Chapter stringclasses 6 values | Reference stringlengths 1 17 | Body stringlengths 62 23.1k | URL stringlengths 26 42 |
|---|---|---|---|
Chaptewr 5 Special Occupancies | 517.34(B) | It shall be permitted to control task illumination on the critical branch. [517.34(B)](https://2023.antflix.net#517.34(B)) | https://2023.antflix.net#517.34(B) |
Chaptewr 5 Special Occupancies | 517.34(C) | The critical branch shall be permitted to be subdivided into two or more branches. [99:6.7.5.1.3.1] Informational Note: It is important to analyze the consequences of supplying an area with only critical branch power when failure occurs between the area and the transfer switch. Some proportion of normal and critical power or critical power from separate transfer switches might be appropriate. [517.34(C)](https://2023.antflix.net#517.34(C)) | https://2023.antflix.net#517.34(C) |
Chaptewr 5 Special Occupancies | 517.35 | The equipment branch shall be installed and connected to the alternate power source such that the equipment described in 517.35(A) is automatically restored to operation at appropriate time-lag intervals following the energizing of the life safety and critical branches. [99:6.7.5.1.4.2(A)] The arrangement of the connection to the alternate power source shall also provide for the subsequent connection of equipment described in 517.35(B). [99:6.7.5.1.4.2(B)] Exception: For essential electrical systems under 150 kVA, deletion of the time-lag intervals feature for delayed automatic connection to the equipment system shall be permitted. [517.35](https://2023.antflix.net#517.35) | https://2023.antflix.net#517.35 |
Chaptewr 5 Special Occupancies | 517.35(A) | The following equipment shall be permitted to be arranged for delayed automatic connection to the alternate power source: Central suction systems serving medical and surgical functions, including controls, with such suction systems permitted to be placed on the critical branchSump pumps and other equipment required to operate for the safety of major apparatus, including associated control systems and alarmsCompressed air systems serving medical and surgical functions, including controls with such air systems permitted to be placed on the critical branchSmoke control and stair pressurization systemsKitchen hood supply or exhaust systems, or both, if required to operate during a fire in or under the hoodSupply, return, and exhaust ventilating systems for the following:Airborne infectious/isolation roomsProtective environment roomsExhaust fans for laboratory fume hoodsNuclear medicine areas where radioactive material is usedEthylene oxide evacuationAnesthetic evacuation[99:6.7.5.1.4.3(A)]Where delayed automatic connection is not appropriate, the ventilation systems specified in 517.35(A)(6) shall be permitted to be placed on the critical branch. [99:6.7.5.1.4.3(B)]Supply, return, and exhaust ventilating systems for operating and delivery roomsSupply, return, exhaust ventilating systems and/or air-conditioning systems serving telephone equipment rooms and closets and data equipment rooms and closetsException: Sequential delayed automatic connection to the alternate power source to prevent overloading the generator shall be permitted where engineering studies indicate it is necessary. [517.35(A)](https://2023.antflix.net#517.35(A)) | https://2023.antflix.net#517.35(A) |
Chaptewr 5 Special Occupancies | 517.35(B) | The following equipment shall be permitted to be arranged for either delayed automatic or manual connection to the alternate power source: Heating equipment to provide heating for operating, delivery, labor, recovery, intensive care, coronary care, nurseries, infection/isolation rooms, emergency treatment spaces, and general patient rooms and pressure maintenance (jockey or make-up) pump(s) for water-based fire protection systemsException: Healing of general patient rooms and infection/isolation rooms during disruption of the normal source shall not be required under any of the following conditions:The outside design temperature is higher than —6.7°C (20°F).The outside design temperature is lower than —6.7°C (20°F), and where a selected room(s) is provided for the needs of all confined patients, only such room(s) need be heated.The facility is served by a dual source of normal power.Informational Note No. 1: The design temperature is based on the 97.5 percent design value as shown in Chapter 24 of the ASHRAE Handbook of Fundamentals (2013).Informational Note No. 2: See 517.30(C) for a description of a dual source of normal power.An elevator(s) selected to provide service to patient, surgical, obstetrical, and ground floors during interruption of normal power. In instances where interruption of normal power would result in other elevators stopping between floors, throw-over facilities shall be provided to allow the temporary operation of any elevator for the release of patients or other persons who may be confined between floors.Hyperbaric facilities.Hypobaric facilities.Automatically operated doors.Minimal electrically heated autoclaving equipment shall be permitted to be arranged for either automatic or manual connection to the alternate source.Controls for equipment listed in 517.35.Other selected equipment shall be permitted to be served by the equipment system. [99:6.7.5.1.4.4] [517.35(B)](https://2023.antflix.net#517.35(B)) | https://2023.antflix.net#517.35(B) |
Chaptewr 5 Special Occupancies | 517.40 | Informational Note No. 1: Nursing homes and other limited care facilities can contain Category 1 and/or Category 2 patient care spaces, depending on the design and type of care administered in the facility. For Category 1 spaces, see 517.29 through 517.35. For Category 2 spaces not served by Type 1 essential electrical systems, see 517.40 through 517.44. Informational Note No. 2: Type 2 essential electrical systems are comprised of two separate branches capable of supplying a limited amount of lighting and power service that is considered essential for the protection of life and safety and effective operation of the institution during the time normal electrical service is interrupted for any reason. These two separate branches are the life safety and equipment branches. The number of transfer switches to be used should be based upon reliability, design, and load considerations. Each branch of the essential electrical system should have one or more transfer switches. One transfer switch should be permitted to serve one or more branches in a facility with a maximum demand on the essential electrical system of 150 kVA (120 kW). [99:A.6.7.6.2.1] [517.40](https://2023.antflix.net#517.40) | https://2023.antflix.net#517.40 |
