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Chapter 7 Special Conditions | 708.5 | Physical security shall be provided for critical operations power systems in accordance with 708.5(A) and (B). [708.5](https://2023.antflix.net#708.5) | https://2023.antflix.net#708.5 |
Chapter 7 Special Conditions | 708.5(A) | Based on the results of the risk assessment, a strategy for providing physical security for critical operations power systems shall be developed, documented, and implemented. [708.5(A)](https://2023.antflix.net#708.5(A)) | https://2023.antflix.net#708.5(A) |
Chapter 7 Special Conditions | 708.5(B) | Electrical circuits and equipment for critical operations power systems shall be accessible to qualified personnel only. [708.5(B)](https://2023.antflix.net#708.5(B)) | https://2023.antflix.net#708.5(B) |
Chapter 7 Special Conditions | 708.6(A) | The authority having jurisdiction shall conduct or witness a test of the complete system upon installation and periodically afterward. [708.6(A)](https://2023.antflix.net#708.6(A)) | https://2023.antflix.net#708.6(A) |
Chapter 7 Special Conditions | 708.6(B) | Systems shall be tested periodically on a schedule approved by the authority having jurisdiction to ensure the systems are maintained in proper operating condition. [708.6(B)](https://2023.antflix.net#708.6(B)) | https://2023.antflix.net#708.6(B) |
Chapter 7 Special Conditions | 708.6(C) | The authority having jurisdiction shall require a documented preventive maintenance program for critical operations power systems. Informational Note: See NFPA 70B-2019, Recommended Practice for Electrical Equipment Maintenance, for information concerning maintenance. [708.6(C)](https://2023.antflix.net#708.6(C)) | https://2023.antflix.net#708.6(C) |
Chapter 7 Special Conditions | 708.6(D) | A written record shall be kept of such tests and maintenance. [708.6(D)](https://2023.antflix.net#708.6(D)) | https://2023.antflix.net#708.6(D) |
Chapter 7 Special Conditions | 708.6(E) | Means for testing all critical power systems during maximum anticipated load conditions shall be provided. Informational Note: See NFPA 110-2019, Standard for Emergency and Standby Power Systems, for information concerning testing and maintenance of emergency power supply systems (EPSSs) that are also applicable to COPS. [708.6(E)](https://2023.antflix.net#708.6(E)) | https://2023.antflix.net#708.6(E) |
Chapter 7 Special Conditions | 708.7 | COPS that are connected to a communication network and have the capability to permit control of any portion of the premises COPS shall comply with either of the following: The ability to control the system is limited to a direct connection through a local nonnetworked interface.It is connected through a networked interface complying with one of the following methods:The system and associated software are identified as being evaluated for cybersecurity.A cybersecurity assessment is conducted on the connected system to determine vulnerabilities to cyberattacks.The cybersecurity assessment shall be conducted when the system configuration changes and at not more than 5-year intervals.Documentation of the evaluation, assessment, and certification shall be made available to those authorized to inspect, operate, and maintain the system.Informational Note No. 1: See ANSI/ISA 62443, Cybersecurity Standards series; UL 2900, Cybersecurity Standards series; or the NIST Framework for Improving Critical infrastructure Cybersecurity, Version 1.1, for assessment requirements.Informational Note No. 2: Examples of the commissioning certification used to demonstrate the system has been investigated for cybersecurity vulnerabilities could be one of the following:The ISA Security Compliance Institute (ISCI) conformity assessment programCertification of compliance by a nationally recognized test laboratoryManufacturer certification for the specific type and brand of system provided [708.7](https://2023.antflix.net#708.7) | https://2023.antflix.net#708.7 |
Chapter 7 Special Conditions | 708.8(A) | A commissioning plan shall be developed and documented. Informational Note No. 1: See NFPA 70B-2019, Recommended Practice for Electrical Equipment Maintenance, for further information on developing a commissioning program. Informational Note No. 2: See 708.7 for cybersecurity assessments. [708.8(A)](https://2023.antflix.net#708.8(A)) | https://2023.antflix.net#708.8(A) |
Chapter 7 Special Conditions | 708.8(B) | The installation of the equipment shall undergo component and system tests to ensure that, when energized, the system will function properly. [708.8(B)](https://2023.antflix.net#708.8(B)) | https://2023.antflix.net#708.8(B) |
Chapter 7 Special Conditions | 708.8(C) | A set of baseline test results shall be documented for comparison with future periodic maintenance testing to identify equipment deterioration. [708.8(C)](https://2023.antflix.net#708.8(C)) | https://2023.antflix.net#708.8(C) |
Chapter 7 Special Conditions | 708.8(D) | A functional performance test program shall be established, documented, and executed upon complete installation of the critical system in order to establish a baseline reference for future performance requirements. Informational Note: See Informative Annex F, Availability and Reliability for Critical Operations Power Systems; and Development and Implementation of Functional Performance Tests (FPTs) for Critical Operations Power Systems, for more information on developing and implementing a functional performance test program. [708.8(D)](https://2023.antflix.net#708.8(D)) | https://2023.antflix.net#708.8(D) |
