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

,Solution and AnswerGuide IllustratedGuide to the Natio
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nal Electrical Code 9th Edition by Charles R. Miller
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ILLUSTRATED GUIDE TO THE NATIONAL ELECTRICAL CODE, 9TH ED. (C r r r r r r r r r



HARLES R. MILLER) r r




Chapter 1 — General r r r




Q1. TheNEC is primarily intended to:
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 A.Ensure efficiency ofelectrical systems
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 B. Provide safety fromelectrical hazards
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 C.Establish pricing for equipment
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 D. Define design details for engineers
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Answer: B r



Rationale: NEC’s scopeis safety— r r r r



minimizing risks of fire and shock.It does not address cost or design specifics.
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Q2. Which authority enforces the NEC locally?
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 A. NFPABoard
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 B. Authority Having Jurisdiction (AHJ)
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 C.Utility company
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 D. OSHAexclusively
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Answer: B r



Rationale: TheAHJ interprets and enforces the NEC, often local inspectors.
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Q3. Whichof the following is not covered bythe NEC?
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 A. Marine installations regulated byother codes
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 B. Dwelling units
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,  C.Commercial occupancies
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 D. Industrial occupancies
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Answer: A r



Rationale: NECexcludes ships,railways, and somecommunications facilities under o
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ther regulations.
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Q4. TheNEC defines a―qualified person‖ as:
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 A. Anyone with electrical knowledge
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 B.An individual with skills andsafety training to performelectrical tasks
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 C.A licensed engineer only
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 D.A certified inspector only
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Answer: B r



Rationale:Aqualified personhas demonstrated knowledge and training in equipment
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and safety practices.
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Q5. Which termmeans ―an electric circuit including conductorsbetween final overcurr
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ent device and outlet(s)‖?
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 A. Feeder
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 B. Branch circuit
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 C. Service conductors
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 D.Equipment grounding conductor
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Answer: B r



Rationale: Branch circuit runs from OCPDto outlets. Feeder runs between OCPD and
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other OCPD. r




Q6. Which coloridentifies anequipment grounding conductor?
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 A. White
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 B. Green orbare
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,  C. Red
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 D. Blue
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Answer: B r



Rationale: NEC requires green orbare copperforequipment grounding.
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Q7. What does the NEC consider―listed‖ equipment?
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 A. Approvedonly bymanufacturer
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 B.Approved bya qualified testing laboratorylike UL
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 C. Chosenby installer
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 D. Recommended byengineer
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Answer: B r



Rationale: ―Listed‖ =evaluated byrecognized independent testing lab.
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Q8. What is the purposeofthe Nationally Recognized Testing Laboratory (NRTL)?
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 A. Market products
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 B. Test and certify products forsafety compliance
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 C.Issueinstallation permits
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 D. Enforce NEC in the field
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Answer: B r



Rationale: NRTLsverify that products meet standards for safe installation.
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Q9. TheNEC is revised every:
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 A. 2 years
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 B. 3 years
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 C. 5 years
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 D. 10 years
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