Chaptewr 5 Special Occupancies | 517.40(A) | The requirements of 517.40(C) through 517.44 shall apply to Category 2 spaces. Exception: The requirements of 517.40(C) through 517.44 shall not apply to freestanding buildings used as nursing homes and limited care facilities if the following apply: (1) Admitting and discharge policies are maintained that preclude the provision of care for any patient or resident who might need to be sustained by electrical life-support equipment. (2) No surgical treatment requiring general anesthesia is offered. (3) An automatic battery-operated system(s) or equipment shall be effective for at least 11/2 hours and is otherwise in accordance with 700.12 and that shall be capable of supplying lighting for exit lights, exit corridors, stairways, nursing stations, medical preparation areas, boiler rooms, and communications areas. This system shall also supply power to operate all alarm systems. Informational Note: See NFPA 101-2021, Life Safety Code. [517.40(A)](https://2023.antflix.net#517.40(A)) | https://2023.antflix.net#517.40(A) |
Chaptewr 5 Special Occupancies | 517.40(B) | For those nursing homes and limited care facilities that admit patients who need to be sustained by electrical life-support equipment, the essential electrical system from the source to the portion of the facility where such patients are treated shall comply with the requirements of 517.29 through 517.35. [517.40(B)](https://2023.antflix.net#517.40(B)) | https://2023.antflix.net#517.40(B) |
Chaptewr 5 Special Occupancies | 517.40(C) | Nursing homes and limited care facilities that are contiguous or located on the same site with a hospital shall be permitted to have their essential electrical systems supplied by the hospital. [517.40(C)](https://2023.antflix.net#517.40(C)) | https://2023.antflix.net#517.40(C) |
Chaptewr 5 Special Occupancies | 517.41(A) | Essential electrical systems (EES) shall have two or more independent sources (or sets of sources). One on-site source (or sets of sources) shall be sized to supply the entire EES. The other independent source (or sets of sources) shall be sized to supply the entire EES and shall be permitted to be located on-site or off-site. Additional sources other than the first two independent sources shall be permitted to be sized to supply the intended load. Informational Note: An example of a set of sources may be several generators that combined serve the entire EES. [517.41(A)](https://2023.antflix.net#517.41(A)) | https://2023.antflix.net#517.41(A) |
Chaptewr 5 Special Occupancies | 517.41(B) | EES components shall be located to minimize interruptions caused by natural forces common to the area (e.g., storms, floods, earthquakes, or hazards created by adjoining structures or activities). [99:6.2.4.1] Installations of electrical services shall be located to reduce possible interruption of normal electrical services resulting from similar causes as well as possible disruption of normal electrical service due to internal wiring and equipment failures. [99:6.2.4.2] Feeders shall be located to provide physical separation of the feeders of the alternate source and from the feeders of the normal electrical source to prevent possible simultaneous interruption. [99:6.2.4.3] [517.41(B)](https://2023.antflix.net#517.41(B)) | https://2023.antflix.net#517.41(B) |
Chaptewr 5 Special Occupancies | 517.42(A) | The [Type 2] essential electrical system shall be divided into the following two branches: Life safety branchEquipment branch [99:6.7.6.2.1.2]The division between the branches shall occur at transfer switches where more than one transfer switch is required. [99:6.7.2.2.1]Informational Note No. 1: Type 2 essential electrical systems are comprised of two separate branches capable of supplying a limited amount of lighting and power service that is considered essential for the protection of life and safety and effective operation of the institution during the time normal electrical service is interrupted for any reason. These two separate branches are the life safety and equipment branches. [99:A.6.7.6.2.1]Informational Note No. 2: The number of transfer switches to be used should be based upon reliability, design, and load considerations. Each branch of the essential electrical system should have one or more transfer switches. One transfer switch should be permitted to serve one or more branches in a facility with a maximum demand on the essential electrical system of 150 kVA (120 kW). [99:A.6.7.6.2.1]Informational Note No. 3: See NFPA 99-2021, Health Care Facilities Code, 6.7.2.2, for more information. [517.42(A)](https://2023.antflix.net#517.42(A)) | https://2023.antflix.net#517.42(A) |
Chaptewr 5 Special Occupancies | 517.42(B) | The number of transfer switches to be used shall be based upon reliability, design, and load considerations. [99:6.7.2.2.3] Transfer switches shall be in accordance with one of the following:Each branch of the essential electrical system shall have one or more transfer switches. [99:6.7.2.2.3.1]One transfer switch shall be permitted to serve one or more branches in a facility with a continuous load on the switch of 150 kVA (120 kW) or less. [99:6.7.2.2.3.2]Informational Note No. 1: See NFPA 99-2021, Health Care Facilities Code, 6.7.2.2.4, 6.7.2.2.5, 6.7.2.2.5.15, and 6.7.2.2.7 for more information on transfer switches.Informational Note No. 2: See Informational Note Figure 517.42(B)(1).Informational Note No. 3: See Informational Note Figure 517.42(B)(2).Informational Note Figure 517.42(B)(1) Type 2 Essential Electrical Systems (Nursing Home and Limited Health Care Facilities) - Minimum Requirement (Greater Than 150 kVA) for Transfer Switch Arrangement.Informational Note Figure 517.42(B)(2) Type 2 Essential Electrical Systems (Nursing Home and Limited Health Care Facilities) - Minimum Requirement (150 kVA or Less) for Transfer Switch Arrangement. [517.42(B)](https://2023.antflix.net#517.42(B)) | https://2023.antflix.net#517.42(B) |
Chaptewr 5 Special Occupancies | 517.42(C) | The essential electrical system shall have capacity to meet the demand for the operation of all functions and equipment to be served by each branch at one time. [517.42(C)](https://2023.antflix.net#517.42(C)) | https://2023.antflix.net#517.42(C) |
Chaptewr 5 Special Occupancies | 517.42(D) | The life safety branch and equipment branch shall be kept entirely independent of all other wiring and equipment. [99:6.7.6.3.1] These circuits shall not enter the same raceways, boxes, or cabinets with other wiring except as follows:In transfer switchesIn exit or emergency luminaires supplied from two sourcesIn a common junction box attached to exit or emergency luminaires supplied from two sources [517.42(D)](https://2023.antflix.net#517.42(D)) | https://2023.antflix.net#517.42(D) |
Chaptewr 5 Special Occupancies | 517.42(E) | The electrical receptacles or the cover plates for the electrical receptacles supplied from the life safety or equipment branches shall have a distinctive color or marking so as to be readily identifiable. [99:6.7.6.3.2] Informational Note: If color is used to identify these receptacles, the same color should be used throughout the facility. [99:A.6.7.6.3.2] [517.42(E)](https://2023.antflix.net#517.42(E)) | https://2023.antflix.net#517.42(E) |
