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Chapter 7 Special Conditions | 760.51(B) | Where power-supply conductors and non—power-limited fire alarm circuit conductors are permitted in a raceway in accordance with 760.48, the number of conductors shall be determined in accordance with 300.17. The ampacity adjustment factors given in 310.15(C)(1) shall apply as follows: To all conductors where the fire alarm circuit conductors carry continuous loads in excess of 10 percent of the ampacity of each conductor and where the total number of conductors is more than threeTo the power-supply conductors only, where the fire alarm circuit conductors do not carry continuous loads in excess of 10 percent of the ampacity of each conductor and where the number of power-supply conductors is more than three [760.51(B)](https://2023.antflix.net#760.51(B)) | https://2023.antflix.net#760.51(B) |
Chapter 7 Special Conditions | 760.51(C) | Where fire alarm circuit conductors are installed in cable trays, they shall comply with 392.22 and 392.80(A). [760.51(C)](https://2023.antflix.net#760.51(C)) | https://2023.antflix.net#760.51(C) |
Chapter 7 Special Conditions | 760.53 | Multiconductor non-power-limited fire alarm cables that meet the requirements of 760.176 shall be permitted to be used on fire alarm circuits operating at 150 volts or less and shall be installed in accordance with 760.53(A) and (B). [760.53](https://2023.antflix.net#760.53) | https://2023.antflix.net#760.53 |
Chapter 7 Special Conditions | 760.53(A) | Multiconductor non-power-limited fire alarm circuit cables shall be installed in accordance with 760.53(A)(1), (A)(2), and (A)(3). [760.53(A)](https://2023.antflix.net#760.53(A)) | https://2023.antflix.net#760.53(A) |
Chapter 7 Special Conditions | 760.53(A)(1) | Cable splices or terminations shall be made in listed fittings, boxes, enclosures, fire alarm devices, or utilization equipment. Where installed exposed, cables shall be adequately supported and installed in such a way that maximum protection against physical damage is afforded by building construction such as baseboards, door frames, ledges, and so forth. Where located within 2.1 m (7 ft) of the floor, cables shall be securely fastened in an approved manner at intervals of not more than 450 mm (18 in.). [760.53(A)(1)](https://2023.antflix.net#760.53(A)(1)) | https://2023.antflix.net#760.53(A)(1) |
Chapter 7 Special Conditions | 760.53(A)(2) | Cables shall be installed in metal raceway or rigid nonmetallic conduit where passing through a floor or wall to a height of 2.1 m (7 ft) above the floor, unless adequate protection can be afforded by building construction such as detailed in 760.53(A)(1), or unless an equivalent solid guard is provided. [760.53(A)(2)](https://2023.antflix.net#760.53(A)(2)) | https://2023.antflix.net#760.53(A)(2) |
Chapter 7 Special Conditions | 760.53(A)(3) | Cables shall be installed in rigid metal conduit, rigid nonmetallic conduit, intermediate metal conduit, liquidtight flexible nonmetallic conduit, or electrical metallic tubing where installed in hoistways. Exception: As provided for in 620.21 for elevators and similar equipment. [760.53(A)(3)](https://2023.antflix.net#760.53(A)(3)) | https://2023.antflix.net#760.53(A)(3) |
Chapter 7 Special Conditions | 760.53(B) | The use of non-power-limited fire alarm circuit cables shall comply with 760.53(B)(1) through (B)(4). [760.53(B)](https://2023.antflix.net#760.53(B)) | https://2023.antflix.net#760.53(B) |
Chapter 7 Special Conditions | 760.53(B)(1) | Multiconductor non—power-limited fire alarm circuit cables, Types NPLFP, NPLFR, and NPLF, shall not be installed exposed in ducts specifically fabricated for environmental air. Informational Note: See 300.22(B). [760.53(B)(1)](https://2023.antflix.net#760.53(B)(1)) | https://2023.antflix.net#760.53(B)(1) |
Chapter 7 Special Conditions | 760.53(B)(2) | Cables installed in other spaces used for environmental air shall be Type NPLFP. Exception No. 1: Types NPLFR and NPLF cables installed in compliance with 300.22( C). Exception No. 2: Other wiring methods in accordance with 300.22(C) and conductors in compliance with 760.49(C). Exception No. 3: Type NPLFP-CI cable shall be permitted to be installed to provide a 2-hour circuit integrity rated cable. [760.53(B)(2)](https://2023.antflix.net#760.53(B)(2)) | https://2023.antflix.net#760.53(B)(2) |
Chapter 7 Special Conditions | 760.53(B)(3) | Cables installed in vertical runs and penetrating one or more floors, or cables installed in vertical runs in a shaft, shall be Type NPLFR. Floor penetrations requiring Type NPLFR shall contain only cables suitable for riser or plenum use. Exception No. 1: Type NPLF or other cables that are specified in Chapter 3 and are in compliance with 760.49(C) and encased in metal raceway. Exception No. 2: Type NPLF cables located in a fireproof shaft having firestops at each floor. Informational Note: See 300.21 for firestop requirements for floor penetrations. Exception No. 3: Type NPLF-CI cable shall be permitted to be installed to provide a 2-hour circuit integrity rated cable. [760.53(B)(3)](https://2023.antflix.net#760.53(B)(3)) | https://2023.antflix.net#760.53(B)(3) |
Chapter 7 Special Conditions | 760.53(B)(4) | Cables installed in building locations other than the locations covered in 760.53(B)(1), (B)(2), and (B)(3) shall be Type NPLF. Exception No. 1: Chapter 3 wiring methods with conductors in compliance with 760.49(C). Exception No. 2: Type NPLFP or Type NPLFR cables shall be permitted. Exception No. 3: Type NPLFR-CI cable shall be permitted to be installed to provide a 2-hour circuit integrity rated cable. [760.53(B)(4)](https://2023.antflix.net#760.53(B)(4)) | https://2023.antflix.net#760.53(B)(4) |
Chapter 7 Special Conditions | 760.121(A) | The power source for a power-limited fire alarm circuit shall be as specified in the following: Informational Note No. 1: See Chapter 9, Tables 12(A) and 12(B), for the listing requirements for power-limited fire alarm circuit sources.A listed PLFA or Class 3 transformerA listed PLFA or Class 3 power supplyListed equipment marked to identify the PLFA power sourceInformational Note No. 2: Examples of listed equipment are a fire alarm control panel with integral power source; a circuit card listed for use as a PLFA source, where used as part of a listed assembly; a current-limiting impedance, listed for the purpose or part of a listed product, used in conjunction with a non—power-limited transformer or a stored energy source, for example, storage battery, to limit the output current. [760.121(A)](https://2023.antflix.net#760.121(A)) | https://2023.antflix.net#760.121(A) |
