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Chapter 7 Special Conditions | 722.135(E) | The substitutions for cables listed in Table 722.135(E) shall be permitted. Where substitute cables are installed, the installation requirements of the articles described in 722.3(0) shall also apply. CI cables shall be permitted to be installed to provide 2-hour circuit integrity. See 722.135(F). Informational Note: S... | https://2023.antflix.net#722.135(E) |
Chapter 7 Special Conditions | 722.135(F) | CI cable, a fire-resistive cable system, or a listed electrical circuit protective system shall be permitted for use in systems that supply critical circuits to ensure survivability for continued circuit operation for a specified time under fire conditions. [722.135(F)](https://2023.antflix.net#722.135(F)) | https://2023.antflix.net#722.135(F) |
Chapter 7 Special Conditions | 722.135(G) | Conductors in Type PLTC cables used for Class 2 thermocouple circuits shall be permitted to be any of the materials used for thermocouple extension wire. [722.135(G)](https://2023.antflix.net#722.135(G)) | https://2023.antflix.net#722.135(G) |
Chapter 7 Special Conditions | 722.135(H) | Where 4-pair cables are used to transmit power and data to a powered device, 725.144 shall apply. [722.135(H)](https://2023.antflix.net#722.135(H)) | https://2023.antflix.net#722.135(H) |
Chapter 7 Special Conditions | 722.135(I) | Circuit conductors that extend beyond one building and are run such that they are subject to accidental contact with electric light or power conductors operating over 300 volts to ground, or are exposed to lightning on interbuilding circuits on the same premises, shall comply with the following: For other than coaxial ... | https://2023.antflix.net#722.135(I) |
Chapter 7 Special Conditions | 722.179 | Cables installed in buildings shall be listed in accordance with 722.179(A) and marked in accordance with 722.179(B), and they shall be permitted to be marked in accordance with 722.179(C). Exception: Optical fiber cables that are installed in compliance with 770.48 shall not be required to be listed. [722.179](https:/... | https://2023.antflix.net#722.179 |
Chapter 7 Special Conditions | 722.179(A) | Cables installed as wiring methods within buildings shall be listed as resistant to the spread of fire and other criteria in accordance with 722.179(A)(1) through (A) (16). Informational Note No. 1: See UL 13, Standard for Power-Limited Circuit Cables, for applicable requirements for listing of Class 2 and Class 3 cabl... | https://2023.antflix.net#722.179(A) |
Chapter 7 Special Conditions | 722.179(A)(1) | Plenum cable shall be listed as suitable for use in ducts, plenums, and other space for environmental air and shall be listed as having adequate fire-resistant and low-smoke producing characteristics. Refer to Table 722.179(B) for plenum cable types. Informational Note: See NFPA 262-2019, Standard Method of Test for Fl... | https://2023.antflix.net#722.179(A)(1) |
Chapter 7 Special Conditions | 722.179(A)(2) | Riser cable shall be listed as suitable for use in a vertical run in a shaft or from floor to floor and shall be listed as having fire-resistant characteristics capable of preventing the carrying of fire from floor to floor. Informational Note: See ANSI/UL 1666-2012, Test for Flame Propagation Height of Electrical and ... | https://2023.antflix.net#722.179(A)(2) |
Chapter 7 Special Conditions | 722.179(A)(3) | General-purpose cable shall be listed as resistant to the spread of fire and as suitable for general-purpose use, except for use in risers, ducts, plenums, and other space used for environmental air. Informational Note: See UL 2556, Wire and Cable lest Methods, for defining resistant to the spread of fire. One method i... | https://2023.antflix.net#722.179(A)(3) |
Chapter 7 Special Conditions | 722.179(A)(4) | Alternative general-purpose optical fiber cable shall be listed as suitable for general-purpose use, with the exception of risers and plenums, and shall also be resistant to the spread of fire. Informational Note: See CSA C22.2 No. 0.3-M-2001, Test Methods for Electrical Wires and Cables, for the CSA vertical flame tes... | https://2023.antflix.net#722.179(A)(4) |
