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

NEC 502.10 permits RMC with listed dusttight fittings in Class II, Division 1 locations to prevent ignition of combustible dust.

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

NEC 517.2 defines the patient care vicinity as the space within 6 feet horizontally and 7.5 feet above the floor from the patient bed.

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

NEC 553.4 requires shore power receptacles to be located within 30 feet of the connected vessel to minimize cord hazards.

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

NEC 680.22(A)(1) prohibits receptacle outlets within 6 feet of the inside walls of permanently installed pools, but no receptacle shall be within 10 feet unless GFCI protected, and 15 feet is the minimum for non-GFCI receptacles.

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

NEC 547.5 prohibits Type NM cable in agricultural buildings because the moisture and corrosive atmosphere degrade its jacket and conductors.

(PC) Professional Electrical Contractor Practice Test

(PC) Professional Electrical Contractor Practice Test

PC Special Occupancies and Equipment 2