Chapter 7 Special Conditions | 760.121(B) | The branch circuit supplying the fire alarm equipment(s) shall comply with the following requirements: The branch circuit shall supply no other loads.The branch circuit shall not be supplied through ground-fault circuit interrupters or arc-fault circuit interrupters.The location of the branch-circuit overcurrent protective device shall be permanently identified at the fire alarm control unit.The circuit disconnecting means shall have red identification, shall be accessible only to qualified personnel, and shall be identified with the following words: "FIRE ALARM CIRCUIT." The red identification shall not damage the overcurrent protective devices or obscure the manufacturer's markings.The fire alarm branch-circuit disconnecting means shall be permitted to be secured in the "on" position.Informational Note: See 210.8(A)(5), Exception, for requirements on receptacles in dwelling-unit unfinished basements that supply power for fire alarm systems. [760.121(B)](https://2023.antflix.net#760.121(B)) | https://2023.antflix.net#760.121(B) |
Chapter 7 Special Conditions | 760.124 | The equipment supplying PLFA circuits shall be durably marked where plainly visible to indicate each circuit that is a power-limited fire alarm circuit. [760.124](https://2023.antflix.net#760.124) | https://2023.antflix.net#760.124 |
Chapter 7 Special Conditions | 760.127 | Conductors and equipment on the supply side of the power source shall be installed in accordance with the appropriate requirements of Part II and Chapters 1 through 4. Transformers or other devices supplied from power-supply conductors shall be protected by an overcurrent device rated not over 20 amperes. Exception: The input leads of a transformer or other power source supplying power-limited fire alarm circuits shall be permitted to be smaller than 14 AWG, but not smaller than 18 AWG, if they are not over 300 mm (12 in.) long and if they have insulation that complies with 760.49(B). [760.127](https://2023.antflix.net#760.127) | https://2023.antflix.net#760.127 |
Chapter 7 Special Conditions | 760.130 | Fire alarm circuits on the load side of the power source shall be permitted to be installed using wiring methods and materials in accordance with 760.130(A), (B), or a combination of both. Parts I and II of Article 722 shall apply. [760.130](https://2023.antflix.net#760.130) | https://2023.antflix.net#760.130 |
Chapter 7 Special Conditions | 760.130(A) | NPLFA wiring methods shall be permitted when used in accordance with 760.46, 760.49, or 760.53 for PLFA circuits. Conductors shall be solid or stranded copper. 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 760.136. Exception: The ampacity adjustment factors specified in 310.15(C)(1) shall not apply. [760.130(A)](https://2023.antflix.net#760.130(A)) | https://2023.antflix.net#760.130(A) |
Chapter 7 Special Conditions | 760.130(B) | Power-limited fire alarm conductors and cables described in 722.179 shall be installed as detailed in 722.135 and 760.130(B)(1) through (B)(4). Devices shall be installed in accordance with 110.3(B), 300.1 1(A), and 300.15. [760.130(B)](https://2023.antflix.net#760.130(B)) | https://2023.antflix.net#760.130(B) |
Chapter 7 Special Conditions | 760.130(B)(1) | Cable splices or terminations shall be made in listed fittings, boxes, enclosures, fire alarm devices, or utilization equipment. Where installed exposed, cables shall be adequately supported and installed such that maximum protection against physical damage is afforded by building construction such as baseboards, door frames, ledges, and so forth. Where located within 2.1 m (7 ft) of the floor, cables shall be securely fastened in an approved manner at intervals of not more than 450 mm (18 in.). [760.130(B)(1)](https://2023.antflix.net#760.130(B)(1)) | https://2023.antflix.net#760.130(B)(1) |
Chapter 7 Special Conditions | 760.130(B)(2) | Cables shall be installed in metal raceways or rigid nonmetallic conduit where passing through a floor or wall to a height of 2.1 m (7 ft) above the floor, unless adequate protection can be afforded by building construction such as detailed in 760.130(B)(1) or unless an equivalent solid guard is provided. [760.130(B)(2)](https://2023.antflix.net#760.130(B)(2)) | https://2023.antflix.net#760.130(B)(2) |
Chapter 7 Special Conditions | 760.130(B)(3) | Cables specified in Chapter 3 and meeting the requirements of 722.179(A)(15)(a) and (A)(15) (b) shall be permitted to be installed in nonconcealed spaces where the exposed length of cable does not exceed 3 m (10 ft). [760.130(B)(3)](https://2023.antflix.net#760.130(B)(3)) | https://2023.antflix.net#760.130(B)(3) |
Chapter 7 Special Conditions | 760.130(B)(4) | A portable fire alarm system provided to protect a stage or set when not in use shall be permitted to use wiring methods in accordance with 530.12. [760.130(B)(4)](https://2023.antflix.net#760.130(B)(4)) | https://2023.antflix.net#760.130(B)(4) |
Chapter 7 Special Conditions | 760.133 | Conductors and equipment for power-limited fire alarm circuits shall be installed in accordance with Parts I and II of Article 722 and 760.136 through 760.143. [760.133](https://2023.antflix.net#760.133) | https://2023.antflix.net#760.133 |
Chapter 7 Special Conditions | 760.136(A) | Power-limited fire alarm circuit cables and conductors 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 communications circuits unless permitted by 760.136(B) through (G). [760.136(A)](https://2023.antflix.net#760.136(A)) | https://2023.antflix.net#760.136(A) |
Chapter 7 Special Conditions | 760.136(B) | Power-limited fire alarm circuit cables shall be permitted to be installed together with Class 1, non—power-limited fire alarm, and medium-power network-powered broadband communications circuits where they are separated by a barrier. [760.136(B)](https://2023.antflix.net#760.136(B)) | https://2023.antflix.net#760.136(B) |
Chapter 7 Special Conditions | 760.136(C) | In enclosures, power-limited fire alarm circuits shall be permitted to be installed in a raceway within the enclosure to separate them from Class 1, non—power-limited fire alarm, and medium-power network-powered broadband communications circuits. [760.136(C)](https://2023.antflix.net#760.136(C)) | https://2023.antflix.net#760.136(C) |