Chapter 7 Special Conditions | 722.179(A)(5) | Limited-use cable shall be listed as suitable for use in dwellings and raceways and shall be listed as resistant to flame spread. Informational Note: See ANSI/UL 2556, Standard for Wire and Cable Test Methods, for one method of determining that cable is resistant to flame spread by testing the cable to the FV-2/VW-1 te... | https://2023.antflix.net#722.179(A)(5) |
Chapter 7 Special Conditions | 722.179(A)(6) | Type PLTC nonmetallic-sheathed, power-limited tray cable shall be listed as being suitable for cable trays, resistant to the spread of fire, and sunlight- and moisture-resistant. Type PLTC cable used in a wet location shall be listed for use in wet locations and marked "wet" or "wet location." Informational Note: See A... | https://2023.antflix.net#722.179(A)(6) |
Chapter 7 Special Conditions | 722.179(A)(7) | Cables that are used for survivability of critical circuits under fire conditions shall comply with either 722.179(A)(7)(a), (A)(7)(b), or (A)(7)(c). Informational Note: See NFPA 72, National Fire Alarm and Signaling Code, 12.4.3 and 12.4.4, for additional information on fire alarm CI cable, fire-resistive cable system... | https://2023.antflix.net#722.179(A)(7) |
Chapter 7 Special Conditions | 722.179(A)(8) | Class 3 single conductors used as other wiring within buildings shall be listed Type CL3 and shall not be smaller than 18 AWG. Informational Note: See ANSI/UL 1685-2010, Standard for Safety for Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables, for the UL flame exposure, vert... | https://2023.antflix.net#722.179(A)(8) |
Chapter 7 Special Conditions | 722.179(A)(9) | Class 2 and Class 3 LP cables shall be listed as suitable for carrying power and data up to a specified current limit for each conductor without exceeding the temperature rating of the cable. The cables shall be marked with the suffix "-LP (XXA)" where XXA designates the current limit in amperes per conductor. Informat... | https://2023.antflix.net#722.179(A)(9) |
Chapter 7 Special Conditions | 722.179(A)(10) | Undercarpet cable shall be listed as suitable for use under carpet, floor covering, modular tiles, and planks. Informational Note: See UL 444, Standard for Safety for Communications Cables, for the compressive loading test used to determine the suitability of cable for undercarpet use. [722.179(A)(10)](https://2023.ant... | https://2023.antflix.net#722.179(A)(10) |
Chapter 7 Special Conditions | 722.179(A)(11) | Cable used in a wet location shall be listed for use in wet locations and be marked "wet" or "wet location" or have a moisture-impervious metal sheath. [722.179(A)(11)](https://2023.antflix.net#722.179(A)(11)) | https://2023.antflix.net#722.179(A)(11) |
Chapter 7 Special Conditions | 722.179(A)(12) | Field-assembled optical fiber cable shall comply with 722.179(A) (12) (a) through (d). The specific combination of jacket and optical fibers intended to be installed as a field-assembled optical fiber cable shall be one of the types in 722.179(A)(1), (A)(2), or (A)(3) and shall be marked in accordance with Table 179(B)... | https://2023.antflix.net#722.179(A)(12) |
Chapter 7 Special Conditions | 722.179(A)(13) | Composite optical fiber cables shall be listed as electrical cables based on the type of electrical conductors. [722.179(A)(13)](https://2023.antflix.net#722.179(A)(13)) | https://2023.antflix.net#722.179(A)(13) |
Chapter 7 Special Conditions | 722.179(A)(14) | Class 2 cables shall have a voltage rating of not less than 150 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). [722.179(A)(14)](https://2023.antflix.net#722.179(A)(14)) | https://2023.antflix.net#722.179(A)(14) |
Chapter 7 Special Conditions | 722.179(A)(15) | PFLA cables shall comply with 722.179(A) (15) (a) through (A)(15)(d). Conductors for cables, other than coaxial cables, shall be solid or stranded copper. Coaxial cables shall be permitted to use 30 percent conductivity copper-covered steel center conductor wire.The size of conductors in a multiconductor cable shall no... | https://2023.antflix.net#722.179(A)(15) |
