Special Occupancies and Equipment Flashcards
7 cards from real IEC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Special Occupancies and Equipment flashcards as text
In a health care facility, the essential electrical system must restore power to life safety circuits within:
Answer: 10 seconds
NEC 517.31 requires the life safety branch of the essential electrical system to restore power within 10 seconds of a normal power failure.
A spray booth used for applying flammable finishes is classified as which type of hazardous location?
Answer: Class I, Division 1
Spray booths using flammable liquids or coatings are classified as Class I, Division 1 because flammable vapors are present during normal operations.
Equipotential bonding around a swimming pool is required to bond metal parts within how many inches of the inside wall of the pool?
Answer: 5 inches
NEC 680.26 requires all metal parts within 5 feet of the inside walls of a pool to be bonded together to eliminate voltage gradients.
In a recreational vehicle park, each RV site must be provided with at minimum which electrical supply?
Answer: 20- and 30-ampere, 120-volt
NEC 551.71 requires each RV site to have at least one 20-ampere and one 30-ampere, 120-volt receptacle to accommodate different RV configurations.
What must be installed at the point where flexible conduit connects to a motor in a Class I, Division 1 location?
Answer: An explosion-proof flexible connector listed for the location
Flexible connections to motors in Class I, Division 1 locations must use explosion-proof flexible fittings listed for use in those hazardous locations.
For a patient care area in a hospital, the branch circuit must supply no more than how many patient bed locations?
Answer: 2
NEC 517.18 limits each branch circuit in general patient care areas to serving no more than two patient bed locations.
In an aircraft hangar, the area within 5 feet of any aircraft engine fuel tank is classified as:
Answer: Class I, Division 1
NEC 513.3 classifies the area within 5 feet of aircraft fuel tanks as Class I, Division 1 due to the likelihood of flammable vapor release during fueling operations.