Chaptewr 5 Special Occupancies | 517.43 | The life safety and equipment branches shall be installed and connected to the alternate source of power specified in 517.41 so that all functions specified herein for the life safety and equipment branches are automatically restored to operation within 10 seconds after interruption of the normal source. [99:6.7.6.4.1] No functions other than those listed in 517.43(A) through (G) shall be connected to the life safety branch. [99:6.7.6.2.1.5(D)] The life safety branch shall supply power as follows: [517.43](https://2023.antflix.net#517.43) | https://2023.antflix.net#517.43 |
Chaptewr 5 Special Occupancies | 517.43(A) | Illumination of means of egress as is necessary for corridors, passageways, stairways, landings, and exit doors and all ways of approach to exits. Switching arrangement to transfer patient corridor lighting from general illumination circuits shall be permitted if only one of two circuits can be selected and both circuits cannot be extinguished at the same time. Informational Note: See NFPA 101-2021, Life Safety Code, Sections 7.8 and 7.9. [517.43(A)](https://2023.antflix.net#517.43(A)) | https://2023.antflix.net#517.43(A) |
Chaptewr 5 Special Occupancies | 517.43(B) | Exit signs and exit directional signs. Informational Note: See NFPA 101-2021, Life Safety Code, Section 7.10. [517.43(B)](https://2023.antflix.net#517.43(B)) | https://2023.antflix.net#517.43(B) |
Chaptewr 5 Special Occupancies | 517.43(C) | Alarm and alerting systems, including the following: Fire alarmsInformational Note No. 1: See NFPA 101-2021, Life Safety Code, Sections 9.6 and 18.3.4.Alarms required for systems used for the piping of nonflammable medical gasesInformational Note No. 2: See NFPA 99-2021, Health Care Facilities Code, 6.7.5.1.2.5. [517.43(C)](https://2023.antflix.net#517.43(C)) | https://2023.antflix.net#517.43(C) |
Chaptewr 5 Special Occupancies | 517.43(D) | Communications systems, where used for issuing instructions during emergency conditions. [99:6.7.5.1.2.4(3)] [517.43(D)](https://2023.antflix.net#517.43(D)) | https://2023.antflix.net#517.43(D) |
Chaptewr 5 Special Occupancies | 517.43(E) | Task illumination and select receptacles at the generator set location and essential electrical system transfer switch locations. [517.43(E)](https://2023.antflix.net#517.43(E)) | https://2023.antflix.net#517.43(E) |
Chaptewr 5 Special Occupancies | 517.43(F) | Elevator cab lighting, control, communications, and signal systems. [99:6.7.5.1.2.4(5)] [517.43(F)](https://2023.antflix.net#517.43(F)) | https://2023.antflix.net#517.43(F) |
Chaptewr 5 Special Occupancies | 517.43(G) | Generator accessories, including, but not limited to, the transfer fuel pump, electrically operated louvers, and other generator accessories essential for generator operation shall be arranged for automatic connection to the alternate power source. [99:6.7.6.2.1.6(C)] [517.43(G)](https://2023.antflix.net#517.43(G)) | https://2023.antflix.net#517.43(G) |
Chaptewr 5 Special Occupancies | 517.44 | The equipment branch shall be installed and connected to the alternate power source such that equipment described in 517.35(A)(6) is automatically restored to operation at appropriate time-lag intervals following the energizing of the life safety and critical branches. [99:6.7.5.1.4.2(A)] The equipment branch arrangement shall also provide for the additional connection of equipment listed in 517.44(B). Exception: For essential electrical systems under 150 kVA, deletion of the time-lag intervals feature for delayed automatic connection to the equipment branch shall be permitted. [517.44](https://2023.antflix.net#517.44) | https://2023.antflix.net#517.44 |
Chaptewr 5 Special Occupancies | 517.44(A) | The following equipment shall be permitted to be connected to the equipment branch and shall be arranged for delayed automatic connection to the alternate power source: Task illumination and select receptacles in the following: [99:6.7.6.2.1.6(D)(1)]Patient care spaces [99:6.7.6.2.1.6(D)(1)(a)]Medication preparation spaces [99:6.7.6.2.1.6(D)(1)(b)]Pharmacy dispensing space [99:6.7.6.2.1.6(D)(1)(c)]Nurses' stations - unless adequately lighted by corridor luminaires [99:6.7.6.2.1.6(D)(1)(d)]Supply, return, and exhaust ventilating systems for airborne infectious isolation rooms [99:6.7.6.2.1.6(D)(2)]Sump pumps and other equipment required to operate for the safety of major apparatus and associated control systems and alarms [99:6.7.6.2.1.6(D)(3)]Smoke control and stair pressurization systems [99:6.7.6.2.1.6(D)(4)]Kitchen hood supply or exhaust systems, or both, if required to operate during a fire in or under the hood [99:6.7.6.2.1.6(D)(5)]Nurse call systems [99:6.7.6.2.1.6(D)(6)] [517.44(A)](https://2023.antflix.net#517.44(A)) | https://2023.antflix.net#517.44(A) |
Chaptewr 5 Special Occupancies | 517.44(B) | The equipment specified in 517.44(B)(1) through (B)(4) shall be permitted to be connected to the equipment branch and shall be arranged for either delayed-automatic or manual connection to the alternate power source. [517.44(B)](https://2023.antflix.net#517.44(B)) | https://2023.antflix.net#517.44(B) |
Chaptewr 5 Special Occupancies | 517.44(B)(1) | Heating of general patient rooms during disruption of the normal source shall not be required under any of the following conditions: The outside design temperature is higher than —6.7°C (20°F).The outside design temperature is lower than —6.7°C (20°F) and, where a selected room(s) is provided for the needs of all confined patients, then only such room(s) need be heated.The facility is served by a dual source of normal power as described in 517.30(C), Informational Note.Informational Note: The outside design temperature is based on the 97.5 percent design values, as shown in Chapter 24 of the ASHRAE Handbook of Fundamentals (2013). [517.44(B)(1)](https://2023.antflix.net#517.44(B)(1)) | https://2023.antflix.net#517.44(B)(1) |
Chaptewr 5 Special Occupancies | 517.44(B)(2) | In instances where interruptions of power would result in elevators stopping between floors, throw-over facilities shall be provided to allow the temporary operation of any elevator for the release of passengers. [517.44(B)(2)](https://2023.antflix.net#517.44(B)(2)) | https://2023.antflix.net#517.44(B)(2) |
Chaptewr 5 Special Occupancies | 517.44(B)(3) | Additional illumination, receptacles, and equipment shall be permitted to be connected only to the equipment branch. [517.44(B)(3)](https://2023.antflix.net#517.44(B)(3)) | https://2023.antflix.net#517.44(B)(3) |
Chaptewr 5 Special Occupancies | 517.44(B)(4) | Where one switch serves multiple systems as permitted in 517.43, transfer for all loads shall be nondelayed automatic. [99:6.7.6.2.1.6(E)] Informational Note: See 517.43(G) for elevator cab lighting, control, and signal system requirements. [99:A.6.7.6.2.1.6(E)(2)] [517.44(B)(4)](https://2023.antflix.net#517.44(B)(4)) | https://2023.antflix.net#517.44(B)(4) |
Chaptewr 5 Special Occupancies | 517.45(A) | If required by the governing body, the essential electrical distribution system for Category 3 patient care spaces shall be comprised of an alternate power system capable of supplying a limited amount of lighting and power service for the orderly cessation of procedures during a time normal electrical service is interrupted. Informational Note: See NFPA 99-2021, Health Care Facilities Code. [517.45(A)](https://2023.antflix.net#517.45(A)) | https://2023.antflix.net#517.45(A) |
