2, Exception Nos. 1 and 2.

Exception No. 7: Flexible metal conduit, liquidtight flexible metal conduit, or flexible cords and cables, or conductors grouped together and taped or corded that are part of listed equipment, a driving machine, or a driving machine brake shall be permitted on the counterweight assembly, in lengths not to exceed 6 feet (1.83 mm), without being installed in a raceway and where located to be free from physical damage. Where motor-generators, machine motors, or pumping unit motors and valves are located adjacent to or underneath control equipment and are provided with extra-length terminal leads not exceeding 6 feet (1.83 m) in length, such leads shall be permitted to be extended to connect directly to controller terminal studs without regard to the carrying-capacity requirements of Articles 430 and 445. Auxiliary gutters shall be permitted in machine and control rooms between controllers, starters, and similar apparatus. 620-22. Branch Circuits for Car Lighting, Accessories, Heating, and Air Conditioning. (a) Car Light Source. A dedicated branch circuit shall supply the car lights and accessories on each elevator car. (b) Air Conditioning and Heating Source. A dedicated branch circuit shall supply the air-conditioning and heating units on each elevator car. D. Installation of Conductors 620-31. Raceway Terminal Fittings. Conductors shall comply with Section 300-16(b). In locations where raceways project from the floor and terminate in other than a wiring enclosure, they shall extend at least 6 inches (152 mm) above the floor. 620-32. Wireways. Section 362-5 shall not apply to wireways. The sum of the cross-sectional area of the individual conductors in a wireway shall not be more than 50 percent of the interior cross-sectional area of the wireway. 70-658 NATIONAL ELECTRICAL CODE Vertical runs of wireways shall be securely supported at intervals not exceeding 15 feet (4.57 m) and shall have not more than one joint between supports. Adjoining wireway sections shall be securely fastened together to provide a rigid joint. 620-33. Number of Conductors in Raceways. The sum of the crosssectional area of the operating and control circuit conductors in raceways shall not exceed 40 percent of the interior cross-sectional area of the raceway. Exception: In wireways as permitted in Section 620-32. 620-34. Supports. Supports for cables or raceways in a hoistway or in an escalator or moving walk wellway or wheelchair lift and stairway chair lift runway shall be securely fastened to the guide rail, escalator or moving walk truss, or to the hoistway, wellway, or runway construction. 620-35. Auxiliary Gutters (Wiring Troughs). Auxiliary gutters shall not be subject to the restrictions of Section 374-2 as to length or of Section 374-5 as to number of conductors. 620-36. Different Systems in One Raceway or Traveling Cable. Conductors for operating, control, power, signaling, and lighting circuits of 600 volts or less shall be permitted to be run in the same traveling cable or raceway system if all conductors are insulated for the maximum voltage found in the cables or raceway system and if all live parts of the equipment are insulated from ground for this maximum voltage. Such a traveling cable or raceway shall also be permitted to include shielded conductors and/or one or more coaxial cables, if such conductors are insulated for the maximum voltage found in the cable or raceway system. Conductors shall be permitted to be covered with suitable shielding for telephone, audio, video, or higher frequency communication circuits. 620-37. Wiring in Hoistways and Machine Rooms. Only such electric wiring, raceways, and cables used directly in connection with the elevator or dumbwaiter, including wiring for signals, for communication with the car, for lighting, heating, air conditioning, and ventilating the car, for fire detecting systems, for pit sump pumps, and for heating and lighting the hoistway, shall be permitted inside the hoistway and the machine room. Main feeders for supplying power to elevators and dumbwaiters shall be installed outside the hoistway. Exception No. 1: By special permission, feeders for elevators shall be permitted within an existing hoistway if no conductors are spliced within the hoistway. Exception No. 2: Feeders shall be permitted inside the hoistway for elevators with driving machine motors located in the hoistway or on the car or counterweight. 620-38. Electric Equipment in Garages and Similar Occupancies. Electric equipment and wiring used for elevators, dumbwaiters, escalators, moving walks, and wheelchair lifts and stairway chair lifts in garages shall comply with the requirements of Article 511. Wiring and equipment ARTICLE 620 - ELEVATORS, DUMBWAITERS 70-659 located on the underside of the car platform shall be considered as being located in the hazardous area. (FPN): Garages used for parking or storage and where no repair work is done in accordance with Section 511-2 are not classified. 