Chapter 7 Special Conditions | 708.10(A)(1) | In a building or at a structure where a critical operations power system and any other type of power system are present, all boxes and enclosures (including transfer switches, generators, and power panels) for critical operations power system circuits shall be permanently marked so they will be readily identified as a component of the critical operations power system. [708.10(A)(1)](https://2023.antflix.net#708.10(A)(1)) | https://2023.antflix.net#708.10(A)(1) |
Chapter 7 Special Conditions | 708.10(A)(2) | In a building in which COPS are present with other types of power systems described in other sections in this article, the cover plates for the receptacles or the receptacles themselves supplied from the COPS shall have a distinctive color or marking so as to be readily identifiable. Nonlocking-type, 125-volt, 15- and 20-ampere receptacles supplied from the COPS shall have an illuminated face or an indicator light to indicate that there is power to the receptacle. Exception: If the COPS supplies power to a DCOA that is a stand-alone building, receptacle cover plates or the receptacles themselves shall not be required to have distinctive marking. [708.10(A)(2)](https://2023.antflix.net#708.10(A)(2)) | https://2023.antflix.net#708.10(A)(2) |
Chapter 7 Special Conditions | 708.10(B) | Wiring of two or more COPS circuits supplied from the same source shall be permitted in the same raceway, cable, box, or cabinet. In other than transfer equipment enclosures, wiring from a COPS source or COPS source distribution overcurrent protection to critical loads shall be kept entirely independent of all other wiring and equipment. [708.10(B)](https://2023.antflix.net#708.10(B)) | https://2023.antflix.net#708.10(B) |
Chapter 7 Special Conditions | 708.10(C) | COPS feeders shall comply with 708.10(C)(1) through (C)(3). [708.10(C)](https://2023.antflix.net#708.10(C)) | https://2023.antflix.net#708.10(C) |
Chapter 7 Special Conditions | 708.10(C)(1) | The wiring of the COPS system shall be protected against physical damage. Only the following wiring methods shall be permitted: Rigid metal conduit, intermediate metal conduit, or Type Ml cable.Where encased in not less than 50 mm (2 in.) of concrete, any of the following wiring methods shall be permitted:Schedule 40 or Schedule 80 rigid polyvinyl chloride conduit (PVC)Reinforced thermosetting resin conduit (RTRC)Electrical metallic tubing (EMT)Flexible nonmetallic or jacketed metallic racewaysJacketed metallic cable assemblies listed for installation in concreteWhere provisions must be made for flexibility at equipment connection, one or more of the following shall also be permitted:Flexible metal fittingsFlexible metal conduit with listed fittingsLiquidtight flexible metal conduit with listed fittings [708.10(C)(1)](https://2023.antflix.net#708.10(C)(1)) | https://2023.antflix.net#708.10(C)(1) |
Chapter 7 Special Conditions | 708.10(C)(2) | Feeders shall meet one of the following conditions: The cable or raceway is protected by a listed electrical circuit protective system with a minimum 2-hour fire rating.Informational Note No. 1: See UL 1724, Fire Tests for Electrical Circuit Protective Systems, for one method of defining an electrical circuit protective system, by establishing a rating when tested. UL Guide Information for Electrical Circuit Integrity Systems (FHIT) contains information to identify the system and its installation limitations to maintain a minimum 2-hour fire resistive rating.The cable or raceway is a listed fire-resistive cable system with a minimum 2-hour fire rating.Informational Note No. 2: See UL 2196-2017, Standard for Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables, for testing requirements for fire-resistive cables.Informational Note No. 3: The listing organization provides information for fire-resistive cable systems on proper installation requirements to maintain the fire rating.The cable or raceway is protected by a listed fire-rated assembly that has a minimum fire rating of 2 hours.The cable or raceway is encased in a minimum of 50 mm (2 in.) of concrete. [708.10(C)(2)](https://2023.antflix.net#708.10(C)(2)) | https://2023.antflix.net#708.10(C)(2) |
Chapter 7 Special Conditions | 708.10(C)(3) | Where COPS feeders are installed below the level of the 100-year floodplain, the insulated circuit conductors shall be listed for use in a wet location and be installed in a wiring method that is permitted for use in wet locations. [708.10(C)(3)](https://2023.antflix.net#708.10(C)(3)) | https://2023.antflix.net#708.10(C)(3) |
Chapter 7 Special Conditions | 708.10(D) | Outside the DCOA. COPS branch circuits installed outside the DCOA shall comply with the physical and fire protection requirements of 708.10(C)(1) through (C)(3).Within the DCOA. Any of the wiring methods recognized in Chapter 3 of this Code shall be permitted within the DCOA. [708.10(D)](https://2023.antflix.net#708.10(D)) | https://2023.antflix.net#708.10(D) |
Chapter 7 Special Conditions | 708.11(A) | COPS branch circuit distribution equipment shall be located within the same DCOA as the branch circuits it supplies. [708.11(A)](https://2023.antflix.net#708.11(A)) | https://2023.antflix.net#708.11(A) |
Chapter 7 Special Conditions | 708.11(B) | Equipment for COPS feeder circuits (including transfer equipment, transformers, and panelboards) shall comply with the following: Be located in spaces with a 2-hour fire resistance ratingBe located above the 100-year floodplain [708.11(B)](https://2023.antflix.net#708.11(B)) | https://2023.antflix.net#708.11(B) |
Chapter 7 Special Conditions | 708.12 | Feeders and branch circuits supplied by the COPS shall supply only equipment specified as required for critical operations use. [708.12](https://2023.antflix.net#708.12) | https://2023.antflix.net#708.12 |
