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Solution and Answer Guide Illustrated Guide to the National Electrical Code 9th Edition by Charles R. Miller Chapter 1-50 Exam (1 2)R206,29
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Chapter 1: Introduction
Which of the following is the primary purpose of the National Electrical Code (NEC)?
A) To standardize electrical appliance design
B) To ensure safe installation of electrical systems
C) To regulate electrical equipment prices
D) To define electrical system performance
Answer: B) To ensure safe installation of electrical systems
What is the role of the NEC Code Making Panels?
,A) To enforce electrical safety regulations
B) To draft and revise NEC provisions
C) To inspect electrical installations
D) To educate electricians on NEC updates
Answer: B) To draft and revise NEC provisions
Chapter 2: Definitions and General Rules
Which term refers to a non-metallic, insulated conductor used in residential wiring?
A) Conduit
B) Cable
C) Raceway
D) Busbar
Answer: B) Cable
According to the NEC, what does the term “Accessible” mean?
A) Capable of being reached without removing any part of the building
B) Readily accessible without the use of tools
C) Capable of being reached and removed by a qualified person
D) Available to the general public for inspection
Answer: C) Capable of being reached and removed by a qualified person
Chapter 3: Wiring Methods
What is the minimum required size for a branch circuit conductor in a residential
dwelling unit according to NEC Article 310?
A) 14 AWG
B) 12 AWG
C) 10 AWG
D) 8 AWG
, Answer: B) 12 AWG
Which type of conduit is best suited for outdoor use in wet locations?
A) Rigid metal conduit (RMC)
B) Electrical metallic tubing (EMT)
C) Flexible metal conduit (FMC)
D) Non-metallic conduit (PVC)
Answer: A) Rigid metal conduit (RMC)
Chapter 4: Service and Service Equipment
What is the primary function of a service entrance?
A) To provide power to individual circuits
B) To isolate the electrical system from the utility supply
C) To connect the electrical system to the utility supply
D) To control the distribution of electrical power within a building
Answer: C) To connect the electrical system to the utility supply
According to NEC, what is the minimum height for a service entrance conductors
above grade in a residential area?
A) 8 feet
B) 10 feet
C) 12 feet
D) 15 feet
Answer: B) 10 feet
Chapter 5: Grounding and Bonding
What is the purpose of grounding in an electrical system?
A) To improve electrical conductivity
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