620-39. Sidewalk Elevators. Sidewalk elevators with sidewalk doors located exterior to the building shall have all electric wiring in rigid metal conduit, rigid nonmetallic conduit, intermediate metal conduit, liquidtight flexible metal conduit, liquidtight flexible nonmetallic conduit, or electrical metallic tubing, and all electrical outlets, switches, junction boxes, and fittings shall be weatherproof. E. Traveling Cables 620-41. Suspension of Traveling Cables. Traveling cables shall be so suspended at the car and hoistways' ends, or counterweight end where applicable, as to reduce the strain on the individual copper conductors to a minimum. Traveling cables shall be supported by one of the following means: (1) by its steel supporting member(s); (2) by looping the cables around supports for unsupported lengths less than 100 feet (30.5 m); (3) by suspending from the supports by a means that automatically tightens around the cable when tension is increased for unsupported lengths up to 200 feet (61 m). (FPN): Unsupported length for the hoistway suspension means is that length of cable as measured from the point of suspension in the hoistway to the bottom of the loop, with the elevator car located at the bottom landing. Unsupported length for the car suspension means is that length of cable as measured from the point of suspenlanding. sion on the car to the bottom of the loop, with the elevator car located at the top 620-42. Hazardous (Classified) Locations. In hazardous (classified) locations, traveling cables shall be of a type approved for hazardous (classified) locations and shall comply with Section 501-11, 502-12, or 503-10, as applicable. 620-43. Location of and Protection for Cables. Traveling cable supports shall be so located as to reduce to a minimum the possibility of damage due to the cables coming in contact with the hoistway construction or equipment in the hoistway. Where necessary, suitable guards shall be provided to protect the cables against damage. 620-44. Installation of Traveling Cables. Traveling cable shall be permitted to be run without the use of a raceway for a distance not exceeding 6 feet (1.83 m) in length as measured from the first point of support on the elevator car or hoistway wall, or counterweight where applicable, provided the conductors are grouped together and taped or corded, or in the original sheath. Traveling cables shall be permitted to be continued to elevator control panels and to elevator car and machine room connections, as fixed wiring, provided they are suitably supported and protected from physical damage. 70-660 NATIONAL ELECTRICAL CODE F. Disconnecting Means and Control 620-51. Disconnecting Means. Elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts shall have a single means for disconnecting all ungrounded main power supply conductors for each unit. Where multiple driving machines are connected to a single elevator, escalator, moving walk, or pumping unit, there shall be one disconnecting means to disconnect the motor(s) and control valve operating magnets. Where there is more than one driving machine in a machine room, disconnecting means shall be numbered to correspond to the number of the driving machine that they control. (a) Type. The disconnecting means shall be an enclosed externally operable fused motor circuit switch or circuit breaker arranged to be locked in the open position. No provision shall be made to open or close this disconnecting means from outside of the hoistway, machine room, or machinery spaces. The fuses or circuit breakers provided for in the disconnecting means shall be selectively coordinated with any and all other supply side overcurrent-protective devices. (FPN): For additional information, see Safety Code for Elevators and Escalators, ASME/ANSI A17.1-1990. (b) Location. The disconnecting means shall be located where it is readily accessible to qualified persons. (1) On elevators without generator field control, the disconnecting means shall be located within sight of the power converter or motor starter. Where the disconnecting means is not within sight of the hoist machine or control panel, an additional manually operated switch shall be installed adjacent to the remote equipment, connected in the control circuit to prevent starting. (2) On elevators with generator field control, the disconnecting means shall be located within sight of the motor starter for the driver motor of the motor-generator set. Where the disconnecting means is not within sight of the hoist machine, the control panel, or the motor-generator set, an additional manually operated switch shall be installed adjacent to the remote equipment, connected in the control circuit to prevent starting. (3) On escalators and moving walks, the disconnecting means shall be installed in the space where the controller is located. (4) On wheelchair lifts and stairway chair lifts, the disconnecting means shall be located within sight of the motor controller. The disconnecting means shall be permitted in the same enclosure with the motor controller. 