(ii) Lighting fixtures and lighting outlets installed in the area extending between 1.52 m (5 ft) and 3.05 m (10 ft) horizontally from the inside walls of a pool shall be protected by a ground-fault circuit interrupter unless installed 1.52 m (5 ft) above the maximum water level and rigidly attached to the structure adjacent to or enclosing the pool. The type of enclosure used in a given case shall be designed and constructed according to the hazards associated with the installation. (viii) Flexible cords and cables run on the ground, where accessible to the public, shall be covered with approved nonconductive mats. Employers may use the zone classification system as an alternative to the division classification system for electric and electronic equipment and wiring for all voltage in Class I, Zone 0, Zone 1, and Zone 2 hazardous (classified) locations where fire or explosion hazards may exist due to flammable gases, vapors, or liquids. This paragraph applies to central-station-connected and non-central-station-connected telephone circuits, radio and television receiving and transmitting equipment, including community antenna television and radio distribution systems, telegraph, district messenger, and outside wiring for fire and burglar alarm, and similar central station systems. (4) Operation. (i) A Class 1 power-limited circuit shall be supplied from a source having a rated output of not more than 30 volts and 1000 volt-amperes. This paragraph applies to portable cables used at more than 600 volts, nominal. Where motor overload protection external to the appliance is required, the appliance shall be so marked. or greater. In all cases, the working space shall permit at least a 90-degree opening of equipment doors or hinged panels; and. Integrated electrical systems covered by 1910.308(g) need not have the disconnecting means required by paragraph (e)(1) of this section. There shall also be a similar means to disconnect the power to all dedicated heating, ventilating, and air-conditioning (HVAC) systems serving the room and to cause all required fire/smoke dampers to close. These systems may have ac or dc output for utilization. The metal parts of the following nonelectrical equipment shall be grounded: frames and tracks of electrically operated cranes and hoists; frames of nonelectrically driven elevator cars to which electric conductors are attached; hand-operated metal shifting ropes or cables of electric elevators; and metal partitions, grill work, and similar metal enclosures around equipment of over 750 volts between conductors. (ii) Working space required by this standard may not be used for storage. Electric equipment may not be used unless the following markings have been placed on the equipment: (i) The manufacturer's name, trademark, or other descriptive marking by which the organization responsible for the product may be identified; and. (i) Where circuit breakers or fuses are applied in compliance with the series combination ratings marked on the equipment by the manufacturer, the equipment enclosures shall be legibly marked in the field to indicate that the equipment has been applied with a series combination rating. On three-phase, three-wire circuits, an overcurrent relay in the residual circuit of the current transformers may replace one of the phase relays. (ii) Where fuses are used to protect conductors and equipment, a fuse shall be placed in each ungrounded conductor. (i) A conductor used as a grounded conductor shall be identifiable and distinguishable from all other conductors. Why are there six date columns instead of four? shall be guarded. However, switches or other equipment operating at 600 volts, nominal, or less, and serving only equipment within the high-voltage vault, room, or enclosure may be installed in the high-voltage enclosure, room, or vault if accessible to qualified persons only. Table S-2 - Minimum Depth of Clear Working Space at Electric Equipment, Over 600 V. (vi) The minimum headroom of working spaces about service equipment, switchboards, panelboards, or motor control centers shall be * * * 1.98 m (6.5 ft), except that where the electrical equipment exceeds 1.98 m (6.5 ft) in height, the minimum headroom may not be less than the height of the equipment. (2) Control. The following requirements apply to overcurrent protection of circuits rated 600 volts, nominal, or less. A fence may not be less than 2.13 m (7.0 ft) in height or a combination of 1.80 m (6.0 ft) or more of fence fabric and a 305-mm (1-ft) or more extension utilizing three or more strands of barbed wire or equivalent. (vii) A receptacle installed in a wet location where the product intended to be plugged into it will be attended while in use (for example, portable tools) shall have an enclosure that is weatherproof when the attachment plug cap is removed. (ii) Signs and outline lighting systems located within fountains shall have the disconnect located at least 1.52 m (5.0 ft) from the inside walls of the fountain. (viii) Other factors that contribute to the practical safeguarding of persons using or likely to come in contact with the equipment. This standard [72 FR 7136] is intended to reduce the risk of injury and death caused by unsafe electrical installations. However, paragraphs (h)(2)[and](h)(3) of this section do not apply to the equipment on the supply side of the service point. (iii) The following requirements apply to indoor installations that are accessible to other than qualified persons: (A) The installations shall be made with metal-enclosed equipment or shall be enclosed in a vault or in an area to which access is controlled by a