General Requirements and Definitions Flashcards
7 cards from real NEC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 General Requirements and Definitions flashcards as text
NEC Section 110.21(B) requires field-applied hazard markings to be:
Answer: Of sufficient durability to withstand the environment involved
NEC 110.21(B) requires that field-applied hazard markings be permanent, legible, and of sufficient durability to withstand the environment where they are installed.
According to NEC Article 100, what distinguishes a 'grounding electrode' from a 'grounding electrode conductor' (GEC)?
Answer: A grounding electrode is a conducting element in direct contact with earth; the GEC is the conductor connecting the grounding electrode to the electrical system
The grounding electrode is the physical element in direct contact with earth, while the GEC is the conductor that connects the grounding electrode to the electrical system.
Under NEC 110.22, identification of overcurrent devices must be:
Answer: Legible and of a durable means that will withstand the environment
NEC 110.22 requires that every circuit breaker and fusible switch be legibly identified as to its clear, evident, and specific purpose using durable means.
Which of the following is NOT included in the NEC's definition of a 'building'?
Answer: A vehicle with permanent electrical connections
The NEC defines a building as a structure that stands alone or is cut off from adjoining structures by fire walls; vehicles and mobile homes are addressed under separate articles.
NEC Section 110.16(A) requires arc-flash hazard warning labels on which equipment?
Answer: All panelboards, switchboards, switchgear, industrial control panels, and motor control centers likely to require examination while energized in other than dwelling units
NEC 110.16(A) requires arc-flash warning labels on switchboards, switchgear, panelboards, industrial control panels, and motor control centers in other than dwelling units that are likely to require examination, adjustment, servicing, or maintenance while energized.
Under NEC Article 100, a 'separately derived system' is one that:
Answer: Has no direct electrical connection to supply conductors originating in another system
A separately derived system has no direct electrical connection (including a solidly connected grounded circuit conductor) to the supply conductors originating in another system, such as a transformer secondary.
According to NEC 110.26(A)(3), what is the minimum headroom of working spaces for service equipment, switchboards, and panelboards?
Answer: 6.5 ft (2.0 m)
NEC 110.26(A)(3) requires a minimum headroom of 2.0 m (6 ft 6 in) for working spaces about service equipment, switchboards, switchgear, panelboards, or motor control centers.