Where to Find Limited Energy Articles in the Code
ARTICLE 725 Class 1, Class 2, and Class 3 Remote-Control, Signaling, and Power-Limited Circuits
Article 725 covers requirements for remote-control, signaling, and power-limited circuits operating at various voltage and power levels.
I. General (725.1 through 725.35)
This part defines Class 1, 2, and 3 circuits and outlines requirements for safety and protection of circuits.
II. Class 1 Circuits (725.41 through 725.52)
This part offers requirements for protection of Class 1 circuits, including location of overcurrent devices, installation of cables in trays and raceways, and insulation of conductors.
III. Class 2 and Class 3 Circuits (725.121 through 725.154)
This part offers requirements for Class 2 and 3 circuits, their interconnection with one another and with Class 1 circuits, as well as their installation and use in different locations.
IV. Listing Requirements (725.179)
This part offers requirements for listing and marking of cables as fire resistant and suitable for use. Table 725.179 specifies listed cable types and their markings.
ARTICLE 760 Fire Alarm Systems
Article 760 covers the installation of wiring and equipment for fire alarm systems.
I. General (760.1 through 760.35)
This part introduces and defines some useful terms for the installation and protection of fire alarm systems. It also references NFPA 72, National Fire Alarm Code for information on the subject.
II. Non–Power-Limited Fire Alarm (NPLFA) Circuits (760.41 through 760.53)
Non–power-limited fire alarm (NPLFA) circuits generally use Chapter 3 wiring methods, but this part gives specific guidelines for conductor installation and materials and wiring of NPLFA systems.
III. Power-Limited Fire Alarm (PLFA) Circuits (760.121 through 760.154)
Power-limited fire alarm circuits (PLFA) are generally a Class 3 wiring method, but this part gives specific requirements for the installation and protection of wiring and materials for PLFA systems.
IV. Listing Requirements (760.176 and 760.179)
This part provides requirements for sizing conductors, and for listing and marking of cables in fire alarm circuits and their associated systems. Table 760.179(I) lists cable types and their markings.
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ARTICLE 770 Optical Fiber Cables and Raceways
Article 770 covers installation, protection, and listing of optical fiber cables and raceways and provides rules for installing fiber optic communications systems within buildings and similar structures. This article does not cover the construction of optical fiber raceways or cables.
I. General (770.1 through 770.26)
II. Cables Outside and Entering Buildings (770.48)
III. Protection (770.93)
IV. Grounding Methods (770.100 and 770.106)
V. Installation Methods Within Buildings (770.110 through 770.154)
VI. Listing Requirements (770.179 and 77.182)
ARTICLE 800 Communications Circuits
Article 800 covers telephone, telegraph, and outside wiring for fire alarm and burglar alarm systems connected to a central station. This article also covers computer networks installed using telephone-type twisted-pair cabling (Categories 3, 5, 5E, and 6). Such networks are considered by applicable industry standards to be a subset of telecommunications.
I. General (800.1 through 800.26)
II. Wires and Cables Outside and Entering Buildings (800.44 through 800.53)
III. Protection (800.90 and 800.93)
IV. Grounding Methods (800.100 and 800.106)
V. Installation Methods Within Buildings (800.110 through 800.156)
VI. Listing Requirements (800.170 through 800.182)
ARTICLE 820 Community Antenna Television and Radio Distribution Systems
Article 820 covers distribution of radio frequency signals by means of coaxial cable. Although the title refers to community antenna television (CATV) systems, its rules are also used for other types of systems wired with coaxial cable, including closed-circuit television and some computer networks.
I. General (820.1 through 820.26)
II. Coaxial Cables Outside and Entering Buildings (820.44 through 820.48)
III. Protection (820.93)
IV. Grounding Methods (820.100 and 820.106)
V. Installation Methods Within Buildings (820.110 through 820.154)
VI. Listing Requirements (820.179 and 820.182)
ARTICLE 830 Network-Powered Broadband Communications Systems
Article 830 covers broadband communications systems that deliver voice, audio, video, data, and interactive services by means of coaxial cable, with operating power delivered by means of the solid center conductor. Major concerns of Article 830 include power levels, cable types, and bonding and grounding.
I. General (830.1 through 830.24)
II. Cables Outside and Entering Buildings (830.40 through 830.47)
III. Protection (830.90 through 830.93)
IV. Grounding Methods (830.100 and 830.106)
V. Installation Methods Within Buildings (830.110 through 830.160)
VI. Listing Requirements (830.179)
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