hthe hNEC®, h©2024, h9780357766712, hUnit h2: hDefinitions®
6. A(n) h is used to connect the system grounded conductor or h h h h h h h h h
the equipment to a grounding electrode or to a point on the grounding electrode
h h h h h h h h h h h h h h
system.
h
a. NEC® Reference: Article 100 (Grounding Electrode Conductor)
h h h h h h
b. Answer: grounding electrode conductor h h h
7. Rainproof, raintight, or watertight equipment can fulfill the requirements for
h h h h h h h h h
where varying weather conditions other than wetness, such h h h h h h h h
as snow, ice, dust, or temperature extremes, are not a factor.
h h h h h h h h h h h
a. NEC® Reference: Article 100 (Weatherproof: Informational Note)
h h h h h h
b. Answer: weatherproof h
8. A(n) h is an intentionally constructed, low-impedance electrically h h h h h h
conductive path designed and intended to carry current during ground-fault events
h h h h h h h h h h h
from the point of a ground fault on a wiring system to the electrical supply source and
h h h h h h h h h h h h h h h h h
that facilitates the operation of the overcurrent protective device or ground-fault
h h h h h h h h h h h
detectors.
h
a. NEC® Reference: Article 100 (Ground Fault Current Path, Effective)
h h h h h h h h
b. Answer: effective ground-fault current path h h h h
9. A(n) h is a manual, nonautomatic, or automatic operated device used h h h h h h h h h
in conjunction with a transfer switch to provide a means of directly connecting load
h h h h h h h h h h h h h h
conductors to a power source and of disconnecting the transfer switch.
h h h h h h h h h h h
a. NEC® Reference: Article 100 (Transfer Switch, Bypass Isolation)
h h h h h h h
b. Answer: bypass isolation transfer switch h h h h
10. A surface, flush, or freestanding assemblage with a raceway, fittings, or other enclosure
h h h h h h h h h h h h
hprovided with one or more receptacles, for the purpose of supplying power to
h h h h h h h h h h h h
hutilization equipment is called a(n).
h h h h
a. NEC® Reference: Article 100 (Multioutlet Assembly)
h h h h h
b. Answer: multioutlet assembly h h
11. A raceway encased in 4 in. (102 mm) of concrete on the ground floor (in direct contact
h h h h h h h h h h h h h h h h
hwith the earth) shall be considered a(n)
h h location.
h h h h h h
a. NEC® Reference: Article 100 (Location, Wet)
h h h h h
b. Answer: wet h
12. A(n) h may consist of one or more sensing elements integral with h h h h h h h h h h
hthe motor-compressor and an external control device.
h h h h h h
a. NEC® Reference: Article 100 (Thermal Protector: Informational Note)
h h h h h h h
b. Answer: thermal protector h h
Solution and Answer Guide h h h
MILLER/SANDEFUR, ILLUSTRATED GUIDE TO THE NEC®, 21E, ©2024, 9780357766712; UNIT 1:
H H H H H H H H H H
INTRODUCTION TO THE NATIONAL ELECTRICAL CODE®
H H H H H H
TABLE OF CONTENTS H H
Unit 1 Competency Test.............................................................................................................................. 1
h h h
UNIT 1 COMPETENCY TEST
H H H
1. The National Fire Protection Association has acted as sponsor of the National Electrical
h h h h h h h h h h h h
Code since
h h .
a. NEC® Reference: Page 1 h h h
b. Answer: 1911 h
2. Informative Annex provides a list of product safety standards used for
h h h h h h h h h h h
product listing where that listing is required by the NEC.
h h h h h h h h h h
a. NEC® Reference: Informative Annex A h h h h
b. Answer: A h
3. Which chapters in the NEC apply generally to all installations?
h h h h h h h h h
a. NEC® Reference: 90.3 h h
b. Answer: Chapters 1, 2, 3, and 4 h h h h h h
4. Every three years, the National Electrical Code is revised, but the Code has only been on a
h h h h h h h h h h h h h h h h
three-year revision cycle since
h h . h h h
a. NEC® Reference: Page 1 h h h
b. Answer: 1975 h
5. The purpose of the National Electrical Code is the practical safeguarding of
h h h h h h h h h h h h
from hazards arising from the use of electricity.
h h h h h h h h
a. NEC® Reference: persons and property h h h h
b. Answer: 90.2(A) h
6. The original Code document was developed
h h in as a result of the united
h h h h h h h h h h h
efforts of various insurance, electrical, architectural, and allied interests.
h h h h h h h h h
a. NEC® Reference: Page 1 h h h
b. Answer: 1897 h
© h2024 hCengage. hAll hRights hReserved. hMay hnot hbe hscanned, hcopied hor hduplicated, hor hposted hto ha hpublicly haccessible 1
website, hin hwhole hor hin hpart.
,Solution hand hAnswer hGuide: hMiller/Sandefur, hIllustrated hGuide hto hthe hNEC®, h©2024, h9780357766712, hUnit h1: hIntroduction hto hthe hNational hElectrical hCode®
7. Informative annexes are not part of the requirements of the NEC but are included for
h h h h h h h h h h h h h h
only. h
a. NEC® Reference: 90.3 h h
b. Answer: informational purposes h h
8. What city was home to the first central-station electric generating plant developed by
h h h h h h h h h h h h
Thomas A. Edison?
h h h
a. NEC® Reference: Page 2 h h h
b. Answer: New York City h h h
9. Chapter h consists of tables that are applicable as referenced. h h h h h h h h
a. NEC® Reference: 90.3 h h
b. Answer: 9 h
10. In the NEC, UL is the abbreviation for
h h h h .h h h h
a. NEC® Reference: Annex I, footnote under Table I.3
h h h h h h h
b. Answer: Underwriters Laboratories h h
11. Equipment that is listed, labeled, or both, or identified for a use shall be installed
h h h h h h h h h h h h h h
and used in accordance with any
h h h h included in the listing, labeling, or
h h h h h h h h h
identification.
h
a. NEC® Reference: 110.3(B) h h
b. Answer: instructions h
© h2024 hCengage. hAll hRights hReserved. hMay hnot hbe hscanned, hcopied hor hduplicated, hor hposted hto ha hpublicly haccessible 2
website, hin hwhole hor hin hpart.