Chapter 7 Special Conditions | 760.136(D) | Power-limited fire alarm 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 connect the equipment connected to power-limited fire alarm circuits, and shall comply with either of the following conditions: The electric light, power, Class 1, non—power-limited fire alarm, and medium-power network-powered broadband communications circuit conductors are routed to maintain a minimum of 6 mm (1/4 in.) separation from the conductors and cables of power-limited fire alarm circuits.The circuit conductors operate at 150 volts or less to ground and also comply with one of the following conditions:The fire alarm power-limited circuits are installed using Type FPL. Type FPLR, Type FPLP, or permitted substitute cables if these power-limited cable conductors extending beyond the jacket are separated by a minimum of 6 mm (1/4 in.) or by a nonconductive sleeve or nonconductive barrier from all other conductors.The power-limited fire alarm circuit conductors are installed as non—power-limited circuits in accordance with 760.46. [760.136(D)](https://2023.antflix.net#760.136(D)) | https://2023.antflix.net#760.136(D) |
Chapter 7 Special Conditions | 760.136(E) | Power-limited fire alarm circuit conductors entering 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 connect the equipment connected to power-limited fire alarm circuits or to other circuits controlled by the fire alarm system to which the other conductors in the enclosure are connected. Where power-limited fire alarm circuit conductors must enter an enclosure that is provided with a single opening, they shall be permitted to enter through a single fitting (such as a tee), provided the conductors are separated from the conductors of the other circuits by a continuous and firmly fixed nonconductor, such as flexible tubing. [760.136(E)](https://2023.antflix.net#760.136(E)) | https://2023.antflix.net#760.136(E) |
Chapter 7 Special Conditions | 760.136(F) | In hoistways, power-limited fire alarm circuit conductors shall be installed in rigid metal conduit, rigid nonmetallic conduit, intermediate metal conduit, liquidtight flexible nonmetallic conduit, or electrical metallic tubing. For elevators or similar equipment, these conductors shall be permitted to be installed as provided in 620.21. [760.136(F)](https://2023.antflix.net#760.136(F)) | https://2023.antflix.net#760.136(F) |
Chapter 7 Special Conditions | 760.136(G) | PLFA 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 NPFLA wiring methods and materials in accordance with Part II of Article 760 and are protected by an approved method. [760.136(G)](https://2023.antflix.net#760.136(G)) | https://2023.antflix.net#760.136(G) |
Chapter 7 Special Conditions | 760.136(H) | For other applications, power-limited fire alarm circuit conductors 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 (a) all of the electric light, power, Class 1. non—power-limited fire alarm, and medium-power network-powered broadband communications circuit conductors or (b) all of the power-limited fire alarm circuit conductors are in a raceway or in metal-sheathed, metal-clad, nonmetallic-sheathed, or Type UF cables.All of the electric light, power, Class 1, non—power-limited fire alarm, and medium-power network-powered broadband communications circuit conductors are permanently separated from all of the power-limited fire alarm circuit conductors by a continuous and firmly fixed nonconductor, such as porcelain tubes or flexible tubing, in addition to the insulation on the conductors. [760.136(H)](https://2023.antflix.net#760.136(H)) | https://2023.antflix.net#760.136(H) |
Chapter 7 Special Conditions | 760.139(A) | (Cable and conductors of two or more power-limited fire alarm circuits shall be permitted within the same cable, enclosure, cable tray, raceway, or cable routing assembly. [760.139(A)](https://2023.antflix.net#760.139(A)) | https://2023.antflix.net#760.139(A) |
Chapter 7 Special Conditions | 760.139(B) | Conductors of one or more Class 2 circuits shall be permitted within the same cable, enclosure, cable tray, raceway, or cable routing assembly with conductors of power-limited fire alarm circuits if the insulation of the Class 2 circuit conductors in the cable, enclosure, raceway, or cable routing assembly is at least that required by the power-limited fire alarm circuits. [760.139(B)](https://2023.antflix.net#760.139(B)) | https://2023.antflix.net#760.139(B) |
Chapter 7 Special Conditions | 760.139(C) | Cable and conductors of Class 3 and communications circuits shall be permitted within the same cable, enclosure, cable tray, raceway, or cable routing assembly with cables and conductors of power-limited fire alarm circuits. [760.139(C)](https://2023.antflix.net#760.139(C)) | https://2023.antflix.net#760.139(C) |
Chapter 7 Special Conditions | 760.139(D) | Low-power network-powered broadband communications circuits shall be permitted in the same enclosure, cable tray, raceway, or cable routing assembly with PLFA cables. [760.139(D)](https://2023.antflix.net#760.139(D)) | https://2023.antflix.net#760.139(D) |
Chapter 7 Special Conditions | 760.139(E) | Audio system circuits described in 640.9(C) and installed using Class 2 or Class 3 wiring methods in compliance with 722.135 shall not be installed in the same cable, cable tray, raceway, or cable routing assembly with power-limited conductors or cables. [760.139(E)](https://2023.antflix.net#760.139(E)) | https://2023.antflix.net#760.139(E) |
Chapter 7 Special Conditions | 760.142 | Conductors of 26 AWG shall be permitted only where spliced with a connector listed as suitable for 26 AWG to 24 AWG or larger conductors that are terminated on equipment or where the 26 AWG conductors are terminated on equipment listed as suitable for 26 AWG conductors. Single conductors shall not be smaller than 18 AWG. [760.142](https://2023.antflix.net#760.142) | https://2023.antflix.net#760.142 |
Chapter 7 Special Conditions | 760.143 | Power-limited fire alarm circuit conductors shall not be strapped, taped, or attached by any means to the exterior of any conduit or other raceway as a means of support. [760.143](https://2023.antflix.net#760.143) | https://2023.antflix.net#760.143 |
Chapter 7 Special Conditions | 760.145(A) | Listed continuous line-type fire detectors, including insulated copper tubing of pneumatically operated detectors, employed for both detection and carrying signaling currents shall be permitted to be used in power-limited circuits. [760.145(A)](https://2023.antflix.net#760.145(A)) | https://2023.antflix.net#760.145(A) |
Chapter 7 Special Conditions | 760.145(B) | Continuous line-type fire detectors shall be installed in accordance with 760.124 through 760.130 and 760.133. [760.145(B)](https://2023.antflix.net#760.145(B)) | https://2023.antflix.net#760.145(B) |
Chapter 7 Special Conditions | 760.154 | PLFA cables shall comply with the requirements described in Table 760.154 or where cable substitutions are made as shown in 760.154(A). Where substitute cables are installed, the wiring requirements of Article 760, Parts 1 and III, shall apply. Types FPLP-CI, FPLR-CI, and FPL-CI cables shall be permitted to be installed to provide 2-hour circuit integrity rated cables. [760.154](https://2023.antflix.net#760.154) | https://2023.antflix.net#760.154 |