Chaptewr 5 Special Occupancies | 517.45(B) | Where electrical life support equipment is required, the essential electrical distribution system shall be as described in 517.29 through 517.30. [517.45(B)](https://2023.antflix.net#517.45(B)) | https://2023.antflix.net#517.45(B) |
Chaptewr 5 Special Occupancies | 517.45(C) | Where Category 1 patient care spaces are present, the essential electrical distribution system shall be in accordance with 517.29 through 517.30. [517.45(C)](https://2023.antflix.net#517.45(C)) | https://2023.antflix.net#517.45(C) |
Chaptewr 5 Special Occupancies | 517.45(D) | Where Category 2 patient care spaces are present, the essential electrical distribution system shall be in accordance with 517.40 through 517.45. [517.45(D)](https://2023.antflix.net#517.45(D)) | https://2023.antflix.net#517.45(D) |
Chaptewr 5 Special Occupancies | 517.45(E) | If required, alternate power sources acceptable to the governing body shall comply with the requirements of NFPA 99-2021, Health Care Facilities Code. [517.45(E)](https://2023.antflix.net#517.45(E)) | https://2023.antflix.net#517.45(E) |
Chaptewr 5 Special Occupancies | divider_21_IV | Informational Note: See NFPA 99-2021, Health Care Facilities Code, for further information regarding safeguards for anesthetizing locations. [divider_21_IV](https://2023.antflix.net#divider_21_IV) | https://2023.antflix.net#divider_21_IV |
Chaptewr 5 Special Occupancies | 517.60 | Informational Note: See 517.20 if either of the anesthetizing locations in 517.60(A) or 517.60(B) is designated a wet procedure location. [517.60](https://2023.antflix.net#517.60) | https://2023.antflix.net#517.60 |
Chaptewr 5 Special Occupancies | 517.60(A)(1) | In a location where flammable anesthetics are employed, the entire area shall be considered to be a Class I, Division 1 location that extends upward to a level 1.52 m (5 ft) above the floor. The remaining volume up to the structural ceiling is considered to be above a hazardous (classified) location. [517.60(A)(1)](https://2023.antflix.net#517.60(A)(1)) | https://2023.antflix.net#517.60(A)(1) |
Chaptewr 5 Special Occupancies | 517.60(A)(2) | Any room or location in which flammable anesthetics or volatile flammable disinfecting agents are stored shall be considered to be a Class I, Division 1 location from floor to ceiling. [517.60(A)(2)](https://2023.antflix.net#517.60(A)(2)) | https://2023.antflix.net#517.60(A)(2) |
Chaptewr 5 Special Occupancies | 517.60(B) | Any inhalation anesthetizing location designated for the exclusive use of nonflammable anesthetizing agents shall be considered to be an unclassified location. [517.60(B)](https://2023.antflix.net#517.60(B)) | https://2023.antflix.net#517.60(B) |
Chaptewr 5 Special Occupancies | 517.61(A)(1) | Except as permitted in 517.160, each power circuit within, or partially within, a flammable anesthetizing location as referred to in 517.60 shall be isolated from any distribution system by the use of an isolated power system. [517.61(A)(1)](https://2023.antflix.net#517.61(A)(1)) | https://2023.antflix.net#517.61(A)(1) |
Chaptewr 5 Special Occupancies | 517.61(A)(2) | Where an isolated power system is utilized, the isolated power equipment shall be listed as isolated power equipment, and the isolated power system shall be designed and installed in accordance with 517.160. [517.61(A)(2)](https://2023.antflix.net#517.61(A)(2)) | https://2023.antflix.net#517.61(A)(2) |
Chaptewr 5 Special Occupancies | 517.61(A)(3) | In hazardous (classified) locations referred to in 517.60, all fixed wiring and equipment and all portable equipment, including lamps and other utilization equipment, operating at more than 10 volts between conductors shall comply with the requirements of 501.1 through 501.25, and 501.100 through 501.150, and 501.30(A) and (B) for Class I, Division 1 locations. All such equipment shall be specifically approved for the hazardous atmospheres involved. [517.61(A)(3)](https://2023.antflix.net#517.61(A)(3)) | https://2023.antflix.net#517.61(A)(3) |
Chaptewr 5 Special Occupancies | 517.61(A)(4) | Where a box, fitting, or enclosure is partially, but not entirely, within a hazardous (classified) location(s), the hazardous (classified) location(s) shall be considered to be extended to include the entire box, fitting, or enclosure. [517.61(A)(4)](https://2023.antflix.net#517.61(A)(4)) | https://2023.antflix.net#517.61(A)(4) |
Chaptewr 5 Special Occupancies | 517.61(A)(5) | Receptacles and attachment plugs in a hazardous (classified) location(s) shall be listed for use in Class I, Group C hazardous (classified) locations and shall have provision for the connection of an equipment grounding conductor. [517.61(A)(5)](https://2023.antflix.net#517.61(A)(5)) | https://2023.antflix.net#517.61(A)(5) |
Chaptewr 5 Special Occupancies | 517.61(A)(6) | Flexible cords used in hazardous (classified) locations for connection to portable utilization equipment, including lamps operating at more than 8 volts between conductors, shall be of a type approved for extra-hard usage in accordance with Table 400.4 and shall include an additional equipment grounding conductor. [517.61(A)(6)](https://2023.antflix.net#517.61(A)(6)) | https://2023.antflix.net#517.61(A)(6) |
Chaptewr 5 Special Occupancies | 517.61(A)(7) | A storage device for the flexible cord shall be provided and shall not subject the cord to bending at a radius of less than 75 mm (3 in.). [517.61(A)(7)](https://2023.antflix.net#517.61(A)(7)) | https://2023.antflix.net#517.61(A)(7) |
Chaptewr 5 Special Occupancies | 517.61(B)(1) | Wiring above a hazardous (classified) location referred to in 517.60 shall be installed in rigid metal conduit, electrical metallic tubing, intermediate metal conduit, Type MI cable, or Type MC cable that employs a continuous, gas/vaportight metal sheath. [517.61(B)(1)](https://2023.antflix.net#517.61(B)(1)) | https://2023.antflix.net#517.61(B)(1) |
Chaptewr 5 Special Occupancies | 517.61(B)(2) | Installed equipment that may produce arcs, sparks, or particles of hot metal, such as lamps and lampholders for fixed lighting, cutouts, switches, generators, motors, or other equipment having make-and-break or sliding contacts, shall be of the totally enclosed type or be constructed so as to prevent escape of sparks or hot metal particles. Exception: Wall-mounted receptacles installed above the hazardous (classified) location in flammable anesthetizing locations shall not be required to be totally enclosed or have openings guarded or screened to prevent dispersion of particles. [517.61(B)(2)](https://2023.antflix.net#517.61(B)(2)) | https://2023.antflix.net#517.61(B)(2) |