Chapter 7 Special Conditions | 722.179(A)(16)(1) | Conductors of sizes not smaller than 24 AWG shall be permitted to be used. [722.179(A)(16)(1)](https://2023.antflix.net#722.179(A)(16)(1)) | https://2023.antflix.net#722.179(A)(16)(1) |
Chapter 7 Special Conditions | 722.179(A)(16)(2) | Insulation on conductors shall be rated not less than 450 volts dc. [722.179(A)(16)(2)](https://2023.antflix.net#722.179(A)(16)(2)) | https://2023.antflix.net#722.179(A)(16)(2) |
Chapter 7 Special Conditions | 722.179(A)(16)(3) | Cables shall have a voltage rating of not less than 450 volts dc. Voltage ratings shall not be marked on the cables. [722.179(A)(16)(3)](https://2023.antflix.net#722.179(A)(16)(3)) | https://2023.antflix.net#722.179(A)(16)(3) |
Chapter 7 Special Conditions | 722.179(A)(16)(4) | Cables shall have a temperature rating of not less than 60°C (140°F). [722.179(A)(16)(4)](https://2023.antflix.net#722.179(A)(16)(4)) | https://2023.antflix.net#722.179(A)(16)(4) |
Chapter 7 Special Conditions | 722.179(A)(16)(5) | Cables shall comply with any requirements provided in the listing of the system. Informational Note: See UL 1400-1, Outline for Fault-Managed Power Distribution Technologies - Part 1: General Requirements, for information on determining applicable requirements for the listing of Class 4 power systems. Excessive cable l... | https://2023.antflix.net#722.179(A)(16)(5) |
Chapter 7 Special Conditions | 722.179(B) | Cables shall be durably marked on the surface in accordance with the following: The AWG size or circular mil area shall be repeated at intervals not exceeding 610 mm (24 in.).All other markings shall be repeated at intervals not exceeding 1.0 m (40 in.).The proper type designation for the type of cable shall be marked ... | https://2023.antflix.net#722.179(B) |
Chapter 7 Special Conditions | 722.179(C) | Cables shall be permitted to be surface marked to indicate special characteristics of the cable materials. Informational Note No. 1: Examples of these characteristics include, but are not limited to, limited smoke, halogen free, low smoke and halogen free, and sunlight resistant. Informational Note No. 2: Some examples... | https://2023.antflix.net#722.179(C) |
Chapter 7 Special Conditions | 724.1 | This article covers Class 1 circuits, including power-limited Class 1 remote-control and signaling circuits, that are not an integral part of a device or utilization equipment. Informational Note: See 300.26 for classifications of remote-control and signaling circuits. [724.1](https://2023.antflix.net#724.1) | https://2023.antflix.net#724.1 |
Chapter 7 Special Conditions | 724.3 | In addition to the requirements of this article, circuits and equipment shall comply with 724.3(A) through (J). [724.3](https://2023.antflix.net#724.3) | https://2023.antflix.net#724.3 |
Chapter 7 Special Conditions | 724.3(A) | The number and size of conductors shall comply with 300.17. [724.3(A)](https://2023.antflix.net#724.3(A)) | https://2023.antflix.net#724.3(A) |
Chapter 7 Special Conditions | 724.3(B) | Installation of Class 1 circuits shall comply with 300.21. [724.3(B)](https://2023.antflix.net#724.3(B)) | https://2023.antflix.net#724.3(B) |
Chapter 7 Special Conditions | 724.3(C) | Class 1 circuits installed in ducts, plenums, and other spaces used for environmental air shall comply with 300.22. [724.3(C)](https://2023.antflix.net#724.3(C)) | https://2023.antflix.net#724.3(C) |
Chapter 7 Special Conditions | 724.3(D) | Class 1 circuits shall not be installed in any hazardous (classified) locations except as permitted by other articles of this Code. [724.3(D)](https://2023.antflix.net#724.3(D)) | https://2023.antflix.net#724.3(D) |
Chapter 7 Special Conditions | 724.3(E) | Cable tray installations shall comply with Parts I and II of Article 392. [724.3(E)](https://2023.antflix.net#724.3(E)) | https://2023.antflix.net#724.3(E) |
Chapter 7 Special Conditions | 724.3(F) | Installation of raceways shall comply with 300.7 (A). [724.3(F)](https://2023.antflix.net#724.3(F)) | https://2023.antflix.net#724.3(F) |