Chapter 7 Special Conditions | 708.14 | All conductors or cables shall be installed using any of the metal wiring methods permitted by 708.10(C)(1) and, in addition, shall comply with the following, as applicable: All cables for fire alarm, security, signaling systems, and emergency communications shall be shielded twisted pair cables or installed to comply with the performance requirements of the system.Shields of cables for fire alarm, security, signaling systems, and emergency communications shall be arranged in accordance with the manufacturer's published installation instructions.Optical fiber cables shall be used for connections between two or more buildings on the property and under single management.A listed primary protector shall be provided on all communications circuits. Listed secondary protectors shall be provided at the terminals of the communications circuits.Conductors for all control circuits rated above 50 volts shall be rated not less than 600 volts.Communications, fire alarm, and signaling circuits shall use relays with contact ratings that exceed circuit voltage and current ratings in the controlled circuit.All cables for fire alarm, security, emergency communications, and signaling systems shall be riser-rated and shall be part of a listed 2-hour fire-resistive cable system or protected by a listed 2-hour electrical circuit protective system.Control, monitoring, and power wiring to HVAC systems shall be part of a listed 2-hour fire-resistive cable system or protected by a listed 2-hour electrical circuit protective system. [708.14](https://2023.antflix.net#708.14) | https://2023.antflix.net#708.14 |
Chapter 7 Special Conditions | 708.20(A) | Current supply shall be such that, in the event of failure of the normal supply to the DCOA, critical operations power shall be available within the time required for the application. The supply system for critical operations power, in addition to the normal services to the building and meeting the general requirements of this section, shall be one or more of the types of systems described in 708.20(E) through (H). Informational Note No. 1: Assignment of degree of reliability of the recognized critical operations power system depends on the careful evaluation in accordance with the risk assessment. Informational Note No. 2: See IEEE 3006.5—2014, Recommended Practice for the Use of Probability Methods for Conducting a Reliability Analysis of Industrial and Commercial Power Systems, for guidance about determining degree of reliability. [708.20(A)](https://2023.antflix.net#708.20(A)) | https://2023.antflix.net#708.20(A) |
Chapter 7 Special Conditions | 708.20(B) | Where located within a building, equipment for sources of power as described in 708.20(E) through (H) shall be installed either in spaces fully protected by an approved automatic fire protection system or in spaces with a 2-hour fire rating. [708.20(B)](https://2023.antflix.net#708.20(B)) | https://2023.antflix.net#708.20(B) |
Chapter 7 Special Conditions | 708.20(C) | All sources of power shall be grounded as a separately derived source in accordance with 250.30. Exception: Where installed in accordance with 708.10(C) and 708.11(B), equipment containing the main bonding jumper or system bonding jumper for the normal source and the feeder wiring to the transfer equipment shall not be required to be grounded as a separately derived source. [708.20(C)](https://2023.antflix.net#708.20(C)) | https://2023.antflix.net#708.20(C) |
Chapter 7 Special Conditions | 708.20(D) | Surge protection devices shall be provided at all facility distribution voltage levels. [708.20(D)](https://2023.antflix.net#708.20(D)) | https://2023.antflix.net#708.20(D) |
Chapter 7 Special Conditions | 708.20(E) | An automatic battery charging means shall be provided. Batteries shall be compatible with the charger for that particular installation. Automotive-type batteries shall not be used. [708.20(E)](https://2023.antflix.net#708.20(E)) | https://2023.antflix.net#708.20(E) |
Chapter 7 Special Conditions | 708.20(F)(1) | Generator sets driven by a prime mover shall be provided with means for automatically starting the prime mover on failure of the normal power source. A time-delay feature permitting a minimum 15-minute setting shall be provided to avoid retransfer in case of short-time reestablishment of the normal source. [708.20(F)(1)](https://2023.antflix.net#708.20(F)(1)) | https://2023.antflix.net#708.20(F)(1) |
Chapter 7 Special Conditions | 708.20(F)(2) | Where power is needed for the operation of the fuel transfer pumps to deliver fuel to a generator set day tank, this pump shall be connected to the COPS. [708.20(F)(2)](https://2023.antflix.net#708.20(F)(2)) | https://2023.antflix.net#708.20(F)(2) |
Chapter 7 Special Conditions | 708.20(F)(3) | Prime movers shall not be solely dependent on a public utility gas system for their fuel supply or municipal water supply for their cooling systems. Means shall be provided for automatically transferring from one fuel supply to another where dual fuel supplies are used. [708.20(F)(3)](https://2023.antflix.net#708.20(F)(3)) | https://2023.antflix.net#708.20(F)(3) |
Chapter 7 Special Conditions | 708.20(F)(4) | Where a storage battery is used for control or signal power or as the means of starting the prime mover, it shall be suitable for the purpose and shall be equipped with an automatic charging means independent of the generator set. Where the battery charger is required for the operation of the generator set, it shall be connected to the COPS. Where power is required for the operation of dampers used to ventilate the generator set, the dampers shall be connected to the COPS. [708.20(F)(4)](https://2023.antflix.net#708.20(F)(4)) | https://2023.antflix.net#708.20(F)(4) |
