Journeyman Electrician’s Exam Journeyman Electrician's Low Voltage Systems 3

Question 1

NEC Article 800 covers the installation of which type of systems?

Accepted Answer

Communications circuits such as telephone and data cables

Answer

Article 800 covers communications circuits, including telephone, telegraph, outside wiring for alarms, and similar central station communication systems.

Question 2

Per NEC Article 800, communications cables entering a building must be:

Accepted Answer

Protected against physical damage at the point of entry

Answer

Per NEC 800.110, communications cables must be protected from physical damage at the point where they enter the building.

Question 3

Under NEC Article 800, the primary protector for communications circuits must be located:

Accepted Answer

As close as practicable to the point where the conductors enter the building

Answer

NEC 800.90(B) requires the primary protector to be located as close as practicable to the point of entry to minimize the exposure of interior building wiring to lightning surges.

Question 4

NEC Article 820 covers the installation of which type of cabling system?

Accepted Answer

Coaxial cable for CATV and antenna distribution systems

Answer

Article 820 specifically addresses coaxial cable installed for Community Antenna Television (CATV) and radio distribution systems in buildings.

Question 5

The communications cable type designated 'CMR' is listed and rated for which specific application?

Accepted Answer

Riser applications — vertical runs between floors

Answer

CMR (Communications Riser) cable is listed for vertical runs in building risers and must resist the spread of fire from floor to floor per NEC Article 800.

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Journeyman Electrician's Low Voltage Systems 3