Chapter 7 Special Conditions | 724.3(G) | Vertical installations of circuit integrity (CI) cables and conductors installed in a raceway or conductors and cables of electrical circuit protective systems shall comply with 300.19. [724.3(G)](https://2023.antflix.net#724.3(G)) | https://2023.antflix.net#724.3(G) |
Chapter 7 Special Conditions | 724.3(H) | Bushings shall be installed where cables emerge from raceways used for mechanical support or protection in accordance with 300.15(C). [724.3(H)](https://2023.antflix.net#724.3(H)) | https://2023.antflix.net#724.3(H) |
Chapter 7 Special Conditions | 724.3(I) | Installation of conductors with other systems shall comply with 300.8. [724.3(I)](https://2023.antflix.net#724.3(I)) | https://2023.antflix.net#724.3(I) |
Chapter 7 Special Conditions | 724.3(J) | Equipment grounding conductors shall be identified in accordance with 250.119. [724.3(J)](https://2023.antflix.net#724.3(J)) | https://2023.antflix.net#724.3(J) |
Chapter 7 Special Conditions | 724.21 | Access to electrical equipment shall not be denied by an accumulation of wires and cables preventing the removal of panels, including suspended ceiling panels. [724.21](https://2023.antflix.net#724.21) | https://2023.antflix.net#724.21 |
Chapter 7 Special Conditions | 724.24 | Class 1 circuits shall be installed in a neat and workmanlike manner. Cables and conductors installed exposed on the surfaces of ceilings and sidewalls shall be supported by the building structure such that the cable will not be damaged by normal building use. Such cables shall be supported by straps, staples, hangers,... | https://2023.antflix.net#724.24 |
Chapter 7 Special Conditions | 724.30 | Class 1 circuits shall be identified at terminal and junction locations in a manner that prevents unintentional interference with other circuits during testing and servicing. [724.30](https://2023.antflix.net#724.30) | https://2023.antflix.net#724.30 |
Chapter 7 Special Conditions | 724.31 | If controlling safety-control equipment, Class 1 circuits shall be provided with physical protection if the failure of such equipment to operate introduces a direct fire or life hazard. All conductors of such circuits shall be installed in rigid metal conduit, intermediate metal conduit, rigid nonmetallic conduit, elec... | https://2023.antflix.net#724.31 |
Chapter 7 Special Conditions | 724.40 | Class 1 circuits shall be supplied from a source with a rated output of not more than 30 volts and 1000 volt-amperes. [724.40](https://2023.antflix.net#724.40) | https://2023.antflix.net#724.40 |
Chapter 7 Special Conditions | 724.40(A) | Transformers shall be permitted to supply Class 1 circuits. Informational Note: See Parts I and II of Article 450 for information on transformers used to supply a Class 1 circuit. [724.40(A)](https://2023.antflix.net#724.40(A)) | https://2023.antflix.net#724.40(A) |
Chapter 7 Special Conditions | 724.40(B) | Power sources other than transformers shall be protected by overcurrent devices rated at not more than 167 percent of the volt-ampere rating of the source divided by the rated voltage. The overcurrent devices shall not be interchangeable with overcurrent devices of higher ratings. The overcurrent device shall be permit... | https://2023.antflix.net#724.40(B) |
Chapter 7 Special Conditions | 724.43 | Overcurrent protection for conductors 14 AWG and larger shall be provided in accordance with the conductor ampacity, without applying the ampacity adjustment and correction factors specified in 310.15 to the ampacity calculation. Overcurrent protection shall not exceed 7 amperes for 18 AWG conductors and 10 amperes for... | https://2023.antflix.net#724.43 |
Chapter 7 Special Conditions | 724.45 | Overcurrent devices shall be located as specified in 724.45(A) through (E). [724.45](https://2023.antflix.net#724.45) | https://2023.antflix.net#724.45 |
Chapter 7 Special Conditions | 724.45(A) | Overcurrent devices shall be located at the point where the conductor to be protected receives its supply. [724.45(A)](https://2023.antflix.net#724.45(A)) | https://2023.antflix.net#724.45(A) |
Chapter 7 Special Conditions | 724.45(B) | Class 1 circuit conductors shall be permitted to be tapped, without overcurrent protection at the tap, where the overcurrent device protecting the circuit conductor is sized to protect the tap conductor. [724.45(B)](https://2023.antflix.net#724.45(B)) | https://2023.antflix.net#724.45(B) |
