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Questions and Answers
What is the key factor for successful clearing of ground fault currents?
What is the key factor for successful clearing of ground fault currents?
- Insulation resistance
- Grounding resistance
- Electrical continuity (correct)
- Voltage drop
Which of the following is NOT listed in NEC Section 250.92(A) as required items to be bonded together?
Which of the following is NOT listed in NEC Section 250.92(A) as required items to be bonded together?
- Grounding rods (correct)
- Cable trays
- Service cable armor or sheath
- Service raceways
In ensuring continuity at service equipment, which of the following methods is permitted according to NEC Section 250.92(8)?
In ensuring continuity at service equipment, which of the following methods is permitted according to NEC Section 250.92(8)?
- Connections utilizing threaded couplings or listed threaded hubs on enclosures if made up wrench-tight (correct)
- Using random nuts and bolts for connections
- Threadless couplings and connectors if not made up wrench-tight
- Bonding equipment to the grounded service conductor utilizing tape
What is the purpose of the equipment grounding conductor in an electrical system?
What is the purpose of the equipment grounding conductor in an electrical system?
What is the recommended method for splicing wire-type grounding electrode conductors?
What is the recommended method for splicing wire-type grounding electrode conductors?
When is it necessary to ground appliances like refrigerators, air conditioners, and washing machines?
When is it necessary to ground appliances like refrigerators, air conditioners, and washing machines?
What type of receptacles must be used in residential, commercial, or industrial applications?
What type of receptacles must be used in residential, commercial, or industrial applications?
When using metallic boxes, where should the equipment grounding conductors be attached?
When using metallic boxes, where should the equipment grounding conductors be attached?
In nonmetallic boxes with Type NM cable, where should the equipment grounding conductor be connected?
In nonmetallic boxes with Type NM cable, where should the equipment grounding conductor be connected?
Which of the following is a permitted form for equipment grounding conductors as stated by NEC?
Which of the following is a permitted form for equipment grounding conductors as stated by NEC?
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