E2 Hazardous (Classified) Locations 2

Question 1

In a Class I, Division 2 location, which wiring method is generally acceptable?

Accepted Answer

Rigid metal conduit (RMC)

Answer

Rigid metal conduit is an approved wiring method for Class I, Division 2 locations per NEC Article 501.

Question 2

Which NEC article covers Class II hazardous locations involving combustible dust?

Accepted Answer

Article 502

Answer

NEC Article 502 specifically addresses Class II locations where combustible dust is the hazardous material.

Question 3

What is the primary purpose of sealing fittings in Class I hazardous locations?

Accepted Answer

To prevent the passage of gases, vapors, or flames

Answer

Sealing fittings in Class I locations prevent the passage of gases, vapors, or flames from one portion of the electrical installation to another.

Question 4

A spray paint booth where flammable liquids are used would typically be classified as which hazardous location?

Accepted Answer

Class I, Division 1

Answer

A spray paint booth where flammable vapors are present during normal operations is a Class I, Division 1 location.

Question 5

In the Zone classification system, Zone 0 corresponds most closely to which Division classification?

Accepted Answer

Division 1 only — continuous hazard

Answer

Zone 0 represents locations where ignitable concentrations of flammable gases or vapors are present continuously, corresponding to the most hazardous portion of Division 1.

(E2) E2 Commercial Electrical Inspector Practice Test

(E2) E2 Commercial Electrical Inspector Practice Test

E2 Hazardous (Classified) Locations 2