lock; (B) Metal-enclosed switchgear, unit substations, transformers, pull boxes, connection boxes, and other similar associated equipment shall be marked with appropriate caution signs; and. Electric equipment and wiring methods in or on rides, concessions, or other units shall be provided with mechanical protection where such equipment or wiring methods are subject to physical damage. (2) Identification, splices, and terminations. In this work, fire hazards associated with lead acid batteries are identified both from a review of incidents involving them and from available fire test information. (1) Space about electric equipment. Chapters 9, 12 and 16 of NFPA 30, also the law in most states, apply to storage of combustible and flammable liquids. Terms of Use (1) Wiring methods. (iv) Warning labels or signs that read "DANGER - HIGH VOLTAGE - KEEP OUT" shall be attached to the equipment and shall be plainly visible where persons might contact energized parts when doors are opened or closed or when panels are removed from compartments containing over 250 volts ac or dc. (ii) Wire connectors or splicing means installed on conductors for direct burial shall be listed for such use. (iv) Unless specifically permitted otherwise in paragraph (g)(1)(ii) of this section, flexible cords and cables may not be used: (A) As a substitute for the fixed wiring of a structure; (B) Where run through holes in walls, ceilings, or floors; (C) Where run through doorways, windows, or similar openings; (E) Where concealed behind building walls, ceilings, or floors; or. For more information on the features of NFPA LiNK, including access to a 14-day risk-free trial for all new users, please visitwww.nfpa.org/LiNK. (iii) Doors or covers giving access to uninsulated parts of indoor signs or outline lighting exceeding 600 volts and accessible to other than qualified persons shall either be provided with interlock switches to disconnect the primary circuit or shall be so fastened that the use of other than ordinary tools will be necessary to open them. (2) Grouping. This paragraph applies to the installation of the electrical components and accessory equipment of electrolytic cells, electrolytic cell lines, and process power supply for the production of aluminum, cadmium, chlorine, copper, fluorine, hydrogen peroxide, magnesium, sodium, sodium chlorate, and zinc. National Fire Protection Association (NFPA) 2022, National Fire Protection Association (NFPA) 2022, National Fire Codes Subscription Service, The value of Standards Development Organizations, Alternative Fuel Vehicles Safety Training, Reducing Wildfire Risk to People and Property, State-approved NEC and NFPA 70E electrical online training, Certification for Electrical Safety in the Workplace, Safety in living and entertainment spaces, Review of Impact of Medications on Older Adult Fall and Fire Risk, Homes fires with ten or more fatalities table, Deadliest fires and explosions by property class table, Deadliest single building or complex fires and explosions in the U.S. table, Deadliest fires and explosions in U.S. history table, Deadliest fires or explosions in the world table, Deadliest fires in retail properties since 1970, Environmental Impact of Fires in the Built Environment, Home Fires That Began with Upholstered Furniture, Home fires involving clothes dryers and washing machines, Physical disability as a factor in home fire deaths, A Review of Dynamic Directional Exit Signage: Challenges and Perspectives, Digitized Fuel Load Survey Methodology Using Machine Vision, High Rise Buildings with Combustible Exterior Wall Assemblies: Fire Risk Assessment Tool, Modern Vehicle Hazards in Parking Garages & Vehicle Carriers, Railing Height, Design and Criteria Review, Fire in Industrial or Manufacturing Properties, Structure Fires in Eating and Drinking Establishments, US school fires, grades K-12, with 10 or more deaths, Structure Fires in Dormitories, Fraternities, Sororities and Barracks, Structure Fires in Residential Board and Care Facilities, Structure Fires in Stores and Other Mercantile Properties, U.S. Where is NFPA 30 the law? The following requirements apply to industrial and commercial laboratory equipment. This paragraph applies to electric equipment operating at 600 volts, nominal, or less to ground. The conductors and equipment required or permitted by this subpart shall be acceptable only if approved, as defined in 1910.399. WebNFPA 1700 Training Materials: Development of Training Materials to Support the Implementation of NFPA 1700, Guide for Structural Fire Fighting; Literature Review on Spaceport Fire Safety; An Analysis of Public Safety Call Answering and Event Processing Times; Development of real-time particulate and toxic gas sensors for firefighter health Such disconnecting means shall consist of a motor-circuit switch, circuit breaker, or molded case switch. It is also enforceable in several local jurisdictions. Lead is soft and malleable, and also has a relatively low melting point.When freshly cut, lead is a shiny gray with a hint of blue. (ii) A conductor used as an equipment grounding conductor shall be identifiable and distinguishable from all other conductors. Terms of Use See more information from NFPA on high-rise buildings. (1) Insulation. (2) Shielding. Where doors are used giving access to voltages of over 1000 volts ac or dc, either mechanical lockouts with a disconnecting means to prevent access until circuit parts within the cubicle are deenergized, or both door interlocking and mechanical door locks, shall be provided. (a) Use and identification of grounded and grounding conductors. Fixture