Chapter 7 Special Conditions | 760.154(A) | The substitutions for fire alarm cables listed in Table 760.154(A) and illustrated in Figure 760.154(A) shall be permitted. Where substitute cables are installed, the wiring requirements of Article 760, Parts I and III, shall apply. Informational Note: See 800.179 for information on communications cables (CMP, CMR, CMG, CM). FIGURE 760.154(A) Cable Substitution Hierarchy. Table 760.154 Applications of Listed PLFA Cables in Buildings Applications Cable Type FPLP & FPLP-CI FPLR & FPLR-CI FPL & FPL-CI In fabricated ducts as described in 300.22(B) In fabricated ducts Y* N N In metal raceway that complies with 300.22(B) Y* Y* Y* In other spaces used for environmental air as described in 300.22(C) In other spaces used for environmental air Y* N N In metal raceway that complies with 300.22(C) Y* Y* Y* In plenum communications raceways Y* N N In plenum cable routing assemblies Y* N N Supported by open metal cable trays Y* N N Supported by solid bottom metal cable trays with solid metal covers Y* Y* Y* In risers In vertical runs Y* Y* N In metal raceways Y* Y* Y* In fireproof shafts Y* Y* Y* In plenum communications raceways Y* Y* N In plenum cable routing assemblies Y* Y* N In riser communications raceways Y* Y* N In riser cable routing assemblies Y* Y* N In one- and two-family dwellings Y* Y* Y* Within buildings in other than air-handling spaces and risers General Y* Y* Y* Supported by cable trays Y* Y* Y* In any raceway recognized in Chapter 3 Y* Y* Y* In plenum communications raceway Y* Y* Y* In plenum cable routing assemblies Y* Y* Y* In riser communications raceways Y* Y* Y* In riser cable routing assemblies Y* Y* Y* In general-purpose communications raceways Y* Y* Y* In general-purpose cable routing assemblies Y* Y* Y* Note: "N" indicates that the cable type shall not be permitted to be installed in the application. "Y*" indicates that the cable type shall be permitted to be installed in the application subject to the limitations described in 760.130 through 760.145. Table 760.154(A) Cable Substitutions Cable Type Permitted Substitutions FPLP CMP FPLR CMP, FPLP, CMR FPL CMP, FPLP, CMR, FPLR, CMG, CM [760.154(A)](https://2023.antflix.net#760.154(A)) | https://2023.antflix.net#760.154(A) |
Chapter 7 Special Conditions | 760.176 | Non-power-limited fire alarm cables installed as wiring within buildings shall be listed in accordance with 760.176(A) and (B), be listed as resistant to the spread of fire in accordance with 760.176(C) through (F), and be marked in accordance with 760.176(G). Cable used in a wet location shall be listed for use in wet locations or have a moisture-impervious metal sheath. Non—power-limited fire alarm cables shall have a temperature rating of not less than 60°C (140°F). Non-power-limited fire alarm cables shall be permitted to contain optical fibers. Informational Note: See UL 1425, Standard for Cables for Non—Power-Limited Fire-Alarm Circuits, for information on non—power-limited fire alarm cables. [760.176](https://2023.antflix.net#760.176) | https://2023.antflix.net#760.176 |
Chapter 7 Special Conditions | 760.176(A) | Conductors shall be 18 AWG or larger solid or stranded copper. [760.176(A)](https://2023.antflix.net#760.176(A)) | https://2023.antflix.net#760.176(A) |
Chapter 7 Special Conditions | 760.176(B) | Insulation on conductors shall be rated for the system voltage and not less than 600 V. Insulated conductors 14 AWG and larger shall be one of the types listed in Table 310.4(1) or one that is identified for such use. Insulated conductors 18 AWG and 16 AWG shall be in accordance with 760.49. [760.176(B)](https://2023.antflix.net#760.176(B)) | https://2023.antflix.net#760.176(B) |
Chapter 7 Special Conditions | 760.176(C) | Type NPLFP non—power-limited fire alarm cable for use in other space used for environmental air shall be listed as being suitable for use in other space used for environmental air as described in 300.22(C) and shall also be listed as having adequate fire-resistant and low smoke-producing characteristics. Informational Note: See NFPA 262, Standard Method of Test for Flame Travel and Smoke of Wires and Cables for Use in Air-Handling Spaces, for one method of defining a cable that is low-smoke producing and fire-resistant if the cable exhibits a maximum peak optical density of 0.50 or less, an average optical density of 0.15 or less, and a maximum flame spread distance of 1.52 m (5 ft) or less when tested. [760.176(C)](https://2023.antflix.net#760.176(C)) | https://2023.antflix.net#760.176(C) |
Chapter 7 Special Conditions | 760.176(D) | Type NPLFR non—power-limited fire alarm riser cable shall be listed as being suitable for use in a vertical run in a shaft or from floor to floor and shall also be listed as having fire-resistant characteristics capable of preventing the carrying of fire from floor to floor. Informational Note: See UL 1666, Test for Flame Propagation Height of Electrical and Optical-Fiber Cables Installed Vertically in Shafts, for one method of defining fire-resistant characteristics capable of preventing the carrying of fire from floor to floor. [760.176(D)](https://2023.antflix.net#760.176(D)) | https://2023.antflix.net#760.176(D) |
Chapter 7 Special Conditions | 760.176(E) | Type NPLF non—power-limited fire alarm cable shall be listed as being suitable for general-purpose fire alarm use, with the exception of use in risers, ducts, plenums, and other space used for environmental air, and shall also be listed as being resistant to the spread of fire. Informational Note: See UL 2556, Wire and Cable Test Methods, for one method of defining resistant to the spread of fire. One method is to demonstrate that the cables do not spread fire to the top of the tray in the "UL Flame Exposure, Vertical Tray Flame Test." The smoke measurements in the test method are not applicable. Another method of defining resistant to the spread of fire is for the damage (char length) not to exceed 1.5 m (4 ft 11 in.) when performing the FT4 "Vertical Flame Test." [760.176(E)](https://2023.antflix.net#760.176(E)) | https://2023.antflix.net#760.176(E) |
Chapter 7 Special Conditions | 760.176(F) | Cables that are used for survivability of critical circuits under fire conditions shall be listed and meet the requirements of 760.176(F)(1), (F)(2), or (F)(3). Informational Note: See NFPA 72, National Fire Alarm and Signaling Code, 12.4.3 and 12.4.4, for additional information on circuit integrity (CI) cable, fire-resistive cable systems, or electrical circuit protective systems used for fire alarm circuits to comply with the survivability requirements to maintain the circuit's electrical function during fire conditions for a defined period of time. [760.176(F)](https://2023.antflix.net#760.176(F)) | https://2023.antflix.net#760.176(F) |