Chaptewr 5 Special Occupancies | 517.61(B)(3) | Surgical and other luminaires shall conform to 501.130(B). Exception No. 1: The surface temperature limitations set forth in 501.130(B)(1) shall not apply. Exception No. 2: Integral or pendant switches that are located above and cannot be lowered into the hazardous (classified) location(s) shall not be required to be explosionproof. [517.61(B)(3)](https://2023.antflix.net#517.61(B)(3)) | https://2023.antflix.net#517.61(B)(3) |
Chaptewr 5 Special Occupancies | 517.61(B)(4) | Listed seals shall be provided in conformance with 501.15, and 501.15(A)(4) shall apply to horizontal as well as to vertical boundaries of the defined hazardous (classified) locations. [517.61(B)(4)](https://2023.antflix.net#517.61(B)(4)) | https://2023.antflix.net#517.61(B)(4) |
Chaptewr 5 Special Occupancies | 517.61(B)(5) | Receptacles and attachment plugs located above hazardous (classified) anesthetizing locations shall be listed for hospital use for services of prescribed voltage, frequency, rating, and number of conductors with provision for the connection of the equipment grounding conductor. This requirement shall apply to attachment plugs and receptacles of the 2-pole, 3-wire grounding type for single-phase, 120-volt, nominal, ac service. [517.61(B)(5)](https://2023.antflix.net#517.61(B)(5)) | https://2023.antflix.net#517.61(B)(5) |
Chaptewr 5 Special Occupancies | 517.61(B)(6) | Receptacles and attachment plugs rated 250 volts, for connection of 50-ampere and 60-ampere ac medical equipment for use above hazardous (classified) locations, shall be arranged so that the 60-ampere receptacle will accept either the 50-ampere or the 60-ampere plug. Fifty-ampere receptacles shall be designed so as not to accept the 60-ampere attachment plug. The attachment plugs shall be of the 2-pole, 3-wire design with a third contact connecting to the insulated (green or green with yellow stripe) equipment grounding conductor of the electrical system. [517.61(B)(6)](https://2023.antflix.net#517.61(B)(6)) | https://2023.antflix.net#517.61(B)(6) |
Chaptewr 5 Special Occupancies | 517.61(C)(1) | Wiring serving unclassified locations, as defined in 517.60, shall be installed in a metal raceway system or cable assembly. The metal raceway system or cable armor or sheath assembly shall qualify as an equipment grounding conductor in accordance with 250.118. Type MC and Type MI cable shall have an outer metal armor, sheath, or sheath assembly that is identified as an equipment grounding conductor. Exception: Pendant receptacle installations that employ listed Type SJO or equivalent hard usage or extra-hard usage, flexible cords suspended not less than 1.8 m (6 ft) from the floor shall not be required, to be installed in a metal raceway or cable assembly. [517.61(C)(1)](https://2023.antflix.net#517.61(C)(1)) | https://2023.antflix.net#517.61(C)(1) |
Chaptewr 5 Special Occupancies | 517.61(C)(2) | Receptacles and attachment plugs installed and used in unclassified locations shall be listed "hospital grade" for services of prescribed voltage, frequency, rating, and number of conductors with provision for connection of the equipment grounding conductor. This requirement shall apply to 2-pole, 3-wire grounding type for single-phase, 120-, 208-, or 240-volt, nominal, ac service. [517.61(C)(2)](https://2023.antflix.net#517.61(C)(2)) | https://2023.antflix.net#517.61(C)(2) |
Chaptewr 5 Special Occupancies | 517.61(C)(3) | Receptacles and attachment plugs rated 250 volts, for connection of 50-ampere and 60-ampere ac medical equipment for use in unclassified locations, shall be arranged so that the 60-ampere receptacle will accept either the 50-ampere or the 60-ampere plug. Fifty-ampere receptacles shall be designed so as not to accept the 60-ampere attachment plug. The attachment plugs shall be of the 2-pole, 3-wire design with a third contact connecting to the insulated (green or green with yellow stripe) equipment grounding conductor of the electrical system. [517.61(C)(3)](https://2023.antflix.net#517.61(C)(3)) | https://2023.antflix.net#517.61(C)(3) |
Chaptewr 5 Special Occupancies | 517.62 | In any anesthetizing area, all metal raceways and metal-sheathed cables and all normally non—current-carrying conductive portions of fixed electrical equipment shall be connected to an equipment grounding conductor. Grounding and bonding in Class I locations shall comply with 501.30. Exception: Equipment operating at not more than 10 volts between conductors shall not be required to be connected to an equipment grounding conductor. [517.62](https://2023.antflix.net#517.62) | https://2023.antflix.net#517.62 |
Chaptewr 5 Special Occupancies | 517.63(A) | One or more battery-powered lighting units shall be provided and shall be permitted to be wired to the critical lighting circuit in the area and connected ahead of any local switches. [517.63(A)](https://2023.antflix.net#517.63(A)) | https://2023.antflix.net#517.63(A) |
Chaptewr 5 Special Occupancies | 517.63(B) | Branch circuits supplying only listed, fixed, therapeutic and diagnostic equipment, permanently installed above the hazardous (classified) location and in unclassified locations, shall be permitted to be supplied from a normal grounded service, single- or three-phase system, provided the following apply: Wiring for grounded and isolated circuits does not occupy the same raceway or cable.All conductive surfaces of the equipment are connected to an equipment grounding conductor.Equipment (except enclosed X-ray tubes and the leads to the tubes) is located at least 2.5 m (8 ft) above the floor or outside the anesthetizing location.Switches for the grounded branch circuit are located outside the hazardous (classified) location.Exception: Sections 517.63(B)(3) and (B)(4) shall not apply in unclassified locations. [517.63(B)](https://2023.antflix.net#517.63(B)) | https://2023.antflix.net#517.63(B) |
Chaptewr 5 Special Occupancies | 517.63(C) | Branch circuits supplying only fixed lighting shall be permitted to be supplied by a normal grounded service, provided the following apply: Such luminaires are located at least 2.5 m (8 ft) above the floor.All conductive surfaces of luminaires are connected to an equipment grounding conductor.Wiring for circuits supplying power to luminaires does not occupy the same raceway or cable for circuits supplying isolated power.Switches are wall-mounted and located above hazardous (classified) locations.Exception: Sections 517.63(C)(1) and (C)(4) shall not apply in unclassified locations. [517.63(C)](https://2023.antflix.net#517.63(C)) | https://2023.antflix.net#517.63(C) |
Chaptewr 5 Special Occupancies | 517.63(D) | Wall-mounted remote-control stations for remote-control switches operating at 24 volts or less shall be permitted to be installed in any anesthetizing location. [517.63(D)](https://2023.antflix.net#517.63(D)) | https://2023.antflix.net#517.63(D) |
Chaptewr 5 Special Occupancies | 517.63(E) | Where an isolated power system is utilized, the isolated power equipment shall be listed as isolated power equipment. Isolated power system equipment and its supply circuit shall be permitted to be located in an anesthetizing location, provided it is installed above a hazardous (classified) location or in an unclassified location. [517.63(E)](https://2023.antflix.net#517.63(E)) | https://2023.antflix.net#517.63(E) |