Chapter 7 Special Conditions | 708.20(F)(5) | Permanently Installed Generators and Portable Generators Greater Than 15 kW. Where an outdoor housed generator set is equipped with a readily accessible disconnecting means in accordance with 445.18, and the disconnecting means is located within sight of the building or structure supplied, an additional disconnecting means shall not be required where ungrounded conductors serve or pass through the building or structure. Where the generator supply conductors terminate at a disconnecting means in or on a building or structure, the disconnecting means shall meet the requirements of 225.36.Portable Generators 15 kW or Less. Where a portable generator, rated 15 kW or less, is installed using a flanged inlet or other cord-and plug-type connection, a disconnecting means shall not be required where ungrounded conductors serve or pass through a building or structure. [708.20(F)(5)](https://2023.antflix.net#708.20(F)(5)) | https://2023.antflix.net#708.20(F)(5) |
Chapter 7 Special Conditions | 708.20(F)(6) | Where the COPS is supplied by a single generator, a means to connect a portable or vehicle-mounted generator shall be provided. [708.20(F)(6)](https://2023.antflix.net#708.20(F)(6)) | https://2023.antflix.net#708.20(F)(6) |
Chapter 7 Special Conditions | 708.20(F)(7) | Where internal combustion engines are used as the prime mover, an on-site fuel supply shall be provided. The on-site fuel supply shall be secured and protected in accordance with the risk assessment. [708.20(F)(7)](https://2023.antflix.net#708.20(F)(7)) | https://2023.antflix.net#708.20(F)(7) |
Chapter 7 Special Conditions | 708.20(G) | Uninterruptible power supplies used as the sole source of power for COPS shall comply with 708.20(E) and (F). [708.20(G)](https://2023.antflix.net#708.20(G)) | https://2023.antflix.net#708.20(G) |
Chapter 7 Special Conditions | 708.20(H) | Installation of a fuel cell system shall meet the requirements of Parts II through VIII of Article 692. [708.20(H)](https://2023.antflix.net#708.20(H)) | https://2023.antflix.net#708.20(H) |
Chapter 7 Special Conditions | 708.21 | Adequate ventilation shall be provided for the alternate power source for continued operation under maximum anticipated ambient temperatures. Informational Note: See NFPA 110-2019, Standard for Emergency and Standby Power Systems, and NFPA 111-2019, Standard on Stored Electrical Energy Emergency and Standby Power Systems, for additional information on ventilation air for combustion and cooling. [708.21](https://2023.antflix.net#708.21) | https://2023.antflix.net#708.21 |
Chapter 7 Special Conditions | 708.22(A) | A COPS shall have capacity and rating for all loads to be operated simultaneously for continuous operation with variable load for an unlimited number of hours, except for required maintenance of the power source. A portable, temporary, or redundant alternate power source shall be available for use whenever the COPS power source is out of service for maintenance or repair. [708.22(A)](https://2023.antflix.net#708.22(A)) | https://2023.antflix.net#708.22(A) |
Chapter 7 Special Conditions | 708.22(B) | The alternate power source shall be permitted to supply COPS emergency, legally required standby, and optional loads where the source has adequate capacity or where load management (that includes automatic selective load pickup and load shedding) is provided as needed to ensure adequate power to (1) the COPS and emergency circuits, (2) the legally required standby circuits, and (3) the optional standby circuits, in that order of priority. The alternate power source shall be permitted to be used for peak load shaving, provided these conditions are met. Peak load-shaving operation shall be permitted for satisfying the test requirement of 708.6(B), provided all other conditions of 708.6 are met. [708.22(B)](https://2023.antflix.net#708.22(B)) | https://2023.antflix.net#708.22(B) |
Chapter 7 Special Conditions | 708.22(C) | The alternate power source shall be capable of operating the COPS for a minimum of 72 hours at full load of DCOA with a steady-state voltage within ±10 percent of nominal utilization voltage. [708.22(C)](https://2023.antflix.net#708.22(C)) | https://2023.antflix.net#708.22(C) |
Chapter 7 Special Conditions | 708.24(A) | Transfer equipment, including automatic transfer switches, shall be automatic, listed, and identified for emergency use. Transfer equipment shall be designed and installed to prevent the inadvertent interconnection of normal and critical operations sources of supply in any operation of the transfer equipment. Transfer equipment and electric power production systems installed to permit operation in parallel with the normal source shall meet the requirements of Parts I and II of Article 705. [708.24(A)](https://2023.antflix.net#708.24(A)) | https://2023.antflix.net#708.24(A) |
Chapter 7 Special Conditions | 708.24(B) | Means shall be permitted to bypass and isolate the transfer equipment. If bypass isolation transfer switches are used, inadvertent parallel operation shall be avoided. [708.24(B)](https://2023.antflix.net#708.24(B)) | https://2023.antflix.net#708.24(B) |
Chapter 7 Special Conditions | 708.24(C) | If used with sources that are not inherently synchronized, automatic transfer switches shall comply with the following: Automatic transfer switches shall be listed for emergency use.Automatic transfer switches shall be electrically operated and mechanically held. [708.24(C)](https://2023.antflix.net#708.24(C)) | https://2023.antflix.net#708.24(C) |
