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Questions and Answers
What is the primary purpose of grounding in residential electrical systems?
What is the primary purpose of grounding in residential electrical systems?
- To protect against electrical shock (correct)
- To decrease the resistance of the circuit
- To increase the voltage in the circuit
- To provide extra power to the circuits
In a residential electrical system, which color is typically used for grounding conductors?
In a residential electrical system, which color is typically used for grounding conductors?
- Black
- White
- Red
- Green or bare (correct)
Which type of wiring method is commonly preferred for residential electrical installations due to its flexibility and ease of installation?
Which type of wiring method is commonly preferred for residential electrical installations due to its flexibility and ease of installation?
- Nonmetallic-sheathed cable (correct)
- Metal-clad wiring
- Knob-and-tube wiring
- Conduit wiring
What is a characteristic of a circuit breaker in residential electrical systems?
What is a characteristic of a circuit breaker in residential electrical systems?
According to the National Electrical Code (NEC), what is the minimum height requirement for electrical outlets in residential buildings?
According to the National Electrical Code (NEC), what is the minimum height requirement for electrical outlets in residential buildings?
What is the purpose of a wire nut in residential electrical wiring?
What is the purpose of a wire nut in residential electrical wiring?
What is the function of a three-way switch in a residential electrical system?
What is the function of a three-way switch in a residential electrical system?
Which of the following statements about AFCI (Arc-Fault Circuit Interrupter) devices is true?
Which of the following statements about AFCI (Arc-Fault Circuit Interrupter) devices is true?
Which type of wiring method is commonly used for underground residential electrical installations?
Which type of wiring method is commonly used for underground residential electrical installations?
What is the function of a surge protector in a residential electrical system?
What is the function of a surge protector in a residential electrical system?
Which of the following statements about knob-and-tube wiring is true?
Which of the following statements about knob-and-tube wiring is true?
What is the main function of a light switch in a residential electrical system?
What is the main function of a light switch in a residential electrical system?
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