Chapter 7 Special Conditions | 760.176(F)(1) | Circuit integrity (CI) cables specified in 760.176(C), (D), and (E) and used for survivability of critical circuits shall be marked for an additional classification using the suffix "-CI." In order to maintain its listed fire-resistive rating, CI cables shall only be installed in free air in accordance with 760.24(B). CI cables shall only be permitted to be installed in a raceway where specifically listed and marked as part of an electrical circuit protective fire-resistive cable system as covered in 760.176(F)(2). CI cables shall only be permitted to be installed in a raceway where specifically listed and marked as part of an electrical circuit protective system as covered in 760.176(F)(2). Informational Note: See UL 2196, Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables, and UL 1425, Cables for Non-Power-Limited Fire-Alarm Circuits, for information on establishing a rating for CI cable. The UL Guide Information for Nonpower-limited Fire Alarm Circuits (HNHT) contains information for identifying the cable and its installation limitations to maintain the fire-resistive rating. [760.176(F)(1)](https://2023.antflix.net#760.176(F)(1)) | https://2023.antflix.net#760.176(F)(1) |
Chapter 7 Special Conditions | 760.176(F)(2) | Cables specified in 760.176(C), (D), (E), and (F)(1) that are part of a fire-resistive cable system shall be identified with the system identifier and hourly rating marked on the protectant or the smallest unit container and installed in accordance with the listing of the system. Informational Note: See UL 2196, Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables, for information on establishing a rating for a fire-resistive cable system. The UL Guide Information for Electrical Circuit Integrity Systems (FHIT) contains information for identifying the system and its installation limitations to maintain a minimum fire-resistive rating. [760.176(F)(2)](https://2023.antflix.net#760.176(F)(2)) | https://2023.antflix.net#760.176(F)(2) |
Chapter 7 Special Conditions | 760.176(F)(3) | Protectants for cables specified in 760.176(C), (D), and (E) that are part of an electrical circuit protective system shall be identified with the protective system identifier and hourly rating marked on the protectant or the smallest unit container and installed in accordance with the listing of the protective system. Informational Note: See UL 1724, Fire Tests for Electrical Circuit Protective Systems, for information on establishing a rating for an electrical circuit protective system. The UL Guide Information for Electrical Circuit Integrity Systems (FHIT) contains information for identifying the system and its installation limitations to maintain the fire-resistive rating. [760.176(F)(3)](https://2023.antflix.net#760.176(F)(3)) | https://2023.antflix.net#760.176(F)(3) |
Chapter 7 Special Conditions | 760.176(G) | Multiconductor non—power-limited fire alarm cables shall be marked in accordance with Table 760.176(G). Non—power-limited fire alarm circuit cables shall be permitted to be marked with a maximum usage voltage rating of 150 volts. Cables that are listed for circuit integrity shall be identified with the suffix "-CI" as defined in 760.176(F). The temperature rating shall be marked on the jacket of NPLFA cables that have a temperature rating exceeding 60°C (140°F). The jacket of NPLFA cables shall be marked with the conductor size. Informational Note: Cable types are listed in descending order of fire performance. Table 760.176(G) NPLFA Cable Markings Cable Marking Type Reference NPLFP Non-power-limited fire alarm circuit cable for use in other space used for environmental air 760.176(C) and (G) NPLFR Non-power-limited fire alarm circuit riser cable 760.176(D) and (G) NPLF Non-power-limited fire alarm circuit cable 760.176(E) and (G) Notes:Cables identified in 760.176(C), (D), and (E) and meeting the requirements for circuit integrity shall have the additional classification using the suffix "-CI" (for example, NPLFP-CI, NPLFR-CI, and NPLF-CI).Cables containing optical fibers shall be provided with the suffix "-OF". [760.176(G)](https://2023.antflix.net#760.176(G)) | https://2023.antflix.net#760.176(G) |
Chapter 7 Special Conditions | 760.179 | Insulated continuous line-type fire detectors shall be listed in accordance with 760.179(A) through (D). Cable used in a wet location shall be listed for use in wet locations or have a moisture-impervious metal sheath. [760.179](https://2023.antflix.net#760.179) | https://2023.antflix.net#760.179 |
Chapter 7 Special Conditions | 760.179(A) | The cable shall be listed as being resistant to the spread of fire in accordance with 722.179(A)(1), (A)(2), and (A)(3). [760.179(A)](https://2023.antflix.net#760.179(A)) | https://2023.antflix.net#760.179(A) |
Chapter 7 Special Conditions | 760.179(B) | The cable shall have a voltage rating of not less than 300 volts. The cable shall have a temperature rating of not less than 60°C (140°F). [760.179(B)](https://2023.antflix.net#760.179(B)) | https://2023.antflix.net#760.179(B) |
Chapter 7 Special Conditions | 760.179(C) | The cable shall be marked as fire resistance Type FPLP, Type FPLR, or Type FPL in accordance with 722.179(B). The voltage rating shall not be marked on the cable. The temperature rating shall be marked on the jacket of cables that have a temperature rating exceeding 60°C (140°F). The jacket of PLFA cables shall be marked with the conductor size. Informational Note: Voltage ratings on cables might be misinterpreted to suggest that the cables could be suitable for Class 1, electric light, and power applications. Exception: Voltage markings shall be permitted where the cable has multiple listings and voltage marking is required for one or more of the listings. [760.179(C)](https://2023.antflix.net#760.179(C)) | https://2023.antflix.net#760.179(C) |
Chapter 7 Special Conditions | 760.179(D) | The cable jacket compound shall have a high degree of abrasion resistance. [760.179(D)](https://2023.antflix.net#760.179(D)) | https://2023.antflix.net#760.179(D) |
Chapter 7 Special Conditions | 770.1 | This article covers the installation of optical fiber cables. This article does not cover the construction of optical fiber cables. [770.1](https://2023.antflix.net#770.1) | https://2023.antflix.net#770.1 |
Chapter 7 Special Conditions | 770.3 | Installations of optical fiber cables shall comply with 770.3(A) through (D). Only those sections of Chapter 2 and Article 300 referenced in this article shall apply to optical fiber cables. [770.3](https://2023.antflix.net#770.3) | https://2023.antflix.net#770.3 |