Chapter 7 Special Conditions | 708.24(D) | If COPS loads are supplied by a single feeder, the COPS shall include redundant transfer equipment or a bypass isolation transfer switch to facilitate maintenance as required in 708.6(C) without jeopardizing continuity of power. If the redundant transfer equipment or bypass isolation transfer switch is manual (or nonautomatic), then it shall be actively supervised by a qualified person when the primary (automatic) transfer equipment is disabled for maintenance or repair. [708.24(D)](https://2023.antflix.net#708.24(D)) | https://2023.antflix.net#708.24(D) |
Chapter 7 Special Conditions | 708.24(E) | Transfer equipment shall supply only COPS loads. [708.24(E)](https://2023.antflix.net#708.24(E)) | https://2023.antflix.net#708.24(E) |
Chapter 7 Special Conditions | 708.24(F) | The short-circuit current rating of the transfer equipment, based on the specific overcurrent protective device type and settings protecting the transfer equipment, shall be field marked on the exterior of the transfer equipment. [708.24(F)](https://2023.antflix.net#708.24(F)) | https://2023.antflix.net#708.24(F) |
Chapter 7 Special Conditions | 708.30 | Branch circuits supplied by the COPS shall only supply equipment specified as required for critical operations use. [708.30](https://2023.antflix.net#708.30) | https://2023.antflix.net#708.30 |
Chapter 7 Special Conditions | 708.50 | The feeder- and branch-circuit overcurrent devices shall be accessible to authorized persons only. [708.50](https://2023.antflix.net#708.50) | https://2023.antflix.net#708.50 |
Chapter 7 Special Conditions | 708.52(A) | The requirements of 708.52 shall apply to critical operations (including multiple occupancy buildings) with critical operation areas. [708.52(A)](https://2023.antflix.net#708.52(A)) | https://2023.antflix.net#708.52(A) |
Chapter 7 Special Conditions | 708.52(B) | Where ground-fault protection is provided for operation of the service disconnecting means or feeder disconnecting means as specified by 230.95 or 215.10, an additional step of ground-fault protection shall be provided in all next level feeder disconnecting means downstream toward the load. Such protection shall consist of overcurrent devices and current transformers or other equivalent protective equipment that causes the feeder disconnecting means to open. [708.52(B)](https://2023.antflix.net#708.52(B)) | https://2023.antflix.net#708.52(B) |
Chapter 7 Special Conditions | 708.52(C) | When equipment ground-fault protection is first installed, each level shall be tested to ensure that ground-fault protection is operational. Informational Note: Testing is intended to verify the ground-fault function is operational. The performance test is not intended to verify selectivity in 708.52(D), as this is often coordinated similarly to circuit breakers by reviewing time and current curves and properly setting the equipment. (Selectivity of fuses and circuit breakers is not performance tested for overload and short circuit.) [708.52(C)](https://2023.antflix.net#708.52(C)) | https://2023.antflix.net#708.52(C) |
Chapter 7 Special Conditions | 708.52(D) | Ground-fault protection for operation of the service and feeder disconnecting means shall be fully selective such that the feeder device, but not the service device, shall open on ground faults on the load side of the feeder device. Separation of ground-fault protection time-current characteristics shall conform to the manufacturer's recommendations and shall consider all required tolerances and disconnect operating time to achieve 100 percent selectivity. Informational Note: See 230.95, Informational Note No. 4, for transfer of alternate source where ground-fault protection is applied. [708.52(D)](https://2023.antflix.net#708.52(D)) | https://2023.antflix.net#708.52(D) |
Chapter 7 Special Conditions | 708.54(A) | Critical operations power system(s) overcurrent protective devices (OCPDs) shall be selectively coordinated with all supply-side and load-side OCPDs. Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system. [708.54(A)](https://2023.antflix.net#708.54(A)) | https://2023.antflix.net#708.54(A) |
Chapter 7 Special Conditions | 708.54(B) | Where critical operations power system(s) OCPDs are replaced, they shall be reevaluated to ensure selective coordination is maintained with all supply-side and load-side OCPDs. [708.54(B)](https://2023.antflix.net#708.54(B)) | https://2023.antflix.net#708.54(B) |
Chapter 7 Special Conditions | 708.54(C) | If modifications, additions, or deletions to the critical operations power system(s) occur, selective coordination of the critical operations power system(s) OCPDs with all supply-side and load-side OCPDs shall be reevaluated. Exception: Selective coordination shall not be required between two overcurrent devices located in series if no loads are connected in parallel with the downstream device. Informational Note: See Informational Note Figure 708.54(C) for an example of how critical operations power system OCPDs selectively coordinate with all supply-side OCPDs. OCPD D selectively coordinates with OCPDs C, F, E, B, and A. OCPD C selectively coordinates with OCPDs F, E, B, and A. OCPD F selectively coordinates with OCPD E. OCPD B is not required to selectively coordinate with OCPD A because OCPD B is not a critical operations power system OCPD. Informational Note Figure 708.54(C) Critical Operations Power System Selective Coordination. [708.54(C)](https://2023.antflix.net#708.54(C)) | https://2023.antflix.net#708.54(C) |
