General Requirements for Wiring
Methods and Materials (Article 300) –
Questions And Answers | Latest Version
| 2024/2025 | Graded A+
Which wiring method is commonly used in residential installations?
A) Rigid metal conduit
✔✔B) Non-metallic sheathed cable (NM cable)
C) Flexible metal conduit
D) Underground feeder cable
What does "working space" refer to in the context of electrical installations?
✔✔A) The area required around electrical equipment for safe operation and maintenance.
B) The space used for storing tools and materials.
C) The area designated for office work in electrical facilities.
D) The distance between electrical poles in a residential area.
What is required when using conductors in a wet location?
✔✔A) They must be rated for wet locations to ensure safety and functionality.
1
,B) They can use any type of insulation material.
C) No special requirements are necessary for wet locations.
D) Only copper conductors are permitted.
What is a common requirement for installing raceways?
✔✔A) They must be securely fastened to prevent movement or displacement.
B) They can be left unsupported for short runs.
C) They should be painted to match the surrounding area.
D) They can be installed without any junction boxes.
How should electrical connections be made to ensure safety?
A) By twisting wires together and using electrical tape
✔✔B) By using approved connectors or terminal blocks
C) By soldering wires without insulation
D) By tying wires with string
What is the purpose of grounding in electrical systems?
✔✔A) To protect against electric shock and ensure equipment safety.
2
,B) To enhance the aesthetic appeal of installations.
C) To reduce energy consumption.
D) To improve signal strength in electrical systems.
Which of the following is NOT an acceptable wiring method?
✔✔A) Running exposed conductors in a basement without protection.
B) Using armored cable for branch circuits.
C) Installing raceways in a ceiling space.
D) Using conduit for outdoor installations.
What is required for conducting a visual inspection of wiring systems?
A) Only qualified electricians can perform the inspection.
✔✔B) The installation must be free of physical damage and deterioration.
C) The inspection can be done with the power on.
D) Color-coded wires do not need to be checked.
In which situation would a fire alarm system require specific wiring methods?
✔✔A) When installed in a commercial building where it must meet local code requirements.
3
, B) When it is connected to a home security system.
C) When used in outdoor installations only.
D) When it is installed in a residential garage.
What is the maximum allowable number of conductors in a raceway, according to Article 300?
✔✔A) It depends on the raceway size and the size of the conductors being used.
B) There is a fixed number that applies to all raceways.
C) No more than two conductors are allowed in any raceway.
D) All raceways can only hold a maximum of four conductors.
What should be done if conductors are damaged during installation?
✔✔A) They must be replaced before the system is energized.
B) They can be repaired with electrical tape.
C) They can be left as is if they are not visibly damaged.
D) Only the outer insulation needs to be repaired.
All conductors of the same circuit, including the grounded (neutral) and equipment grounding
conductors and bonding conductors shall be contained within the same ________, unless
otherwise permitted elsewhere in the Code.
4
Methods and Materials (Article 300) –
Questions And Answers | Latest Version
| 2024/2025 | Graded A+
Which wiring method is commonly used in residential installations?
A) Rigid metal conduit
✔✔B) Non-metallic sheathed cable (NM cable)
C) Flexible metal conduit
D) Underground feeder cable
What does "working space" refer to in the context of electrical installations?
✔✔A) The area required around electrical equipment for safe operation and maintenance.
B) The space used for storing tools and materials.
C) The area designated for office work in electrical facilities.
D) The distance between electrical poles in a residential area.
What is required when using conductors in a wet location?
✔✔A) They must be rated for wet locations to ensure safety and functionality.
1
,B) They can use any type of insulation material.
C) No special requirements are necessary for wet locations.
D) Only copper conductors are permitted.
What is a common requirement for installing raceways?
✔✔A) They must be securely fastened to prevent movement or displacement.
B) They can be left unsupported for short runs.
C) They should be painted to match the surrounding area.
D) They can be installed without any junction boxes.
How should electrical connections be made to ensure safety?
A) By twisting wires together and using electrical tape
✔✔B) By using approved connectors or terminal blocks
C) By soldering wires without insulation
D) By tying wires with string
What is the purpose of grounding in electrical systems?
✔✔A) To protect against electric shock and ensure equipment safety.
2
,B) To enhance the aesthetic appeal of installations.
C) To reduce energy consumption.
D) To improve signal strength in electrical systems.
Which of the following is NOT an acceptable wiring method?
✔✔A) Running exposed conductors in a basement without protection.
B) Using armored cable for branch circuits.
C) Installing raceways in a ceiling space.
D) Using conduit for outdoor installations.
What is required for conducting a visual inspection of wiring systems?
A) Only qualified electricians can perform the inspection.
✔✔B) The installation must be free of physical damage and deterioration.
C) The inspection can be done with the power on.
D) Color-coded wires do not need to be checked.
In which situation would a fire alarm system require specific wiring methods?
✔✔A) When installed in a commercial building where it must meet local code requirements.
3
, B) When it is connected to a home security system.
C) When used in outdoor installations only.
D) When it is installed in a residential garage.
What is the maximum allowable number of conductors in a raceway, according to Article 300?
✔✔A) It depends on the raceway size and the size of the conductors being used.
B) There is a fixed number that applies to all raceways.
C) No more than two conductors are allowed in any raceway.
D) All raceways can only hold a maximum of four conductors.
What should be done if conductors are damaged during installation?
✔✔A) They must be replaced before the system is energized.
B) They can be repaired with electrical tape.
C) They can be left as is if they are not visibly damaged.
D) Only the outer insulation needs to be repaired.
All conductors of the same circuit, including the grounded (neutral) and equipment grounding
conductors and bonding conductors shall be contained within the same ________, unless
otherwise permitted elsewhere in the Code.
4