Chapter 7 Special Conditions | 770.3(A) | Listed optical fiber cables shall be permitted to be installed in hazardous (classified) locations. The cables shall be sealed in accordance with 501.15, 502.15, 505.16, or 506.16, as applicable. [770.3(A)](https://2023.antflix.net#770.3(A)) | https://2023.antflix.net#770.3(A) |
Chapter 7 Special Conditions | 770.3(B) | The requirements of 300.22(A) for wiring systems shall apply to conductive optical fiber cables. [770.3(B)](https://2023.antflix.net#770.3(B)) | https://2023.antflix.net#770.3(B) |
Chapter 7 Special Conditions | 770.3(C) | Hybrid optical fiber cables shall be classified as electrical cables in accordance with the type of electrical conductors. They shall be constructed, listed, and marked in accordance with the appropriate article for each type of electrical cable. [770.3(C)](https://2023.antflix.net#770.3(C)) | https://2023.antflix.net#770.3(C) |
Chapter 7 Special Conditions | 770.3(D) | Vertical installations of circuit integrity (CI) cables installed in a raceway or cables of fire-resistive cable systems shall be installed in accordance with their listing. [770.3(D)](https://2023.antflix.net#770.3(D)) | https://2023.antflix.net#770.3(D) |
Chapter 7 Special Conditions | 770.21 | Access to electrical equipment shall not be denied by an accumulation of optical fiber cables that prevents removal of panels, including suspended ceiling panels. [770.21](https://2023.antflix.net#770.21) | https://2023.antflix.net#770.21 |
Chapter 7 Special Conditions | 770.24(A) | Optical fiber cables shall be installed in a neat and workmanlike manner. Cables installed exposed on the surface of ceilings and sidewalls shall be supported by the building structure in such a manner that the cable will not be damaged by normal building use. Such cables shall be secured by hardware, including straps; staples; cable ties listed and identified for securement and support; and hangers, or similar fittings, designed and installed so as not to damage the cable. The installation shall also conform to 300.4 and 300.11. Plenum cable ties and other nonmetallic cable accessories used to secure and support cables in other spaces used for environmental air (plenums) shall be listed as having low smoke and heat release properties in accordance with 800.170. Informational Note No. 1: See ANSI/NECA/FOA 301-2016, Standard for Installing and Testing Fiber Optic Cables, ANSI/ TIA-568.0-D-2015, Generic Telecommunications Cabling for Customer Premises, and ANSI/TIA 568.3-D-2016, Optical Fiber Cabling and Components Standard, for accepted industry practices. Informational Note No. 2: See NFPA 90A-2021, Standard for the Installation of Air-Conditioning and Ventilating Systems, for discrete combustible components installed in accordance with 300.22(C). Informational Note No. 3: Paint, plaster, cleaners, abrasives, corrosive residues, or other contaminants may result in an undetermined alteration of optical fiber cable properties. [770.24(A)](https://2023.antflix.net#770.24(A)) | https://2023.antflix.net#770.24(A) |
Chapter 7 Special Conditions | 770.24(B) | Circuit integrity (CI) cable shall be supported at a distance not exceeding 610 mm (24 in.). Cable shall be secured to the noncombustible surface of the building structure. Cable supports and fasteners shall be steel. [770.24(B)](https://2023.antflix.net#770.24(B)) | https://2023.antflix.net#770.24(B) |
Chapter 7 Special Conditions | 770.25 | The accessible portion of abandoned optical fiber cables shall be removed. Where cables are identified for future use with a tag, the tag shall be of sufficient durability to withstand the environment involved. [770.25](https://2023.antflix.net#770.25) | https://2023.antflix.net#770.25 |
Chapter 7 Special Conditions | 770.26 | Installations of optical fiber cables and communications raceways in hollow spaces, vertical shafts, and ventilation or air-handling ducts shall be made so that the possible spread of fire or products of combustion will not be substantially increased. Openings around penetrations of optical fiber cables and communications raceways through fire-resistant-rated walls, partitions, floors, or ceilings shall be fire-stopped using approved methods to maintain the fire resistance rating. Informational Note: Directories of electrical construction materials published by qualified testing laboratories contain many listing installation restrictions necessary to maintain the fire-resistive rating of assemblies where penetrations or openings are made. Building codes also contain restrictions on membrane penetrations on opposite sides of a fire resistance—rated wall assembly. An example is the 600-mm (24-in.) minimum horizontal separation that usually applies between boxes installed on opposite sides of the wall. Assistance in complying with 770.26 can be found in building codes, fire resistance directories, and product listings. [770.26](https://2023.antflix.net#770.26) | https://2023.antflix.net#770.26 |
Chapter 7 Special Conditions | 770.27 | Optical fiber cable shall not be used in such a manner that its operating temperature exceeds that of its rating. [770.27](https://2023.antflix.net#770.27) | https://2023.antflix.net#770.27 |
Chapter 7 Special Conditions | 770.44 | Overhead optical fiber cables containing a non-current-carrying metallic member entering buildings shall comply with 800.44(A) and (B). [770.44](https://2023.antflix.net#770.44) | https://2023.antflix.net#770.44 |
Chapter 7 Special Conditions | 770.44(A) | Where outside plant optical fiber cables and electric light or power conductors are supported by the same pole or are run parallel to each other in-span, the conditions described in 770.44(A)(1) through (A)(4) shall be met. [770.44(A)](https://2023.antflix.net#770.44(A)) | https://2023.antflix.net#770.44(A) |
Chapter 7 Special Conditions | 770.44(A)(1) | Where practicable, the outside plant optical fiber cables shall be located below the electric light or power conductors. [770.44(A)(1)](https://2023.antflix.net#770.44(A)(1)) | https://2023.antflix.net#770.44(A)(1) |
Chapter 7 Special Conditions | 770.44(A)(2) | Attachment of outside plant optical fiber cables to a cross-arm that carries electric light or power conductors shall not be permitted. [770.44(A)(2)](https://2023.antflix.net#770.44(A)(2)) | https://2023.antflix.net#770.44(A)(2) |
Chapter 7 Special Conditions | 770.44(A)(3) | The climbing space through outside plant optical fiber cables shall comply with the requirements of 225.14(B). [770.44(A)(3)](https://2023.antflix.net#770.44(A)(3)) | https://2023.antflix.net#770.44(A)(3) |
Chapter 7 Special Conditions | 770.44(A)(4) | Supply service drops and sets of overhead service conductors of 0 to 750 volts running above and parallel to optical fiber cable service drops shall have a minimum separation of 300 mm (12 in.) at any point in the span, including the point of their attachment to the building. Clearance of not less than 1.0 m (40 in.) shall be maintained between the two services at the pole. [770.44(A)(4)](https://2023.antflix.net#770.44(A)(4)) | https://2023.antflix.net#770.44(A)(4) |