Chapter 7 Special Conditions | 708.64 | A facility with a COPS shall have a documented emergency operations plan. The plan shall consider emergency operations and response, recovery, and continuity of operations. Informational Note: See NFPA 1600-2019, Standard on Continuity, Emergency, and Crisis Management, Section 5.7, which provides guidance for the development and implementation of emergency plans. [708.64](https://2023.antflix.net#708.64) | https://2023.antflix.net#708.64 |
Chapter 7 Special Conditions | 710.1 | This article covers electric power production systems that operate in island mode not connected to an electric utility or other electric power production and distribution network. Informational Note: These systems operate independently from an electric utility and include isolated microgrid systems. Standalone systems often include a single or a compatible interconnection of sources such as engine generators, solar PV, wind, ESS, or batteries. [710.1](https://2023.antflix.net#710.1) | https://2023.antflix.net#710.1 |
Chapter 7 Special Conditions | 710.6 | All power production equipment or systems shall be approved for use in island mode and comply with one of the following: Be listedBe evaluated for the application and have a field label applied [710.6](https://2023.antflix.net#710.6) | https://2023.antflix.net#710.6 |
Chapter 7 Special Conditions | 710.10 | A permanent plaque, label, or directory shall be installed at a building supplied by a stand-alone system at the power source disconnecting means location, or at an approved readily visible location. The plaque, label, or directory shall denote the location of each power source disconnecting means for the building or be grouped with other plaques or directories for other on-site sources. Where multiple sources supply the building, markings shall comply with 705.10. [710.10](https://2023.antflix.net#710.10) | https://2023.antflix.net#710.10 |
Chapter 7 Special Conditions | 710.12 | The maximum current shall be the stand-alone continuous inverter input current rating when the inverter is producing rated power at the lowest input voltage. [710.12](https://2023.antflix.net#710.12) | https://2023.antflix.net#710.12 |
Chapter 7 Special Conditions | 710.15 | Premises wiring systems shall be adequate to meet the requirements of this Code for similar installations supplied by a feeder or service. The wiring on the supply side of the building or structure disconnecting means shall comply with the requirements of this Code, except as modified by 710.15(A) through (G). [710.15](https://2023.antflix.net#710.15) | https://2023.antflix.net#710.15 |
Chapter 7 Special Conditions | 710.15(A) | Power supply to premises wiring systems fed by stand-alone or isolated microgrid power sources shall be permitted to have less capacity than the calculated load. The capacity of the sum of all sources of the stand-alone supply shall be equal to or greater than the load posed by the largest single utilization equipment connected to the system. Calculated general lighting loads shall not be considered as a single load. Informational Note: For general-use loads the system capacity can be calculated using the sum of the capacity of the firm sources, such as generators and ESS inverters. For specialty loads intended to be powered directly from a variable source, the capacity can be calculated using the sum of the variable sources, such as PV or wind inverters, or the combined capacity of both firm and variable sources. [710.15(A)](https://2023.antflix.net#710.15(A)) | https://2023.antflix.net#710.15(A) |
Chapter 7 Special Conditions | 710.15(B) | The circuit conductors between a stand-alone source and a building or structure disconnecting means shall be sized based on the sum of the output ratings of the stand-alone source(s). For three-phase interconnections, the phase loads shall be controlled or balanced to be compatible with specifications of the sum of the power supply capacities. [710.15(B)](https://2023.antflix.net#710.15(B)) | https://2023.antflix.net#710.15(B) |
Chapter 7 Special Conditions | 710.15(C) | Stand-alone and isolated microgrid systems shall be permitted to supply 120 volts to single-phase, 3-wire, 120/240-volt service equipment or distribution panels where there are no 240-volt outlets and where there are no multiwire branch circuits. In all installations, the sum of the ratings of the power sources shall be less than the rating of the neutral bus in the service equipment. This equipment shall be marked with the following words or equivalent: WARNING:SINGLE 120-VOLT SUPPLY. DO NOT CONNECT MULTI-WIRE BRANCH CIRCUITS! The warning sign(s) or label(s) shall comply with 110.21(B). [710.15(C)](https://2023.antflix.net#710.15(C)) | https://2023.antflix.net#710.15(C) |
Chapter 7 Special Conditions | 710.15(D) | Stand-alone and microgrid systems shall be permitted to supply three-phase, 3-wire or 4-wire systems. [710.15(D)](https://2023.antflix.net#710.15(D)) | https://2023.antflix.net#710.15(D) |
Chapter 7 Special Conditions | 710.15(E) | Energy storage or backup power supplies shall not be required. [710.15(E)](https://2023.antflix.net#710.15(E)) | https://2023.antflix.net#710.15(E) |
Chapter 7 Special Conditions | 710.15(F) | The stand-alone power sources shall be controlled during operation so that voltage and frequency are supplied within limits compatible with the connected loads. [710.15(F)](https://2023.antflix.net#710.15(F)) | https://2023.antflix.net#710.15(F) |
Chapter 7 Special Conditions | 722.1 | This article covers the general requirements for the installation of single- and multiple-conductor cables used in Class 2 and Class 3 power-limited circuits, power-limited fire alarm (PLFA) circuits, and Class 4 fault-managed power circuits. [722.1](https://2023.antflix.net#722.1) | https://2023.antflix.net#722.1 |
