Free E2 Special Occupancies Questions and Answers 1

Question 1

An inspector is reviewing the electrical installation in a patient care space of a hospital. According to NEC Article 517, which of the following wiring methods is required for all branch circuits serving this area?

Accepted Answer

A metal raceway or a cable with a metallic armor or sheath

Answer

NEC 517.13(A) requires that all branch circuits serving patient care spaces be installed in a metal raceway or in a cable with a metallic armor or sheath that qualifies as an equipment grounding conductor. This is to provide a redundant ground path and enhanced physical protection for the wiring in these critical areas.

Question 2

In a commercial garage used for vehicle repair, what is the classified hazardous area on a floor at grade level, according to NEC Article 511?

Accepted Answer

The area up to 18 inches above the floor is a Class I, Division 2 location.

Answer

NEC 511.3(B)(1) classifies the area on any floor at or above grade level in a commercial repair garage as a Class I, Division 2 location up to a level of 18 inches above the floor. This is due to the potential presence of flammable gasoline vapors, which are heavier than air and tend to accumulate near the floor.

Question 3

Which of the following fixed wiring methods is generally permitted in a theater's auditorium classified as an assembly occupancy under NEC Article 518, provided it is not required to be of fire-rated construction?

Accepted Answer

Nonmetallic-sheathed cable (Type NM)

Answer

NEC 518.4(C) permits the use of wiring methods from Chapters 1 through 4, including nonmetallic-sheathed cable, in areas of an assembly occupancy that are not required by the building code to have a fire-rated construction. However, 518.4(A) requires more robust wiring methods like metal raceways for areas that must be fire-rated.

Question 4

An electrical inspector is examining a movie theater. According to NEC Article 520, branch circuits supplying footlights, border lights, and proscenium sidelights are generally limited to what maximum amperage?

Accepted Answer

20 amperes

Answer

NEC 520.41(A) specifies that branch circuits supplying footlights, border lights, and proscenium sidelights shall not exceed 20 amperes. An exception exists for circuits supplying heavy-duty lampholders, which can be rated higher as per Article 210.

Question 5

In a Class I, Division 1 hazardous location, which of the following wiring methods is permitted by NEC Article 501?

Accepted Answer

Threaded rigid metal conduit (RMC) or threaded steel intermediate metal conduit (IMC)

Answer

NEC 501.10(A) explicitly permits threaded rigid metal conduit (RMC) and threaded steel intermediate metal conduit (IMC) for use in Class I, Division 1 locations. These methods are required to contain explosions and prevent the ignition of surrounding flammable gases or vapors.

(E2) E2 Commercial Electrical Inspector Practice Test

(E2) E2 Commercial Electrical Inspector Practice Test

Free E2 Special Occupancies Questions and Answers 1