Chapter 7 Special Conditions | 724.45(C) | Class 1 circuit conductors 14 AWG and larger that are tapped from the load side of the overcurrent protective device(s) of a controlled light and power circuit shall require only short-circuit and ground-fault protection and shall be permitted to be protected by the branch-circuit overcurrent protective device(s) where... | https://2023.antflix.net#724.45(C) |
Chapter 7 Special Conditions | 724.45(D) | Class 1 circuit conductors supplied by the secondary of a single-phase transformer having only a 2-wire (single-voltage) secondary shall be permitted to be protected by overcurrent protection provided on the primary side of the transformer if the protection is in accordance with 450.3 and does not exceed the value dete... | https://2023.antflix.net#724.45(D) |
Chapter 7 Special Conditions | 724.45(E) | Class 1 circuit conductors supplied by the output of a single-phase, listed electronic power source other than a transformer having only a 2-wire (single-voltage) output for connection to Class 1 circuits shall be permitted to be protected by overcurrent protection provided on the input side of the electronic power sou... | https://2023.antflix.net#724.45(E) |
Chapter 7 Special Conditions | 724.46 | Class 1 circuits shall be installed in accordance with 300.2 through 300.26. Exception No. 1: The requirements of 724.48 through 724.51 shall be permitted to apply in installations of Class 1 circuits. Exception No. 2: Methods permitted or required by other articles of this Code shall apply to installations of Class 1 ... | https://2023.antflix.net#724.46 |
Chapter 7 Special Conditions | 724.48 | Class 1 circuits shall be permitted to be installed with other circuits as specified in 724.48(A) and (B). [724.48](https://2023.antflix.net#724.48) | https://2023.antflix.net#724.48 |
Chapter 7 Special Conditions | 724.48(A) | Class 1 circuits shall be permitted to occupy the same cable, cable tray, enclosure, or raceway regardless of whether the individual circuits are alternating current or direct current if all conductors are insulated for the maximum voltage of any conductor in the cable, cable tray, enclosure, or raceway. [724.48(A)](ht... | https://2023.antflix.net#724.48(A) |
Chapter 7 Special Conditions | 724.48(B) | Class 1 circuits shall be permitted to be installed with power-supply conductors as specified in 724.48(B)(1) through (B)(4). [724.48(B)](https://2023.antflix.net#724.48(B)) | https://2023.antflix.net#724.48(B) |
Chapter 7 Special Conditions | 724.48(B)(1) | Class 1 circuits and power-supply circuits shall be permitted to occupy the same cable, enclosure, or raceway without a barrier only where the equipment powered is functionally associated. Class 1 circuits shall be permitted to be installed together with the conductors of electric light, power, non-power-limited fire a... | https://2023.antflix.net#724.48(B)(1) |
Chapter 7 Special Conditions | 724.48(B)(2) | Class 1 circuits and power-supply circuits shall be permitted to be installed in factory- or field-assembled control centers. [724.48(B)(2)](https://2023.antflix.net#724.48(B)(2)) | https://2023.antflix.net#724.48(B)(2) |
Chapter 7 Special Conditions | 724.48(B)(3) | Class 1 circuits and power-supply circuits shall be permitted to be installed as underground conductors in manholes in accordance with one of the following: The power-supply or Class 1 circuit conductors are in metal-enclosed cable or Type UF cable.The conductors are permanently separated from power-supply conductors b... | https://2023.antflix.net#724.48(B)(3) |
Chapter 7 Special Conditions | 724.48(B)(4) | Installations in cable trays shall comply with the requirements of one of the following: Class 1 circuit conductors and power-supply conductors not functionally associated with the Class 1 circuit conductors shall be separated by a solid fixed barrier of a material compatible with the cable tray.Class 1 circuit conduct... | https://2023.antflix.net#724.48(B)(4) |