Chapter 7 Special Conditions | 722.3 | In addition to the requirements of this article, installation of cables shall comply with the articles or sections listed in 722.3(A) through (O). Only those sections of Article 300 referenced in this article shall apply. [722.3](https://2023.antflix.net#722.3) | https://2023.antflix.net#722.3 |
Chapter 7 Special Conditions | 722.3(A) | The number and size of conductors and cables, as well as raceway sizing, shall comply with 300.17. [722.3(A)](https://2023.antflix.net#722.3(A)) | https://2023.antflix.net#722.3(A) |
Chapter 7 Special Conditions | 722.3(B) | Installation of power-limited circuits shall comply with 300.21. [722.3(B)](https://2023.antflix.net#722.3(B)) | https://2023.antflix.net#722.3(B) |
Chapter 7 Special Conditions | 722.3(C) | Power-limited circuits installed in ducts, plenums, or other space used for environmental air shall comply with 300.22. Exception No. 1: Cables selected in accordance with Table 722.135(B) and installed in accordance with 300.22(B), Exception shall be permitted to be installed in ducts specifically fabricated for environmental air. Exception No. 2: Cables selected in accordance with Table 722.135(B) shall be permitted to be installed in other spaces used for environmental air (plenums). [722.3(C)](https://2023.antflix.net#722.3(C)) | https://2023.antflix.net#722.3(C) |
Chapter 7 Special Conditions | 722.3(D) | Section 300.22(A) for wiring systems shall apply. Exception: Nonconductive optical fiber cables shall be permitted in ducts used for dust, loose stock, or vapor removal. [722.3(D)](https://2023.antflix.net#722.3(D)) | https://2023.antflix.net#722.3(D) |
Chapter 7 Special Conditions | 722.3(E) | Cable tray installations shall comply with Parts I and II of Article 392. [722.3(E)](https://2023.antflix.net#722.3(E)) | https://2023.antflix.net#722.3(E) |
Chapter 7 Special Conditions | 722.3(F) | Circuits wired using instrumentation tray cable shall comply with 335.1 and 335.4 through 335.9. [722.3(F)](https://2023.antflix.net#722.3(F)) | https://2023.antflix.net#722.3(F) |
Chapter 7 Special Conditions | 722.3(G) | Section 300.7(A) shall apply. [722.3(G)](https://2023.antflix.net#722.3(G)) | https://2023.antflix.net#722.3(G) |
Chapter 7 Special Conditions | 722.3(H) | Vertical installations of circuit integrity (CI) cables and conductors installed in a raceway or conductors and cables of electrical circuit protective systems and fire resistive-cable systems shall be installed in accordance with 300.19. [722.3(H)](https://2023.antflix.net#722.3(H)) | https://2023.antflix.net#722.3(H) |
Chapter 7 Special Conditions | 722.3(I) | Section 300.8 shall apply. [722.3(I)](https://2023.antflix.net#722.3(I)) | https://2023.antflix.net#722.3(I) |
Chapter 7 Special Conditions | 722.3(J) | The installation of power-limited cables shall comply with the applicable requirements in 110.11, 300.5(B), 300.6, 300.9, and 310.10(F) when installed in corrosive, damp, or wet locations. [722.3(J)](https://2023.antflix.net#722.3(J)) | https://2023.antflix.net#722.3(J) |
Chapter 7 Special Conditions | 722.3(K) | Cables installed in cable routing assemblies shall be selected in accordance with Table 800.154(c), listed in accordance with 800.182, and installed in accordance with 800.110(C)(1)), 800.110(C)(2), and 800.113. [722.3(K)](https://2023.antflix.net#722.3(K)) | https://2023.antflix.net#722.3(K) |
Chapter 7 Special Conditions | 722.3(L) | Cables communications raceways shall be selected in accordance with Table 800.154(b), listed in accordance with 800.182, and installed in accordance with 800.113 and 362.24 through 362.56, where the requirements applicable to electrical nonmetallic tubing (ENT) apply. [722.3(L)](https://2023.antflix.net#722.3(L)) | https://2023.antflix.net#722.3(L) |
Chapter 7 Special Conditions | 722.3(M) | The requirements of 310.14(A)(3) on the temperature limitation of conductors shall apply to power-limited circuit cables and fault-managed power cables. [722.3(M)](https://2023.antflix.net#722.3(M)) | https://2023.antflix.net#722.3(M) |
Chapter 7 Special Conditions | 722.3(N) | Equipment grounding conductors shall be identified in accordance with 250.119. Exception: Cables that do not contain an equipment grounding conductor shall be permitted to use a conductor with green insulation, or green insulation with one or more yellow stripes, for other than equipment grounding purposes. [722.3(N)](https://2023.antflix.net#722.3(N)) | https://2023.antflix.net#722.3(N) |
Chapter 7 Special Conditions | 722.3(O) | As appropriate, the installation of wires and cables shall also comply with the following: Class 2 and Class 3 cables - Part II of Article 725Class 4 cables - Part IV of Article 726Fire alarm cables - Part III of Article 760Optical fiber cables - Part V of Article 770 [722.3(O)](https://2023.antflix.net#722.3(O)) | https://2023.antflix.net#722.3(O) |
Chapter 7 Special Conditions | 722.10 | Class 4 cables shall be permitted to be used in hazardous (classified) locations where specifically permitted by other articles of this Code. [722.10](https://2023.antflix.net#722.10) | https://2023.antflix.net#722.10 |
Chapter 7 Special Conditions | 722.12 | Class 4 cables shall not be permitted for any applications that are not part of a Class 4 system. Exception: Use of Class 4 cable for other applications shall be permitted if the cable has been listed as suitable for the other applications. [722.12](https://2023.antflix.net#722.12) | https://2023.antflix.net#722.12 |
