LECTRICAL CODE 9TH EDITION BY CHARLES R. MI br br br br br br br
LLER CHAPTER 1- br br
19 FULL MANUAL WITH VERIFIED SOLUTIONS
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MILLER/SANDEFUR, ILLUSTRATED GUIDE TO BR B R BR B R THE BR NEC®, 21E, ©2024, 978035776671 BR BR BR
2; UNIT 1: INTRODUCTION TO THE NATIONAL ELECTRICAL CODE®
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TABLE OF CONTENTSBR BR
Unit 1 Competency Test............................................................................................................... 1
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UNIT1COMPETENCY TEST B R
1. The National Fire Protection Association has acted as sponsor of the
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National Electrical Code since . br br br
a. NEC®Reference: Page 1 br br
b. Answer:1911
2. Informative Annex br br
provides a list of productsafetystandards used f br br br br br br
or product listing where that listing is required by the NEC.
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a. NEC®Reference:InformativeAnnexA
b. Answer:A
3. Which chapters in the NEC apply generally to all installations?
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a. NEC®Reference: 90.3 br
b. Answer: Chapters 1, 2, 3, and 4 br br br br br br
4. Every three years, the National Electrical Code is revised, but the Code has only been on
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a three- year revision cycle since
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a. NEC®Reference: Page 1 br br
b. Answer:1975
5. The purpose of the National Electrical Code is the practical safeguarding of
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br from hazards arising from the use of electricity.
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a. NEC®Reference:personsand property b r
b. Answer:90.2(A)
6. The original Code document was developed
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inas aresult of the br br br br br
united efforts of various insurance, electrical, architectural, and allied interests.
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a. NEC®Reference: Page 1 br br
b. Answer:1897
,7. Informative annexes are not part of the requirements of the NEC but are included for
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only.
a. NEC®Reference: 90.3 br
b. Answer: informational purposes br br
8. What citywas home to the first central-
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station electric generating plant developed by Thomas A. Edison?
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a. NEC®Reference: Page 2 br br
b. Answer:New York City br br br
9. Chapter consists of tables that are applicable as referenced.
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a. NEC®Reference: 90.3 br
b. Answer:9
10. In the NEC, UL is the abbreviation for
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a. NEC®Reference:Annex I,footnoteunder Table I.3 br br br br br
b. Answer: Underwriters Laboratories br br
11. Equipment that is listed, labeled, or both, or identified for a use shall be installed an
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d used in accordance with any
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included in the listing, labeling, br br br br br
or identification.
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a. NEC®Reference: 110.3(B) br
b. Answer:instructions
, 3|P a g e
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Solutionand AnswerGuide b r
MILLER/SANDEFUR, ILLUSTRATED GUIDE BR B R B R TO B R THE B R NEC®, 21E, ©2024, 978035776 BR BR BR
6712; UNIT 2: DEFINITIONS®
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TABLE OF CONTENTS BR BR
Unit 2 Competency Test............................................................................................................... 1
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UNIT2COMPETENCY TEST B R
1. A(n) br
branch circuit supplies two or morereceptacles or o br br br br br br br br
utlets for lighting and appliances.
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a. NEC®Reference:Article100 (Branch-Circuit,GeneralPurpose) br
b. Answer:generalpurpose
2.
is thelargest amount of current capable of being delivered at a po br br br br br br br br br br br br
int on the electrical system during a short-circuit condition.
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a. NEC®Reference:Article100 (Fault Current, Available) br br br br
b. Answer: Available faultcurrent br br
3. A(n) br
branch circuit consists of two or more ungrounded cond br br br br br br br br
uctors having a potential difference between them, and a grounded conductor havin
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g equal potential difference between it and each ungrounded conductor of the circuit
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and that is connected to the neutral or grounded conductor of the system.
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a. NEC®Reference: multiwire br
b. Answer: Article100 (Branch-Circuit,Multiwire) br br
4. An intermittent operation in which load conditions are regularly recurrent is
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the definition of . br br br
a. NEC®Reference:Article100(Duty,Periodic)
b. Answer:periodic duty
5. The is theconnection between thegrounded-
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circuit conductor and the equipment grounding conductor at the service.
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a. NEC®Reference: Article 100 (Bonding Jumper, Main) br br br br
b. Answer: mainbonding jumper br br