IEC Special Occupancies and Equipment 5

Question 1

In a health care facility, the essential electrical system must restore power to life safety circuits within:

Accepted Answer

10 seconds

Answer

NEC 517.31 requires the life safety branch of the essential electrical system to restore power within 10 seconds of a normal power failure.

Question 2

A spray booth used for applying flammable finishes is classified as which type of hazardous location?

Accepted Answer

Class I, Division 1

Answer

Spray booths using flammable liquids or coatings are classified as Class I, Division 1 because flammable vapors are present during normal operations.

Question 3

Equipotential bonding around a swimming pool is required to bond metal parts within how many inches of the inside wall of the pool?

Accepted Answer

5 inches

Answer

NEC 680.26 requires all metal parts within 5 feet of the inside walls of a pool to be bonded together to eliminate voltage gradients.

Question 4

In a recreational vehicle park, each RV site must be provided with at minimum which electrical supply?

Accepted Answer

20- and 30-ampere, 120-volt

Answer

NEC 551.71 requires each RV site to have at least one 20-ampere and one 30-ampere, 120-volt receptacle to accommodate different RV configurations.

Question 5

What must be installed at the point where flexible conduit connects to a motor in a Class I, Division 1 location?

Accepted Answer

An explosion-proof flexible connector listed for the location

Answer

Flexible connections to motors in Class I, Division 1 locations must use explosion-proof flexible fittings listed for use in those hazardous locations.

IEC - Independent Electrical Contractors Practice Test

IEC - Independent Electrical Contractors Practice Test

IEC Special Occupancies and Equipment 5