Chapter 7 Special Conditions | 722.21 | Access to electrical equipment shall not be denied by an accumulation of cables that prevents removal of panels, including suspended ceiling panels. [722.21](https://2023.antflix.net#722.21) | https://2023.antflix.net#722.21 |
Chapter 7 Special Conditions | 722.24(A) | 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, hangers, listed cable ties identified for securement and support, or similar fittings, designed and installed so as not to damage the cable. The installation shall conform to 300.4 and 300.11. A bushing shall be installed where cables emerge from raceway used for mechanical support or protection in accordance with 300.15(C). Nonmetallic 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 300.22(C). Informational Note No. 1: See NFPA 90A-2021, Standard for the Installation of Air-Conditioning and Ventilating Systems, for discrete combustible components. Informational Note No. 2: Paint, plaster, cleaners, abrasives, corrosive residues, or other contaminants could result in an undetermined alteration of cable properties. [722.24(A)](https://2023.antflix.net#722.24(A)) | https://2023.antflix.net#722.24(A) |
Chapter 7 Special Conditions | 722.24(B) | Cables shall not be strapped, taped, or attached by any means to the exterior of any conduit or other raceway as a means of support. Exception No. 1: Class 2 circuit conductors or cables shall be permitted to be installed as permitted by 300.11(C)(2). Exception No. 2: Overhead (aerial) spans of optical fiber cables shall be permitted to be attached to the exterior of a raceway-type mast intended for the attachment and support of such cables. [722.24(B)](https://2023.antflix.net#722.24(B)) | https://2023.antflix.net#722.24(B) |
Chapter 7 Special Conditions | 722.24(C) | 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. [722.24(C)](https://2023.antflix.net#722.24(C)) | https://2023.antflix.net#722.24(C) |
Chapter 7 Special Conditions | 722.25 | The accessible portion of abandoned 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. [722.25](https://2023.antflix.net#722.25) | https://2023.antflix.net#722.25 |
Chapter 7 Special Conditions | 722.31 | 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 using Class 1 circuit wiring methods in accordance with 724.46. All conductors of such circuits shall be installed in rigid metal conduit, intermediate metal conduit, rigid nonmetallic conduit, electrical metallic tubing, Type MI cable, or Type MC cable, or be otherwise suitably protected from physical damage. [722.31](https://2023.antflix.net#722.31) | https://2023.antflix.net#722.31 |
Chapter 7 Special Conditions | 722.135 | The installation of cables shall comply with 722.135(A) through (I), as applicable. [722.135](https://2023.antflix.net#722.135) | https://2023.antflix.net#722.135 |
Chapter 7 Special Conditions | 722.135(A) | Cables installed in buildings shall be listed. [722.135(A)](https://2023.antflix.net#722.135(A)) | https://2023.antflix.net#722.135(A) |
Chapter 7 Special Conditions | 722.135(B) | The installation of cables shall comply with Table 722.135(B). Informational Note No. 1: See NFPA 90A-2021, Standard for the Installation of Air-Conditioning and Ventilating Systems, 4.3.4 and 4.3.11.3.3, for information on fire protection of wiring installed in ducts specifically fabricated for environmental air and other spaces used for environmental air (plenums). Informational Note No. 2: See 300.21 for firestop requirements for floor penetrations. Informational Note No. 3: See Chapter 3 for the installation requirements for PLTC cables installed outdoors in cable trays. Informational Note No. 4: See UL 2024, Cable Routing Assemblies and Communications Raceways, for applicable requirements for plenum, riser, and general-purpose cable routing assemblies and raceways. [722.135(B)](https://2023.antflix.net#722.135(B)) | https://2023.antflix.net#722.135(B) |
Chapter 7 Special Conditions | 722.135(C) | In industrial establishments where the conditions of maintenance and supervision ensure that only qualified persons service the installation, Type PLTC cable shall be permitted in accordance with either of the following: Where the cable is not subject to physical damage, Type PLTC cable that complies with the crush and impact requirements of Type MC cable and is identified as Type PITC-ER for such use shall be permitted to be exposed between the cable tray and the utilization equipment or device. The cable shall be continuously supported and protected against physical damage using mechanical protection such as dedicated struts, angles, or channels. The cable shall be supported and secured at intervals not exceeding 1.8 m (6 ft). Where not subject to physical damage, Type PLTC-ER cable shall be permitted to transition between cable trays and between cable trays and utilization equipment or devices for a distance not to exceed 1.8 m (6 ft) without continuous support. The cable shall be mechanically supported where exiting the cable tray to ensure that the minimum bending radius is not exceeded.Type PLTC cable, with a metallic sheath or armor in accordance with 722.179(A)(6), shall be permitted to be installed exposed. The cable shall be continuously supported and protected against physical damage using mechanical protection such as dedicated struts, angles, or channels. The cable shall be secured at intervals not exceeding 1.8 m (6 ft). [722.135(C)](https://2023.antflix.net#722.135(C)) | https://2023.antflix.net#722.135(C) |
Chapter 7 Special Conditions | 722.135(D) | In hoistways, cables 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. [722.135(D)](https://2023.antflix.net#722.135(D)) | https://2023.antflix.net#722.135(D) |
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