wires shall be approved for the voltage, temperature, and location of use. (B) Receptacles other than 125 volt, single-phase, 15-, 20-, and 30-ampere receptacles that are not part of the permanent wiring of the building or structure and that are in use by personnel shall have ground-fault circuit-interrupter protection for personnel. (i) All 3-wire dc systems shall have their neutral conductor grounded; (2) Conductor to be grounded. (5) Disconnecting means. (i) All pull boxes, junction boxes, and fittings shall be provided with covers identified for the purpose. (5) Minimum bending radii. However, No. Updated and expanded! (5) Nonincendive circuit. Busbars shall be either copper or aluminum. The branch circuit wiring method shall include or provide an equipment grounding conductor to which the grounding contacts of the receptacle or cord connector shall be connected. Note 2 to paragraph (b)(3)(ii)(A) of this section: Cord sets and devices incorporating the required ground-fault circuit-interrupter that are connected to the receptacle closest to the source of power are acceptable forms of protection. (j) Equipment for general use. (E) If the system is a high-impedance grounded neutral system in which a grounding impedance, usually a resistor, limits the ground-fault current to a low value for 3-phase ac systems of 480 volts to 1000 volts provided all of the following conditions are met: (1) The conditions of maintenance and supervision ensure that only qualified persons will service the installation; (3) Ground detectors are installed on the system; and. This paragraph applies to induction and dielectric heating equipment and accessories for industrial and scientific applications, but not for medical or dental applications or for appliances. (ii) The disconnecting means shall be provided with a sign to identify the location of the supply-side overcurrent protective device. The following are acceptable protection techniques for electric and electronic equipment in hazardous (classified) locations. (7) Cranes and hoists. (vii) Switchboards, panelboards, and distribution boards installed for the control of light and power circuits, and motor control centers shall be located in dedicated spaces and protected from damage. (ii) Equipment shall be marked in accordance with paragraph (g)(5)(ii)(A) and (g)(5)(ii)(B) of this section, except as provided in (g)(5)(ii)(C). (v) Unguarded live parts above working space shall be maintained at elevations not less than specified in Table S3. (ii) Except for motor running overload protection, overcurrent devices may not interrupt the continuity of the grounded conductor unless all conductors of the circuit are opened simultaneously. (A) The lighting outlets shall be arranged so that persons changing lamps or making repairs on the lighting system will not be endangered by live parts or other equipment. (i) The frames and enclosures of portable electric equipment used within the cell line working zone may not be grounded, unless the cell line circuit voltage does not exceed 200 volts dc or the frames are guarded. (C) Where connected to a branch circuit supplying two or more receptacles or outlets, receptacle ratings shall conform to the values listed in Table S-5; or, where larger than 50 amperes, the receptacle rating may not be less than the branch-circuit rating. Conductors and equipment used on circuits exceeding 600 volts, nominal, shall comply with all applicable provisions of the paragraphs (a) through (g) of this section and with the following provisions, which supplement or modify the preceding requirements. If all reports in a subject category are requested, a 20% discount applies. (iii) Where cable is used, each cable shall be secured to the cabinet, cutout box, or meter socket enclosure. Where flexible cords are permitted to be permanently connected, receptacles may be omitted. Only 11 of the 49 civilian Motor controllers may be located outside the spaces otherwise required by paragraph (c) of this section, provided they are in enclosures with doors or removable panels capable of being locked closed and the disconnecting means is located adjacent to or is an integral part of the motor controller. (5) Listing and marking. Table S3 Elevation of Unguarded Live Parts Above Working Space. (3) Other sections of this subpart. Turn off heaters when you leave the room or go to sleep. (v) The neutral conductor of a multiphase system in which one phase is used as a neutral conductor shall be grounded. All external metal handles and controls accessible to the operating personnel shall be effectively grounded. (D) Multiconductor cable, Type MV; where exposed to direct rays of the sun, the cable shall be identified as being sunlight resistant. (4) Faceplates for flush-mounted snap switches. (i) Receptacles installed on 15- and 20-ampere branch circuits shall be of the grounding type except as permitted for replacement receptacles in paragraph (b)(2)(iv) of this section. Hydrogen is the lightest element. (i) All capacitors, except surge capacitors or capacitors included as a component part of other apparatus, shall be provided with an automatic means of draining the stored charge after the capacitor is disconnected from its source of supply. (i) Temporary electrical power and lighting installations of 600 volts, nominal, or less may be used only as follows: (A) During and for remodeling, maintenance, or repair of buildings, structures, or equipment, and similar activities; (B) For a period not to exceed 90 days for Christmas decorative lighting, carnivals, and similar purposes; or. 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