Chapter 7 Special Conditions | 724.49(A) | Conductors that are 18 AWG and 16 AWG shall be permitted to be used if they supply loads that do not exceed the ampacities specified in 402.5 and are installed in a raceway, an approved enclosure, or a listed cable. Conductors larger than 16 AWG shall not supply loads greater than the ampacities specified in 310.14. Fl... | https://2023.antflix.net#724.49(A) |
Chapter 7 Special Conditions | 724.49(B) | Insulation on conductors shall be rated for the system voltage and not less than 600 volts. Conductors larger than 16 AWG shall comply with the requirements of Article 310. Conductors that are 18 AWG and 16 AWG shall be Type FFH-2, Type KF-2, Type KFF-2, Type PAF, Type PAFF, Type PF, Type PFF, Type PGF, Type PGFF, Type... | https://2023.antflix.net#724.49(B) |
Chapter 7 Special Conditions | 724.51(A) | Where only Class 1 circuit conductors are in a raceway, the number of conductors shall be determined in accordance with 300.17. The ampacity adjustment factors specified in 310.15(C)(1) shall apply only if such conductors carry continuous loads in excess of 10 percent of the ampacity of each conductor. [724.51(A)](http... | https://2023.antflix.net#724.51(A) |
Chapter 7 Special Conditions | 724.51(B) | Where power-supply conductors and Class 1 circuit conductors are permitted in a raceway in accordance with 724.48, the number of conductors shall be determined in accordance with 300.17. The ampacity adjustment factors specified in 310.15(C)(1) shall apply as follows: To all conductors where the Class 1 circuit conduct... | https://2023.antflix.net#724.51(B) |
Chapter 7 Special Conditions | 724.51(C) | Where Class 1 circuit conductors are installed in cable trays, they shall comply with the requirements of 392.22 and 392.80(A). [724.51(C)](https://2023.antflix.net#724.51(C)) | https://2023.antflix.net#724.51(C) |
Chapter 7 Special Conditions | 724.52 | Class 1 circuits that extend aerially beyond one building shall also meet the requirements of Part I of Article 225. [724.52](https://2023.antflix.net#724.52) | https://2023.antflix.net#724.52 |
Chapter 7 Special Conditions | 725.1 | This article covers power-limited circuits, including power-limited remote-control and signaling circuits, that are not an integral part of a device or of utilization equipment. Informational Note No. 1: The circuits described herein are characterized by usage and electrical power limitations that differentiate them fr... | https://2023.antflix.net#725.1 |
Chapter 7 Special Conditions | 725.3 | In addition to the requirements of this article, circuits and equipment shall comply with the articles or sections listed in 725.3(A) through (E). Only those sections of Article 300 referenced in this article shall apply to Class 2 and Class 3 circuits. [725.3](https://2023.antflix.net#725.3) | https://2023.antflix.net#725.3 |
Chapter 7 Special Conditions | 725.3(A) | Installation of Class 2 and Class 3 circuits shall comply with 300.21. [725.3(A)](https://2023.antflix.net#725.3(A)) | https://2023.antflix.net#725.3(A) |
Chapter 7 Special Conditions | 725.3(B) | Class 2 and Class 3 circuits installed in ducts, plenums, or other space used for environmental air shall comply with 300.22. [725.3(B)](https://2023.antflix.net#725.3(B)) | https://2023.antflix.net#725.3(B) |
Chapter 7 Special Conditions | 725.3(C) | Motor control circuits tapped from the load side of the motor branch-circuit protective device(s) as specified in 430.72(A) shall comply with Part IV of Article 430. [725.3(C)](https://2023.antflix.net#725.3(C)) | https://2023.antflix.net#725.3(C) |
Chapter 7 Special Conditions | 725.3(D) | Equipment grounding conductors shall be identified in accordance with 250.119. [725.3(D)](https://2023.antflix.net#725.3(D)) | https://2023.antflix.net#725.3(D) |
Chapter 7 Special Conditions | 725.3(E) | The listing and installation of cables for Class 2 and Class 3 circuits shall comply with Part I and Part II of Article 722. [725.3(E)](https://2023.antflix.net#725.3(E)) | https://2023.antflix.net#725.3(E) |
Chapter 7 Special Conditions | 725.10 | Cables and equipment shall be permitted to be used in hazardous (classified) locations where specifically permitted by other articles in this Code. [725.10](https://2023.antflix.net#725.10) | https://2023.antflix.net#725.10 |
