Cable Installation Requirements

What are the general voltage and current limitations on cables for electrical installations involving network cabling, low-voltage control systems, occupancy sensors and power over ethernet (PoE) cables? Refer to the National Electrical Code and other industry literature to perform a safe, efficient installation.

1. Accessible portions of abandoned fire alarm cables shall be removed unless identified for future use with a tag of sufficient durability to withstand the surrounding environment.

Correct Answer: True

2. When cables penetrate through fire-rated walls that are separating rooms, what must be done according to life safety requirements?

Correct Answer: Seal penetration with approved fire caulking methods and materials

3. What type of ethernet cables can you use to supply devices that require PoE?

Correct Answer: Cat 5e

4. Cables used within plenums must be coated with fireretardant coatings such as Teflon and must be rated for use in environmental spaces for air circulation in building HVAC systems.

Correct Answer: True

5. What is considered to be the safe voltage for circuits that use PoE?

Correct Answer: A and B

6. According to the National Electrical Code and OSHA, a Class 1 power-limited circuit supply source is limited to ______ volt-amperes.

Correct Answer: 1000

7. Flexible cords and cables shall not be used ______.

Correct Answer: All of the above

8. A Class 1 remote control circuit or Class 1 signaling circuit has a maximum voltage rating of ______.

Correct Answer: 600V

9. Communication conductors installed on poles can be attached to a crossarm that also carries light and power conductors.

Correct Answer: False

10. Flexible cords used with temporary and portable lights must be designed for ______ usage.

Correct Answer: Medium or hard