NEC General Requirements Flashcards
7 cards from real Licensed Electrical Contractor practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 NEC General Requirements flashcards as text
Under NEC 110.16, arc-flash hazard warning labels are required on electrical equipment likely to require examination, adjustment, servicing, or maintenance while energized in which occupancy types?
Answer: Other than dwelling units
NEC 110.16 requires arc-flash warning labels on switchboards, panelboards, and similar equipment in other than dwelling units.
What is the NEC requirement for securing unused openings in electrical enclosures?
Answer: They must be effectively closed to provide protection equivalent to the enclosure wall
NEC 110.12(A) requires unused openings in electrical enclosures to be effectively closed to provide protection equivalent to the wall of the enclosure.
According to NEC 110.26(B), the working space width in front of electrical equipment must be:
Answer: At least 30 inches wide or the width of the equipment, whichever is greater
NEC 110.26(B) requires the working space width to be at least 30 inches wide or the width of the equipment, whichever is greater.
Which NEC article contains the general requirements for electrical installations that apply to all wiring methods?
Answer: Article 110
NEC Article 110 contains the general requirements for electrical installations including examination, installation, and connections of equipment.
Per NEC 110.31, electrical installations in vaults, rooms, or closets used exclusively for electrical equipment rated over 600V must have:
Answer: Entrances that are kept locked and accessible only to qualified persons
NEC 110.31 requires that high-voltage installations in vaults, rooms, or closets be kept locked and accessible only to qualified personnel.
What does the NEC term 'listed' mean when applied to electrical equipment?
Answer: Included in a list published by a nationally recognized testing laboratory (NRTL) that maintains periodic inspection of production
Per NEC Article 100, 'listed' means equipment has been evaluated by a nationally recognized testing laboratory that maintains periodic inspections of production and provides a listing.
NEC 110.26(A)(3) requires a minimum headroom of 6.5 feet in working spaces for electrical equipment. What is the exception to this requirement?
Answer: Existing buildings where service equipment or panelboards do not exceed 200A
NEC 110.26(A)(3) Exception 1 allows existing service equipment or panelboards not exceeding 200A in existing buildings to have less than 6.5 feet of headroom.