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Solution and Answer Guide Illustrated Guide to the National Electrical Code 9th Edition by Charles R. Miller Chapter 1-19 Exam (1 2) $17.49   Add to cart

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Solution and Answer Guide Illustrated Guide to the National Electrical Code 9th Edition by Charles R. Miller Chapter 1-19 Exam (1 2)

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Solution and Answer Guide Illustrated Guide to the National Electrical Code 9th Edition by Charles R. Miller Chapter 1-19 Exam (1 2)

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  • September 13, 2024
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Solution and Answer Guide




Chapter 1: General Requirements
What is the primary purpose of the National Electrical Code (NEC)?


A) To standardize electrical appliance manufacturing
B) To provide guidelines for the safe installation of electrical systems
C) To regulate the cost of electrical services
D) To promote the use of renewable energy sources
Answer: B) To provide guidelines for the safe installation of electrical systems


Which section of the NEC provides definitions and general requirements for
electrical installations?

,A) Article 100
B) Article 200
C) Article 300
D) Article 400
Answer: A) Article 100


Chapter 2: Wiring and Protection
What is the minimum size of a grounding conductor for a 200-amp service according
to NEC standards?


A) 8 AWG
B) 6 AWG
C) 4 AWG
D) 2 AWG
Answer: B) 6 AWG


Which type of cable is generally used for residential wiring?


A) PVC conduit
B) NM-B cable
C) EMT conduit
D) MC cable
Answer: B) NM-B cable


Chapter 3: Wiring Methods and Materials
Which type of conduit is suitable for outdoor and wet locations?


A) EMT
B) PVC
C) Rigid metal conduit
D) Flexible metal conduit

, Answer: B) PVC


What is the maximum allowable length for a single run of flexible conduit without
support according to NEC?


A) 3 feet
B) 4 feet
C) 6 feet
D) 8 feet
Answer: C) 6 feet


Chapter 4: Equipment for General Use
Which type of circuit breaker provides protection against both overloads and short
circuits?


A) Standard circuit breaker
B) AFCI breaker
C) GFCI breaker
D) Dual function breaker
Answer: A) Standard circuit breaker


Where should the service disconnecting means be located in a dwelling unit?


A) At the main electrical panel
B) Within sight of the service entrance
C) At the nearest accessible location
D) In a dedicated outdoor enclosure
Answer: B) Within sight of the service entrance


Chapter 5: Special Occupancies
In a commercial kitchen, what type of outlet is required for countertop surfaces?

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