PC Special Occupancies and Equipment 2

Question 1

In a Class II, Division 1 hazardous location involving combustible dust, which wiring method is specifically permitted by NEC Article 502?

Accepted Answer

Rigid metal conduit (RMC) with dusttight fittings

Answer

EMT with listed fittings

Answer

Type NM cable

Answer

Open wiring on insulators

Question 2

Under NEC Article 517, a 'patient care vicinity' in a healthcare facility extends how far from a patient bed?

Accepted Answer

6 feet horizontally and 7.5 feet above the floor

Answer

3 feet horizontally and 5 feet above the floor

Answer

4 feet horizontally and 6 feet above the floor

Answer

5 feet horizontally and 8 feet above the floor

Question 3

What is the maximum allowable distance between receptacles in a marina or boatyard pedestal installation per NEC Article 553?

Accepted Answer

The receptacle must be within 30 feet of the boat connection point

Answer

The receptacle must be within 15 feet of each slip

Answer

No specific distance limit is specified in NEC 553

Answer

Each slip must have its own dedicated receptacle within 50 feet

Question 4

For a permanently installed swimming pool, NEC 680.22 requires that no receptacle outlet be installed within what minimum distance from the inside wall of the pool?

Accepted Answer

15 feet

Answer

6 feet

Answer

10 feet

Answer

20 feet

Question 5

In an agricultural building covered by NEC Article 547, which wiring method is NOT permitted due to moisture and corrosive atmosphere concerns?

Accepted Answer

Type NM cable

Answer

Type UF cable

Answer

Rigid nonmetallic conduit (RNC)

Answer

Liquidtight flexible nonmetallic conduit

Question 6

Per NEC Article 511, a major repair garage requires that electrical equipment in the area within 18 inches of the floor be listed for use in what classification?

Accepted Answer

Class I, Division 2

Answer

Class II, Division 1

Answer

Class I, Division 1

Answer

General-purpose only

Question 7

Under NEC Article 550, a mobile home feeder must be rated at minimum how many amperes?

Accepted Answer

100 amperes

Answer

60 amperes

Answer

80 amperes

Answer

125 amperes