IEC Special Occupancies and Equipment 2

Question 1

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

Accepted Answer

Rigid metal conduit (RMC)

Answer

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

Question 2

What NEC article governs electrical installations in health care facilities?

Accepted Answer

Article 517

Answer

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

Question 3

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

Accepted Answer

15 volts

Answer

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

Question 4

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

Accepted Answer

Area up to 18 inches above the floor

Answer

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.

Question 5

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

Accepted Answer

100 amperes

Answer

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

IEC - Independent Electrical Contractors Practice Test

IEC - Independent Electrical Contractors Practice Test

IEC Special Occupancies and Equipment 2