Special Occupancies and Equipment Flashcards

In a Class I, Division 1 hazardous location, which wiring method is acceptable?

Answer: Rigid metal conduit (RMC)

Rigid metal conduit is approved for Class I, Division 1 locations because it provides the required explosion-proof enclosure integrity.

What NEC article governs electrical installations in health care facilities?

Answer: Article 517

NEC Article 517 specifically covers health care facilities including hospitals, nursing homes, and limited care facilities.

A swimming pool light fixture installed below the normal water level must be listed for use at what voltage or less?

Answer: 15 volts

NEC 680.23 requires luminaires installed facing upward within the pool to operate at 15 volts or less.

Which of the following areas in a commercial garage is classified as a Class I, Division 2 hazardous location?

Answer: Area up to 18 inches above the floor

In commercial garages, the area from floor level to 18 inches above the floor is classified Class I, Division 2 due to heavier-than-air gasoline vapors.

Mobile homes must have a minimum electrical service of at least how many amperes?

Answer: 100 amperes

NEC 550.11 requires mobile homes to have a minimum 100-ampere, 120/240-volt service.

In a theater, what is the required clearance above the stage floor for equipment operating over 150 volts to ground?

Answer: 8 feet

NEC Article 520 requires a minimum 8-foot clearance above the stage floor for exposed live parts over 150 volts in theaters.

For a carwash facility, all 125-volt, single-phase, 15- and 20-ampere receptacles must be protected by:

Answer: GFCI protection

Carwash facilities are wet locations requiring GFCI protection on all 125-volt, 15- and 20-ampere receptacles per NEC 422.5.