Chaptewr 5 Special Occupancies | 517.63(F) | Except as permitted above, each power circuit within, or partially within, a flammable anesthetizing location as referred to in 517.60 shall be isolated from any distribution system supplying other-than-anesthetizing locations. [517.63(F)](https://2023.antflix.net#517.63(F)) | https://2023.antflix.net#517.63(F) |
Chaptewr 5 Special Occupancies | 517.64(A) | Low-voltage equipment that is frequently in contact with the bodies of persons or has exposed current-carrying elements shall comply with one of the following: Operate on an electrical potential of 10 volts or lessBe approved as intrinsically safe or double-insulated equipmentBe moisture resistant [517.64(A)](https://2023.antflix.net#517.64(A)) | https://2023.antflix.net#517.64(A) |
Chaptewr 5 Special Occupancies | 517.64(B) | Power shall be supplied to low-voltage equipment from one of the following: An individual portable isolating transformer (autotransformers shall not be used) connected to an isolated power circuit receptacle by means of an appropriate cord and attachment plugA common low-voltage isolating transformer installed in an unclassified locationIndividual dry-cell batteriesCommon batteries made up of storage cells located in an unclassified location [517.64(B)](https://2023.antflix.net#517.64(B)) | https://2023.antflix.net#517.64(B) |
Chaptewr 5 Special Occupancies | 517.64(C) | Isolating-type transformers for supplying low-voltage circuits shall have both of the following: Approved means for insulating the secondary circuit from the primary circuitThe core and case connected to an equipment grounding conductor [517.64(C)](https://2023.antflix.net#517.64(C)) | https://2023.antflix.net#517.64(C) |
Chaptewr 5 Special Occupancies | 517.64(D) | Resistance or impedance devices shall be permitted to control low-voltage equipment but shall not be used to limit the maximum available voltage to the equipment. [517.64(D)](https://2023.antflix.net#517.64(D)) | https://2023.antflix.net#517.64(D) |
Chaptewr 5 Special Occupancies | 517.64(E) | Battery-powered appliances shall not be capable of being charged while in operation unless their charging circuitry incorporates an integral isolating-type transformer. [517.64(E)](https://2023.antflix.net#517.64(E)) | https://2023.antflix.net#517.64(E) |
Chaptewr 5 Special Occupancies | 517.64(F) | Any receptacle or attachment plug used on low-voltage circuits shall be of a type that does not permit interchangeable connection with circuits of higher voltage. Informational Note: Any interruption of the circuit, even circuits as low as 10 volts, either by any switch or loose or defective connections anywhere in the circuit, may produce a spark that is sufficient to ignite flammable anesthetic agents. [517.64(F)](https://2023.antflix.net#517.64(F)) | https://2023.antflix.net#517.64(F) |
Chaptewr 5 Special Occupancies | 517.70 | Nothing in this part shall be construed as specifying safeguards against possible radiation or magnetic fields. Informational Note No. 1: Radiation safety and performance requirements of several classes of X-ray equipment are regulated under Public Law 90-602 and are enforced by the Department of Health and Human Services. Informational Note No. 2: Information on radiation protection by the National Council on Radiation Protection and Measurements is published as Reports of the National Council on Radiation Protection and Measurement. These reports are obtainable from NCRP Publications, P.O. Box 30175, Washington, DC 20014. Informational Note No. 3: Examples of diagnostic imaging equipment can include, but are not limited to, the following:General radiographic (X-ray) equipment (mobile and fixed)General fluoroscopic equipment (mobile and fixed)Interventional equipment (mobile and fixed)Bone mineral density equipmentDental equipmentComputerized tomography (CT) equipmentPositron emission tomography (PET) equipmentNuclear medicine equipmentMammography equipmentMagnetic resonance (MR) equipmentDiagnostic ultrasound equipmentElectrocardiogram equipmentInformational Note No. 4: Examples of treatment equipment can include, but are not limited to, the following:Linear acceleratorsGamma knifeCyber knifeProton therapyTomotherapy [517.70](https://2023.antflix.net#517.70) | https://2023.antflix.net#517.70 |
Chaptewr 5 Special Occupancies | 517.71(A) | Fixed and stationary diagnostic imaging and treatment equipment shall be connected to the power supply by means of a wiring method complying with applicable requirements of Chapters 1 through 4 of this Code, as modified by this article. Exception: Equipment properly supplied by a branch circuit rated at not over 30 amperes shall be permitted to be supplied through a suitable attachment plug and hard-service cable or cord. [517.71(A)](https://2023.antflix.net#517.71(A)) | https://2023.antflix.net#517.71(A) |
Chaptewr 5 Special Occupancies | 517.71(B) | Individual branch circuits shall not be required for portable, mobile, and transportable medical diagnostic imaging and treatment equipment requiring a capacity of not over 60 amperes. [517.71(B)](https://2023.antflix.net#517.71(B)) | https://2023.antflix.net#517.71(B) |
Chaptewr 5 Special Occupancies | 517.71(C) | Circuits and equipment operated on a supply circuit of over 1000 volts shall comply with Parts I through IV of Article 495. [517.71(C)](https://2023.antflix.net#517.71(C)) | https://2023.antflix.net#517.71(C) |
Chaptewr 5 Special Occupancies | 517.72(A) | A disconnecting means rated for at least 50 percent of the input required for the momentary rating or 100 percent of the input required for the long-time rating of the diagnostic imaging and treatment equipment, whichever is greater, shall be provided in the supply circuit. [517.72(A)](https://2023.antflix.net#517.72(A)) | https://2023.antflix.net#517.72(A) |
Chaptewr 5 Special Occupancies | 517.72(B) | The disconnecting means shall be operable from a location readily accessible from the control location. [517.72(B)](https://2023.antflix.net#517.72(B)) | https://2023.antflix.net#517.72(B) |
Chaptewr 5 Special Occupancies | 517.72(C) | For equipment connected to a 120-volt branch circuit of 30 amperes or less, a grounding-type attachment plug and receptacle of proper rating shall be permitted to serve as a disconnecting means. [517.72(C)](https://2023.antflix.net#517.72(C)) | https://2023.antflix.net#517.72(C) |
Chaptewr 5 Special Occupancies | 517.73(A) | The ampacity of supply branch-circuit conductors and the current rating of overcurrent protective devices shall not be less than 50 percent of the momentary rating or 100 percent of the long-time rating, whichever is greater. [517.73(A)](https://2023.antflix.net#517.73(A)) | https://2023.antflix.net#517.73(A) |
