NEC Special Occupancies & Hazardous Locations 2

Question 1

In Class I, Division 1 hazardous locations, what general type of electrical equipment is required for most fixed wiring applications?

Accepted Answer

Explosion-proof or intrinsically safe listed equipment

Answer

Class I, Division 1 locations require explosion-proof or intrinsically safe equipment to prevent any electrical arc or heat from igniting the surrounding flammable atmosphere.

Question 2

NEC Article 547 provides electrical wiring requirements for which type of special occupancy?

Accepted Answer

Agricultural buildings

Answer

Article 547 covers agricultural buildings, addressing unique hazards such as combustible dust, corrosive atmospheres, and high moisture levels found in farm structures.

Question 3

What is the primary purpose of equipotential bonding required by NEC 680.26 in and around swimming pool areas?

Accepted Answer

To minimize voltage gradients in and around the pool area

Answer

Equipotential bonding per NEC 680.26 minimizes voltage differences between conductive surfaces in the pool area, preventing voltage gradient hazards that could cause electric shock or electrocution.

Question 4

Which NEC article specifically governs electrical installations at motor fuel dispensing facilities such as gasoline stations?

Accepted Answer

Article 514

Answer

Article 514 covers motor fuel dispensing facilities including gasoline stations, propane dispensing, and compressed natural gas dispensing locations.

Question 5

NEC Article 700 covers which category of backup electrical system?

Accepted Answer

Emergency systems

Answer

Article 700 covers emergency systems required by law to automatically supply power to life-safety loads during a utility failure, such as exit lighting and fire alarm systems.

NEC Practice Test

NEC Practice Test

NEC Special Occupancies & Hazardous Locations 2