Chapter 7 Special Conditions | 770.44(B) | Outside plant optical fiber cables shall have a vertical clearance of not less than 2.5 m (8 ft) from all points of roofs above which they pass. Exception No. 1: The requirement of 770.44(B) shall not apply to auxiliary buildings such as garages and the like. Exception No. 2: A reduction in clearance above only the overhanging portion of the roof to not less than 450 mm (18 in.) shall be permitted if (1) not more than 1.2 m (4 ft) of optical fiber cable service drop cable passes above the roof overhang, and (2) the cable is terminated at a through- or above-the-roof raceway or approved support. Exception No. 3: Where the roof has a slope of not less than 100 mm in 300 mm (4 in. in 12 in.), a reduction in clearance to not less than 900 mm (3 ft) shall be permitted. Informational Note: See ANSI/IEEE C2-2017, National Electric Safety Code, Part 2, Safety Rules for Overhead Lines, for additional information regarding overhead wires and cables. [770.44(B)](https://2023.antflix.net#770.44(B)) | https://2023.antflix.net#770.44(B) |
Chapter 7 Special Conditions | 770.47 | Underground optical fiber cables entering buildings shall comply with 770.47(A) and (B). [770.47](https://2023.antflix.net#770.47) | https://2023.antflix.net#770.47 |
Chapter 7 Special Conditions | 770.47(A) | Underground conductive optical fiber cables entering buildings with electric light, power, Class 1, or non—power-limited fire alarm circuit conductors in a raceway, handhole enclosure, or manhole shall be located in a section separated from such conductors by means of brick, concrete, or tile partitions or by means of a suitable barrier. [770.47(A)](https://2023.antflix.net#770.47(A)) | https://2023.antflix.net#770.47(A) |
Chapter 7 Special Conditions | 770.47(B) | Direct-buried conductive optical fiber cables shall be separated by at least 300 mm (12 in.) from conductors of any electric light, power, non-power-limited fire alarm circuit conductors, or Class 1 circuit. Exception No. 1: Separation shall not be required where the electric service conductors are installed in raceways or have metal cable armor. Exception No. 2: Separation shall not be required where electric light or power branch-circuit or feeder conductors, non—power-limited fire alarm circuit conductors, or Class 1 circuit conductors are installed in a raceway or in metal-sheathed, metal-clad, or Type UF or Type USE cables. [770.47(B)](https://2023.antflix.net#770.47(B)) | https://2023.antflix.net#770.47(B) |
Chapter 7 Special Conditions | 770.48(A) | Unlisted conductive and nonconductive outside plant optical fiber cables shall be permitted to be installed in building spaces, other than risers, ducts used for environmental air, plenums used for environmental air, and other spaces used for environmental air, where the length of the cable within the building, measured from its point of entrance, does not exceed 15 m (50 ft) and the cable enters the building from the outside and is terminated in an enclosure. The point of entrance shall be permitted to be extended from the penetration of the external wall, roof, or floor slab by continuously enclosing the entrance optical fiber cables in rigid metal conduit (RMC) or intermediate metal conduit (IMC) to the point of emergence. Informational Note: Splice cases or terminal boxes, both metallic and plastic types, typically are used as enclosures for splicing or terminating optical fiber cables. [770.48(A)](https://2023.antflix.net#770.48(A)) | https://2023.antflix.net#770.48(A) |
Chapter 7 Special Conditions | 770.48(B) | Unlisted nonconductive outside plant optical fiber cables shall be permitted to enter the building from the outside and shall be permitted to be installed in any of the following raceways: Intermediate metal conduit (IMC)Rigid metal conduit (RMC)Rigid polyvinyl chloride conduit (PVC)Electrical metallic tubing (EMT)Unlisted nonconductive outside plant cables installed in rigid polyvinyl chloride conduit (PVC) or electrical metallic tubing (EMT) shall not be installed in risers, ducts used for environmental air, plenums used for environmental air, and other spaces used for environmental air. [770.48(B)](https://2023.antflix.net#770.48(B)) | https://2023.antflix.net#770.48(B) |
Chapter 7 Special Conditions | 770.49 | Metal conduit containing optical fiber entrance cable shall be connected by a bonding conductor or grounding electrode conductor to a grounding electrode or, where present, the building grounding electrode system in accordance with 770.100(B). [770.49](https://2023.antflix.net#770.49) | https://2023.antflix.net#770.49 |
Chapter 7 Special Conditions | 770.93 | Optical fiber cables entering the building or terminating on the outside of the building shall comply with 770.93(A) or (B). [770.93](https://2023.antflix.net#770.93) | https://2023.antflix.net#770.93 |
Chapter 7 Special Conditions | 770.93(A) | In installations where an optical fiber cable is exposed to contact with electric light or power conductors and the cable enters the building, the non-current-carrying metallic members shall be either grounded or bonded as specified in 770.100 or interrupted by an insulating joint or equivalent device. The grounding or interruption shall be as close as practicable to the point of entrance. [770.93(A)](https://2023.antflix.net#770.93(A)) | https://2023.antflix.net#770.93(A) |
Chapter 7 Special Conditions | 770.93(B) | In installations where an optical fiber cable is exposed to contact with electric light or power conductors and the cable is terminated on the outside of the building, the non-current-carrying metallic members shall be either grounded or bonded as specified in 770.100 or interrupted by an insulating joint or equivalent device. The grounding, bonding, or interruption shall be as close as practicable to the point of termination of the cable. [770.93(B)](https://2023.antflix.net#770.93(B)) | https://2023.antflix.net#770.93(B) |
Chapter 7 Special Conditions | 770.100 | If required, the non-current-carrying metallic members of optical fiber cables entering buildings shall be bonded or grounded as specified in 770.100(A) through (D). [770.100](https://2023.antflix.net#770.100) | https://2023.antflix.net#770.100 |
Chapter 7 Special Conditions | 770.100(A)(1) | The bonding conductor or grounding electrode conductor shall be listed and shall be permitted to be insulated, covered, or bare. [770.100(A)(1)](https://2023.antflix.net#770.100(A)(1)) | https://2023.antflix.net#770.100(A)(1) |