Chapter 7 Special Conditions | 725.21 | Access to electrical equipment shall not be denied by an accumulation of wires and cables that prevents removal of panels, including suspended ceiling panels. [725.21](https://2023.antflix.net#725.21) | https://2023.antflix.net#725.21 |
Chapter 7 Special Conditions | 725.24 | Class 2 and Class 3 equipment shall be installed in a neat and workmanlike manner. The installation shall also comply with 300.4 and 300.11. [725.24](https://2023.antflix.net#725.24) | https://2023.antflix.net#725.24 |
Chapter 7 Special Conditions | 725.30 | Class 2 and Class 3 circuits shall be identified at terminal and junction locations in a manner that prevents unintentional interference with other circuits during testing and servicing. [725.30](https://2023.antflix.net#725.30) | https://2023.antflix.net#725.30 |
Chapter 7 Special Conditions | 725.31 | Where damage to power-limited circuits can result in a failure of safety-control equipment that would introduce a direct fire or life hazard, the power-limited circuits shall be installed in accordance with 724.31. Room thermostats, water temperature regulating devices, and similar controls used in conjunction with ele... | https://2023.antflix.net#725.31 |
Chapter 7 Special Conditions | 725.60(A) | The power source for a Class 2 or a Class 3 circuit shall be as follows: Informational Note No. 1: Informational Note Figure 725.60 illustrates the relationships between Class 2 or Class 3 power sources, their supply, and the Class 2 or Class 3 circuits.Informational Note No. 2: See Chapter 9, Table 11(A) and Table 11(... | https://2023.antflix.net#725.60(A) |
Chapter 7 Special Conditions | 725.60(B) | Class 2 or Class 3 power sources shall not have the output connections paralleled or otherwise interconnected unless listed for such interconnection. [725.60(B)](https://2023.antflix.net#725.60(B)) | https://2023.antflix.net#725.60(B) |
Chapter 7 Special Conditions | 725.60(C) | The equipment supplying the circuits shall be durably marked where plainly visible to indicate each circuit that is a Class 2 or Class 3 circuit. The power sources for limited power circuits in 725.60(A)(3), limited power circuits for listed audio/video equipment, listed information technology equipment, listed communi... | https://2023.antflix.net#725.60(C) |
Chapter 7 Special Conditions | 725.127 | Conductors and equipment on the supply side of the power source shall be installed in accordance with the appropriate requirements of Chapters 1 through 4. Exception: The input leads of a transformer or other power source supplying Class 2 and Class 3 circuits shall be permitted to be smaller than 14 AWG but not smalle... | https://2023.antflix.net#725.127 |
Chapter 7 Special Conditions | 725.130 | Class 2 and Class 3 circuits on the load side of the power source shall be permitted to be installed using wiring methods and materials in accordance with 725.130(A), (B), or a combination of both. Parts I and II of Article 722 shall apply. [725.130](https://2023.antflix.net#725.130) | https://2023.antflix.net#725.130 |
Chapter 7 Special Conditions | 725.130(A) | Use of Class 1 wiring methods for Class 2 and Class 3 circuits shall be permitted. Separation from electric light, power, Class 1, non-power-limited fire alarm circuit conductors, and medium-power network-powered broadband communications cables shall comply with 725.136. Exception: The ampacity adjustment factors given... | https://2023.antflix.net#725.130(A) |
Chapter 7 Special Conditions | 725.130(B) | Conductors on the load side of the power source shall be insulated in accordance with 722.179 and be installed in accordance with 722.135 and 725.136 through 725.144. Exception No. 1: As provided for in 620.21 for elevators and similar equipment. Exception No. 2: Other wiring methods and materials installed in accordan... | https://2023.antflix.net#725.130(B) |
Chapter 7 Special Conditions | 725.136(A) | Cables and conductors of Class 2 and Class 3 circuits shall not be placed in any cable, cable tray, compartment, enclosure, manhole, outlet box, device box, raceway, or similar fitting with conductors of electric light, power, Class 1, non—power-limited fire alarm circuits, and medium-power network-powered broadband co... | https://2023.antflix.net#725.136(A) |