Chaptewr 5 Special Occupancies | 517.73(B) | The ampacity of supply feeders and the current rating of overcurrent protective devices supplying two or more branch circuits supplying diagnostic imaging and treatment equipment shall not be less than 50 percent of the momentary demand rating of the largest unit, plus 25 percent of the momentary demand rating of the next largest unit, plus 10 percent of the momentary demand rating of each additional unit. Informational Note No. 1: The minimum conductor size for branch and feeder circuits is also governed by voltage regulation requirements. For a specific installation, the manufacturer usually specifies minimum distribution transformer and conductor sizes, rating of disconnecting means, and overcurrent protection. Informational Note No. 2: The ampacity of the branch-circuit conductors and the ratings of disconnecting means and overcurrent protection for diagnostic imaging and treatment equipment are usually designated by the manufacturer for the specific installation. [517.73(B)](https://2023.antflix.net#517.73(B)) | https://2023.antflix.net#517.73(B) |
Chaptewr 5 Special Occupancies | 517.74(A) | The number of control circuit conductors installed in a raceway shall be determined in accordance with 300.17. [517.74(A)](https://2023.antflix.net#517.74(A)) | https://2023.antflix.net#517.74(A) |
Chaptewr 5 Special Occupancies | 517.74(B) | Size 18 AWG or 16 AWG fixture wires in accordance with 724.49 and flexible cords shall be permitted for the control and operating circuits of diagnostic imaging and treatment equipment and auxiliary equipment where protected by not larger than 20-ampere overcurrent devices. [517.74(B)](https://2023.antflix.net#517.74(B)) | https://2023.antflix.net#517.74(B) |
Chaptewr 5 Special Occupancies | 517.76 | Transformers and capacitors that are part of diagnostic imaging and treatment equipment shall not be required to comply with Parts I and II of Articles 450 and 460. Capacitors shall be mounted within enclosures of insulating material or grounded metal. [517.76](https://2023.antflix.net#517.76) | https://2023.antflix.net#517.76 |
Chaptewr 5 Special Occupancies | 517.77 | Cables with grounded shields shall be permitted to be installed in cable trays or cable troughs along with control and power supply conductors without the need for barriers to separate the wiring. [517.77](https://2023.antflix.net#517.77) | https://2023.antflix.net#517.77 |
Chaptewr 5 Special Occupancies | 517.78(A) | All high-voltage parts shall be mounted within grounded enclosures. The connection from the high-voltage equipment to other high-voltage components shall be made with high-voltage shielded cables. [517.78(A)](https://2023.antflix.net#517.78(A)) | https://2023.antflix.net#517.78(A) |
Chaptewr 5 Special Occupancies | 517.78(B) | Low-voltage cables connecting to oil-filled units that are not completely sealed, such as transformers, condensers, oil coolers, and high-voltage switches, shall have insulation of the oil-resistant type. [517.78(B)](https://2023.antflix.net#517.78(B)) | https://2023.antflix.net#517.78(B) |
Chaptewr 5 Special Occupancies | 517.78(C) | Non-current-carrying metal parts of diagnostic imaging and treatment equipment (e.g., controls, tables, transformer tanks, shielded cables) shall be connected to an equipment grounding conductor in accordance with Part VII of Article 250, as modified by 517.13(A) and (B). [517.78(C)](https://2023.antflix.net#517.78(C)) | https://2023.antflix.net#517.78(C) |
Chaptewr 5 Special Occupancies | 517.80 | Equivalent insulation and isolation to that required for the electrical distribution systems in patient care areas shall be provided for communications, signaling systems, data system circuits, fire alarm systems, and systems less than 120 volts, nominal. Class 2 and Class 3 signaling and communications systems, Class 2 circuits that transmit power and data to a powered device, and power-limited fire alarm systems shall not be required to comply with the grounding requirements of 517.13, to comply with the mechanical protection requirements of 517.31(C)(3)(5), or to be enclosed in raceways, unless otherwise specified by Chapters 7 or 8. Secondary circuits of transformer-powered communications or signaling systems shall not be required to be enclosed in raceways unless otherwise specified by Chapters 7 or 8. [99:6.7.2.2.7] Informational Note: See ANSI/NEMA C137.3-2017, American National Standard for Lighting Systems - Minimum Requirements for Installation of Energy Efficient Power over Ethernet (PoE) Lighting Systems, for information on installation of cables for PoE lighting systems. [517.80](https://2023.antflix.net#517.80) | https://2023.antflix.net#517.80 |
Chaptewr 5 Special Occupancies | 517.81 | In other-than-patient-care spaces, installations shall be in accordance with other parts of this Code. [517.81](https://2023.antflix.net#517.81) | https://2023.antflix.net#517.81 |
Chaptewr 5 Special Occupancies | 517.82(A) | Permanently installed signal cabling from an appliance in a patient location to remote appliances shall employ a signal transmission system that prevents hazardous grounding interconnection of the appliances. Informational Note: See 517.13(A) for additional grounding requirements in patient care spaces. [517.82(A)](https://2023.antflix.net#517.82(A)) | https://2023.antflix.net#517.82(A) |
Chaptewr 5 Special Occupancies | 517.82(B) | Common signal grounding wires (i.e., the chassis ground for single-ended transmission) shall be permitted to be used between appliances all located within the patient care vicinity, provided the appliances are served from the same reference grounding point. [517.82(B)](https://2023.antflix.net#517.82(B)) | https://2023.antflix.net#517.82(B) |
Chaptewr 5 Special Occupancies | 517.160(A)(1) | Each isolated power circuit shall be controlled by a switch or circuit breaker that has a disconnecting pole in each isolated circuit conductor to simultaneously disconnect all power. Such isolation shall be accomplished by means of one or more isolation transformers, by means of generator sets, or by means of electrically isolated batteries. Conductors of isolated power circuits shall not be installed in cables, raceways, or other enclosures containing conductors of another system. [517.160(A)(1)](https://2023.antflix.net#517.160(A)(1)) | https://2023.antflix.net#517.160(A)(1) |
Chaptewr 5 Special Occupancies | 517.160(A)(2) | Circuits supplying primaries of isolating transformers shall operate at not more than 600 volts between conductors and shall be provided with proper overcurrent protection. The secondary voltage of such transformers shall not exceed 600 volts between conductors of each circuit. All circuits supplied from such secondaries shall be ungrounded and shall have an approved overcurrent device of proper ratings in each conductor. Circuits supplied directly from batteries or from motor generator sets shall be ungrounded and shall be protected against overcurrent in the same manner as transformer-fed secondary circuits. If an electrostatic shield is present, it shall be connected to the reference grounding point. [517.160(A)(2)](https://2023.antflix.net#517.160(A)(2)) | https://2023.antflix.net#517.160(A)(2) |