, Solution hand hAnswer hGuide: hMiller/Sandefur, hIllustrated hGuide hto hthe hNEC®, h©2024, h9780357766712, hUnit h2: hDefinitions®
Solution and Answer Guide h h h
MILLER/SANDEFUR, ILLUSTRATED GUIDE TO THE NEC®, 21E, ©2024, 9780357766712;
H H H H H H H H
UNIT 2: DEFINITIONS®
H H H
TABLE OF CONTENTS H H
Unit 2 Competency Test.............................................................................................................................. 1
h h h
UNIT 2 COMPETENCY TEST H H H
1. A(n) branch circuit supplies two or more receptacles or outlets for
h h h h h h h h h h h
lighting and appliances.
h h h
a. NEC® Reference: Article 100 (Branch-Circuit, General Purpose)
h h h h h h
b. Answer: general purpose h h
2. is the largest amount of current capable of being delivered at a
h h h h h h h h h h h h
point on the electrical system during a short-circuit condition.
h h h h h h h h h
a. NEC® Reference: Article 100 (Fault Current, Available)
h h h h h h
b. Answer: Available fault current h h h
3. A(n) branch circuit consists of two or more ungrounded conductors
h h h h h h h h h h
having a potential difference between them, and a grounded conductor having equal
h h h h h h h h h h h h
potential difference between it and each ungrounded conductor of the circuit and that is
h h h h h h h h h h h h h h
connected to the neutral or grounded conductor of the system.
h h h h h h h h h h
a. NEC® Reference: multiwire h h
b. Answer: Article 100 (Branch-Circuit, Multiwire) h h h h
4. An intermittent operation in which load conditions are regularly recurrent is the definition
h h h h h h h h h h h h
of h h .
a. NEC® Reference: Article 100 (Duty, Periodic) h h h h h
b. Answer: periodic duty h h
5. The is the connection between the grounded-circuit conductor and
h h h h h h h h h
the equipment grounding conductor at the service.
h h h h h h h
a. NEC® Reference: Article 100 (Bonding Jumper, Main) h h h h h h
b. Answer: main bonding jumper h h h
© h2024 hCengage. hAll hRights hReserved. hMay hnot hbe hscanned, hcopied hor hduplicated, hor hposted hto ha hpublicly haccessible 1
website, hin hwhole hor hin hpart.
, Solution hand hAnswer hGuide: hMiller/Sandefur, hIllustrated hGuide hto hthe hNEC®, h©2024, h9780357766712, hUnit h2: hDefinitions®
6. A(n) h is used to connect the system grounded conductor or h h h h h h h h h
the equipment to a grounding electrode or to a point on the grounding electrode
h h h h h h h h h h h h h h
system.
h
a. NEC® Reference: Article 100 (Grounding Electrode Conductor)
h h h h h h
b. Answer: grounding electrode conductor h h h
7. Rainproof, raintight, or watertight equipment can fulfill the requirements for
h h h h h h h h h
where varying weather conditions other than wetness, such h h h h h h h h
as snow, ice, dust, or temperature extremes, are not a factor.
h h h h h h h h h h h
a. NEC® Reference: Article 100 (Weatherproof: Informational Note)
h h h h h h
b. Answer: weatherproof h
8. A(n) h is an intentionally constructed, low-impedance electrically h h h h h h
conductive path designed and intended to carry current during ground-fault events
h h h h h h h h h h h
from the point of a ground fault on a wiring system to the electrical supply source and
h h h h h h h h h h h h h h h h h
that facilitates the operation of the overcurrent protective device or ground-fault
h h h h h h h h h h h
detectors.
h
a. NEC® Reference: Article 100 (Ground Fault Current Path, Effective)
h h h h h h h h
b. Answer: effective ground-fault current path h h h h
9. A(n) h is a manual, nonautomatic, or automatic operated device used h h h h h h h h h
in conjunction with a transfer switch to provide a means of directly connecting load
h h h h h h h h h h h h h h
conductors to a power source and of disconnecting the transfer switch.
h h h h h h h h h h h
a. NEC® Reference: Article 100 (Transfer Switch, Bypass Isolation)
h h h h h h h
b. Answer: bypass isolation transfer switch h h h h
10. A surface, flush, or freestanding assemblage with a raceway, fittings, or other enclosure
h h h h h h h h h h h h
hprovided with one or more receptacles, for the purpose of supplying power to
h h h h h h h h h h h h
hutilization equipment is called a(n).
h h h h
a. NEC® Reference: Article 100 (Multioutlet Assembly)
h h h h h
b. Answer: multioutlet assembly h h
11. A raceway encased in 4 in. (102 mm) of concrete on the ground floor (in direct contact
h h h h h h h h h h h h h h h h
hwith the earth) shall be considered a(n)
h h location.
h h h h h h
a. NEC® Reference: Article 100 (Location, Wet)
h h h h h
b. Answer: wet h
12. A(n) h may consist of one or more sensing elements integral with h h h h h h h h h h
hthe motor-compressor and an external control device.
h h h h h h
a. NEC® Reference: Article 100 (Thermal Protector: Informational Note)
h h h h h h h
b. Answer: thermal protector h h