Chapter 7 Special Conditions | 770.100(A)(2) | The bonding conductor or grounding electrode conductor shall be copper or other corrosion-resistant conductive material, stranded or solid. [770.100(A)(2)](https://2023.antflix.net#770.100(A)(2)) | https://2023.antflix.net#770.100(A)(2) |
Chapter 7 Special Conditions | 770.100(A)(3) | The bonding conductor or grounding electrode conductor shall not be smaller than 14 AWG. It shall have a current-carrying capacity not less than that of the grounded metallic member(s). The bonding conductor or grounding electrode conductor shall not be required to exceed 6 AWG. [770.100(A)(3)](https://2023.antflix.net#770.100(A)(3)) | https://2023.antflix.net#770.100(A)(3) |
Chapter 7 Special Conditions | 770.100(A)(4) | The bonding conductor or grounding electrode conductor shall be as short as practicable. In one- and two- family dwellings, the bonding conductor or grounding electrode conductor shall be as short as practicable not to exceed 6.0 m (20 ft) in length. Informational Note: Similar bonding conductor or grounding electrode conductor length limitations applied at apartment buildings and commercial buildings help to reduce voltages that may develop between the building's power and communications systems during lightning events. Exception: In one- and two-family dwellings if it is not practicable to achieve an overall maximum bonding conductor or grounding electrode conductor length of 6.0 m (20 ft), a separate ground rod meeting the minimum dimensional criteria of 770.100(B)(3)(2) shall be driven, the grounding electrode conductor shall be connected to the separate ground rod in accordance with 770.100(C), and the separate ground rod shall be bonded to the power grounding electrode system in accordance with 770.100(D). [770.100(A)(4)](https://2023.antflix.net#770.100(A)(4)) | https://2023.antflix.net#770.100(A)(4) |
Chapter 7 Special Conditions | 770.100(A)(5) | The bonding conductor or grounding electrode conductor shall be run in as straight a line as practicable. [770.100(A)(5)](https://2023.antflix.net#770.100(A)(5)) | https://2023.antflix.net#770.100(A)(5) |
Chapter 7 Special Conditions | 770.100(A)(6) | Bonding conductors and grounding electrode conductors shall be protected where exposed to physical damage. Where the bonding conductor or grounding electrode conductor is installed in a metal raceway, both ends of the raceway shall be bonded to the contained conductor or to the same terminal or electrode to which the bonding conductor or grounding electrode conductor is connected. [770.100(A)(6)](https://2023.antflix.net#770.100(A)(6)) | https://2023.antflix.net#770.100(A)(6) |
Chapter 7 Special Conditions | 770.100(B) | The bonding conductor and grounding electrode conductor shall be connected in accordance with 770.100(B)(1), (B)(2), or (B)(3). [770.100(B)](https://2023.antflix.net#770.100(B)) | https://2023.antflix.net#770.100(B) |
Chapter 7 Special Conditions | 770.100(B)(1) | If the building or structure served has an intersystem bonding termination as required by 250.94, the bonding conductor shall be connected to the intersystem bonding termination. Informational Note: See Informational Note Figure 800.100(B)(1) for an illustration of the application of the bonding conductor in buildings or structures equipped with an intersystem bonding termination. [770.100(B)(1)](https://2023.antflix.net#770.100(B)(1)) | https://2023.antflix.net#770.100(B)(1) |
Chapter 7 Special Conditions | 770.100(B)(2) | If an intersystem bonding termination is established, 250.94(A) shall apply. If the building or structure served has no intersystem bonding termination, the bonding conductor or grounding electrode conductor shall be connected to the nearest accessible location on one of the following:The building or structure grounding electrode system as covered in 250.50The power service accessible means external to enclosures using the options identified in 250.94(A), ExceptionThe nonflexible metal power service racewayThe service equipment enclosureThe grounding electrode conductor or the grounding electrode conductor metal enclosure of the power serviceThe grounding electrode conductor or the grounding electrode of a building or structure disconnecting means that is connected to a grounding electrode as covered in 250.32The grounded interior metal water piping system, within 1.5 m (5 ft) from its point of entrance to the building, as covered in 250.52Informational Note: See Informational Note Figure 800.100(B)(2) for an illustration of the application of the bonding conductor in buildings or structures not equipped with an intersystem bonding termination or terminal block providing access to the building grounding electrode system. [770.100(B)(2)](https://2023.antflix.net#770.100(B)(2)) | https://2023.antflix.net#770.100(B)(2) |
Chapter 7 Special Conditions | 770.100(B)(3) | If the building or structure served has no intersystem bonding termination or grounding means, as described in 770.100(B)(2), the grounding electrode conductor shall be connected to either of the following: To any one of the individual grounding electrodes described in 250.52(A)(1), (A)(2), (A)(3), or (A)(4).If the building or structure served has no grounding means, as described in 770.100(B)(2) or (B)(3)(l), to any one of the individual grounding electrodes described in 250.52(A)(7) and (A)(8) or to a ground rod or pipe not less than 1.5 m (5 ft) in length and 12.7 mm (1/2 in.) in diameter, driven, where practicable, into permanently damp earth and separated from lightning protection system conductors as covered in 800.53 and at least 1.8 m (6 ft) from electrodes of other systems. Steam, hot water pipes, or lightning protection system conductors shall not be employed as electrodes for non-current-carrying metallic members. [770.100(B)(3)](https://2023.antflix.net#770.100(B)(3)) | https://2023.antflix.net#770.100(B)(3) |
Chapter 7 Special Conditions | 770.100(C) | Connections to grounding electrodes shall comply with 250.70. [770.100(C)](https://2023.antflix.net#770.100(C)) | https://2023.antflix.net#770.100(C) |
Chapter 7 Special Conditions | 770.100(D) | A bonding jumper not smaller than 6 AWG copper or equivalent shall be connected between the grounding electrode and power grounding electrode system at the building or structure served where separate electrodes are used. Exception: At mobile homes as covered in 770.106. Informational Note No. 1: See 250.60 for connection to a lightning protection system. Informational Note No. 2: Bonding together of all separate electrodes limits potential differences between them and between their associated wiring systems. [770.100(D)](https://2023.antflix.net#770.100(D)) | https://2023.antflix.net#770.100(D) |
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