Chaptewr 5 Special Occupancies | 517.160(A)(3) | The isolating transformers, motor generator sets, batteries and battery chargers, and associated primary or secondary overcurrent devices shall not be installed in hazardous (classified) locations. The isolated secondary circuit wiring extending into a hazardous anesthetizing location shall be installed in accordance with 501.10. [517.160(A)(3)](https://2023.antflix.net#517.160(A)(3)) | https://2023.antflix.net#517.160(A)(3) |
Chaptewr 5 Special Occupancies | 517.160(A)(4) | An isolation transformer shall not serve more than one operating room except as covered in 517.160(A)(4)(a) and (A)(4)(b). For purposes of this section, anesthetic induction rooms are considered part of the operating room or rooms served by the induction rooms.Induction Rooms. Where an induction room serves more than one operating room, the isolated circuits of the induction room shall be permitted to be supplied from the isolation transformer of any one of the operating rooms served by that induction room.Higher Voltages. Isolation transformers shall be permitted to serve single receptacles in several patient areas where the following apply:The receptacles are reserved for supplying power to equipment requiring 150 volts or higher, such as portable X-ray units.The receptacles and mating plugs are not interchangeable with the receptacles on the local isolated power system. [517.160(A)(4)](https://2023.antflix.net#517.160(A)(4)) | https://2023.antflix.net#517.160(A)(4) |
Chaptewr 5 Special Occupancies | 517.160(A)(5) | The isolated circuit conductors shall be identified as follows: Isolated Conductor No. 1 - Orange with at least one distinctive colored stripe other than white, green, or gray along the entire length of the conductorIsolated Conductor No. 2 - Brown with at least one distinctive colored stripe other than white, green, or gray along the entire length of the conductorFor 3-phase systems, the third conductor shall be identified as yellow with at least one distinctive colored stripe other than white, green, or gray along the entire length of the conductor. Where isolated circuit conductors supply 125-volt, single-phase, 15- and 20-ampere receptacles, the striped orange conductor(s) shall be connected to the terminal(s) on the receptacles that are identified in accordance with 200.10(B) for connection to the grounded circuit conductor. [517.160(A)(5)](https://2023.antflix.net#517.160(A)(5)) | https://2023.antflix.net#517.160(A)(5) |
Chaptewr 5 Special Occupancies | 517.160(A)(6) | Wire-pulling compounds that increase the dielectric constant shall not be used on the secondary conductors of the isolated power supply. Informational Note No. 1: It is desirable to limit the size of the isolation transformer to 10 kVA or less and to use conductor insulation with low leakage to meet impedance requirements. Informational Note No. 2: Minimizing the length of branch-circuit conductors and using conductor insulations with a dielectric constant less than 3.5 and insulation resistance constant greater than 6100 megohm-meters (20,000 megohm-feet) at 16°C (60°F) reduces leakage from line to ground, reducing the hazard current. [517.160(A)(6)](https://2023.antflix.net#517.160(A)(6)) | https://2023.antflix.net#517.160(A)(6) |
Chaptewr 5 Special Occupancies | 517.160(B)(1) | In addition to the usual control and over-current protective devices, each isolated power system shall be provided with a listed continually operating line isolation monitor that indicates total hazard current. The monitor shall be designed such that a green signal lamp, conspicuously visible to persons in each area served by the isolated power system, remains lighted when the system is adequately isolated from ground. An adjacent red signal lamp and an audible warning signal (remote if desired) shall be energized when the total hazard current (consisting of possible resistive and capacitive leakage currents) from either isolated conductor to ground reaches a threshold value of 5 mA under nominal line voltage conditions. The line monitor shall not alarm for a fault hazard of less than 3.7 mA or for a total hazard current of less than 5 mA. Exception: A system shall be permitted to be designed to operate at a lower threshold value of total hazard current. A line isolation monitor for such a system shall be permitted to be approved, with the provision that the fault hazard current shall be permitted to be reduced but not to less than 35 percent of the corresponding threshold value of the total hazard current, and the monitor hazard current is to be correspondingly reduced to not more than 50 percent of the alarm threshold value of the total hazard current. [517.160(B)(1)](https://2023.antflix.net#517.160(B)(1)) | https://2023.antflix.net#517.160(B)(1) |
Chaptewr 5 Special Occupancies | 517.160(B)(2) | The line isolation monitor shall be designed to have sufficient internal impedance such that, when properly connected to the isolated system, the maximum internal current that can flow through the line isolation monitor, when any point of the isolated system is grounded, shall be 1 mA. Exception: The line isolation monitor shall be permitted to be of the low-impedance type such that the current through the line isolation monitor, when any point of the isolated system is grounded, will not exceed twice the alarm threshold value for a period not exceeding 5 milliseconds. Informational Note: Reduction of the monitor hazard current, provided this reduction results in an increased "not alarm" threshold value for the fault hazard current, will increase circuit capacity. [517.160(B)(2)](https://2023.antflix.net#517.160(B)(2)) | https://2023.antflix.net#517.160(B)(2) |
Chaptewr 5 Special Occupancies | 517.160(B)(3) | An ammeter calibrated in the total hazard current of the system (contribution of the fault hazard current plus monitor hazard current) shall be mounted in a plainly visible place on the line isolation monitor with the "alarm on" zone at approximately the center of the scale. Exception: The line isolation monitor shall be permitted to be a composite unit, with a sensing section cabled to a separate display panel section on which the alarm or test functions are located. Informational Note: It is desirable to locate the ammeter so that it is conspicuously visible to persons in the anesthetizing location. [517.160(B)(3)](https://2023.antflix.net#517.160(B)(3)) | https://2023.antflix.net#517.160(B)(3) |
Chaptewr 5 Special Occupancies | 518.1 | Except for the assembly occupancies explicitly covered by 520.1, this article covers all buildings or portions of buildings or structures designed or intended for the gathering together of 100 or more persons for such purposes as deliberation, worship, entertainment, eating, drinking, amusement, awaiting transportation, or similar purposes. Informational Note: See NFPA 101-2021, Life Safety Code, or the local building code for methods of determining population capacity. [518.1](https://2023.antflix.net#518.1) | https://2023.antflix.net#518.1 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.