Chapter 7 Special Conditions | 725.136(B) | Class 2 and Class 3 circuits shall be permitted to be installed together with the conductors of electric light, power, Class 1, non—power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are separated by a barrier. [725.136(B)](https://2023.antflix.net#725.136(B)) | https://2023.antflix.net#725.136(B) |
Chapter 7 Special Conditions | 725.136(C) | In enclosures, Class 2 and Class 3 circuits shall be permitted to be installed in a raceway to separate them from Class 1, non—power-limited fire alarm, and medium-power network-powered broadband communications circuits. [725.136(C)](https://2023.antflix.net#725.136(C)) | https://2023.antflix.net#725.136(C) |
Chapter 7 Special Conditions | 725.136(D) | Class 2 and Class 3 circuit conductors in compartments, enclosures, device boxes, outlet boxes, or similar fittings shall be permitted to be installed with electric light, power, Class 1, non—power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are introduced solely to... | https://2023.antflix.net#725.136(D) |
Chapter 7 Special Conditions | 725.136(E) | Class 2 and Class 3 circuit conductors entering compartments, enclosures, device boxes, outlet boxes, or similar fittings shall be permitted to be installed with Class 1, non—power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are introduced solely to connect the equi... | https://2023.antflix.net#725.136(E) |
Chapter 7 Special Conditions | 725.136(F) | Underground Class 2 and Class 3 circuit conductors in a manhole shall be permitted to be installed with Class 1, non—power-limited fire alarm, and medium-power network-powered broadband communications circuits where one of the following conditions is met: The electric light, power, Class 1, non—power-limited fire alarm... | https://2023.antflix.net#725.136(F) |
Chapter 7 Special Conditions | 725.136(G) | Class 2 and Class 3 circuit conductors shall be permitted to be installed in cable trays where the conductors of the electric light, Class 1, and non—power-limited fire alarm circuits are separated by a solid fixed barrier of a material compatible with the cable tray or where the Class 2 or Class 3 circuits are install... | https://2023.antflix.net#725.136(G) |
Chapter 7 Special Conditions | 725.136(H) | Class 2 and Class 3 circuits shall be permitted to be installed together with the conductors of electric light, power, Class 1, non—power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are installed using Class 1 wiring methods in accordance with 724.46 and where they ... | https://2023.antflix.net#725.136(H) |
Chapter 7 Special Conditions | 725.136(I) | For other applications, conductors of Class 2 and Class 3 circuits shall be separated by at least 50 mm (2 in.) from conductors of any electric light, power, Class 1, non—power-limited fire alarm, or medium-power network-powered broadband communications circuits unless one of the following conditions is met: Either all... | https://2023.antflix.net#725.136(I) |
Chapter 7 Special Conditions | 725.139(A) | Conductors of two or more Class 2 circuits shall be permitted within the same cable, enclosure, raceway, or cable routing assembly. [725.139(A)](https://2023.antflix.net#725.139(A)) | https://2023.antflix.net#725.139(A) |
Chapter 7 Special Conditions | 725.139(B) | Conductors of two or more Class 3 circuits shall be permitted within the same cable, enclosure, raceway, or cable routing assembly. [725.139(B)](https://2023.antflix.net#725.139(B)) | https://2023.antflix.net#725.139(B) |
Chapter 7 Special Conditions | 725.139(C) | Conductors of one or more Class 2 circuits shall be permitted within the same cable, enclosure, raceway, or cable routing assembly with conductors of Class 3 circuits if the insulation of the Class 2 circuit conductors in the cable, enclosure, raceway, or cable routing assembly is at least that required for Class 3 cir... | https://2023.antflix.net#725.139(C) |
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