What is the voltage rating for a communication cable?
wires and cables must have a voltage rating of not less than 300 volts. The cable voltage rating is not be marked on the cable or on the undercarpet communications wire.
What is the voltage rating of Class 3 cables?
300 volts
Class 3 cables shall have a voltage rating of not less than 300 volts. Class 2 and Class 3 cables shall have a temperature rating of not less than 60°C (140°F).
What is the minimum size grounding electrode conductor required for a premises powered broadband communications system?
6 AWG
If a separate grounding electrode (such as a rod) is installed for a communications system, it must be bonded to the building’s power grounding electrode system with a minimum 6 AWG copper conductor [Sec. 800.100(D)].
What are network-powered broadband communications systems?
A network-powered broadband system is one that provides any combination of voice, audio, video, data, and interactive services through a network interface unit by a signal provided by a communications company.
What is NEC Article 800?
Article 800 is titled “Communication Circuits.” Within the NEC it goes on to define the scope of the article in 800.1 as: “This article covers communication circuits and equipment.” Therefore, to understand the scope of this article, it is necessary to understand the definition of a communication circuit.
Can you have 120V and 277V in same box?
Q. Can a junction box contain both 277V and 120V conductors? A. Yes, providing all conductors have an insulation voltage rating not less than the maximum circuit voltage (277V) [300.3(C)].
Does NEC apply to low voltage?
The National Electric Code (NEC) requires that low voltage power supplies and electrical wiring be Class 2 compliant. The code was created to prevent electrical fires and shock. If you are creating new construction or adding major modifications, you will most likely require an inspection.
Which of the following is not permitted to serve as an equipment grounding conductor?
Flexible metal conduit is never allowed as an equipment grounding conductor when flexibility is necessary after installation.
Which of the following NEC terms is best defined as connected connecting to ground or to a conductive body that extends the ground connection?
The purpose of the NEC. If a conductive part is connected to ground or to a conductive body that extends a ground connection, it is? grounded.
What does Chapter 9 of the NEC address?
NEC Chapter 9 is used for combinations of conductors of different sizes or insulation types installed in the same conduit or tubing.
What is the difference between Article 810 and article 820?
Article 820 covers the distribution of television and radio signals via cable. This is in contrast to Art. 810, which covers the distribution of television and radio signals via antenna. Any installation involving coaxial cables that connect antennas to any of the following must comply with Art. 820: Television receiving equipment [810.3].
What does code 820 mean in electrical?
National Electrical Code; Code Basics; Article 820: Community Antenna TV and Radio Distribution Systems. Article 820 covers the distribution of television and radio signals via cable. This is in contrast to Art. 810, which covers the distribution of television and radio signals via antenna.
Are coaxial cables required to comply with art 820?
Any installation involving coaxial cables that connect antennas to any of the following must comply with Art. 820: Television receiving equipment [810.3]. Radio receiving equipment [810.3]. Community television systems Voice your opinion!
Are ground (ing) rods NEC Article 810 compliant?
A) Generally yes, NEC Articles 800, 810, 820, and 830 permit the use of ground(ing) rods. However, Article 820.100(D) specifies that each ground rod must be bonded to the building grounding electrode system with a No. 6 AWG copper wire using a separate clamp on the rod for attachment of the bonding conductor. 3.