620-52. Power from More than One Source. (a) Single- and Multi-Car Installations. On single- and multi-car installations, equipment receiving electrical power from more than one source shall be provided with a disconnecting means for each source of electrical power. The disconnecting means shall be within sight of the equipment served. ARTICLE 620 - ELEVATORS, DUMBWAITERS 70-661 (b) Warning Sign for Multiple Disconnecting Means. Where multiple disconnecting means are used and parts of the control panel remain energized from a source other than the one disconnected, a warning sign shall be mounted on or adjacent to the disconnecting means. The sign shall be clearly legible and shall read "Warning - Parts of the Control Panel Are Not Deenergized by This Switch." (c) Interconnection Multi-Car Control Panels. Where interconnections between control panels are necessary for the operation of the system on multi-car installations that remain energized from a source other than the one disconnected, a warning sign in accordance with Section 620-52(b) shall be mounted on or adjacent to the disconnecting means. 620-53. Car Light and Accessories Disconnecting Means. Elevators shall have a single means for disconnecting all ungrounded car light and accessories power-supply conductors for each unit. Where there is equipment for more than one car in the machine room, disconnecting means shall be numbered to correspond to the number of the elevator car whose light source they control. The disconnecting means shall be arranged to be locked in the open position and shall be located in the machine room for that car. 620-54. Heating and Air-Conditioning Disconnecting Means. Elevators shall have a single means for disconnecting all ungrounded car heating and air-conditioning power-supply conductors for each unit. Where there is equipment for more than one car in the machine room, disconnecting means shall be numbered to correspond to the number of the elevator car whose heating and air-conditioning source they control. The disconnecting means shall be arranged to be locked in the open position and shall be located in the machine room for that car. G. Overcurrent Protection 620-61. Overcurrent Protection. Overcurrent protection shall be provided as follows: (a) Control and Operating Circuits. Control and operating circuits and signaling circuits shall be protected against overcurrent in accordance with the requirements of Section 725-12. (b) Overload Protection for Motors. (1) Duty on elevator and dumbwaiter driving machine motors and driving motors of motor-generators used with generator field control shall be classed as intermittent. Such motors shall be protected against overload in accordance with Section 430-33. (2) Duty on escalator and moving walk driving machine motors shall be classed as continuous. Such motors shall be protected against overload in accordance with Section 430-32. (3) Escalator and moving walk driving machine motors and driving motors of motor-generator sets shall be protected against running overload as provided in Table 430-37. 70-662 NATIONAL ELECTRICAL CODE (4) Duty on wheelchair lift and stairway chair lift driving machine motors shall be classed as intermittent. Such motors shall be protected against overload in accordance with Section 430-33. H. Machine Room 620-71. Guarding Equipment. Elevator, dumbwaiter, escalator, and moving walk driving machines, motor-generator sets, motor controllers, and disconnecting means shall be installed in a room or enclosure set aside for that purpose. The room or enclosure shall be secured against unauthorized access. Exception No. 1: Dumbwaiter, escalator, moving walk, or wheelchair lift and stairway chair lift motor controllers shall be permitted outside the spaces herein specified, provided they are enclosed in cabinets with doors or removable panels capable of being locked in the closed position and the disconnecting means is located adjacent to or is an integral part of the motor controller. Motor controller cabinets for escalator or moving walks shall be permitted in the balustrading on the side located away from the moving steps or moving treadway. If the disconnecting means is an integral part of the controller, it must be operable without opening the cabinet. Exception No. 2: Elevator motor controllers and driving machines shall be permitted outside the spaces herein specified, provided the motor controllers are enclosed in cabinets with doors or removable panels capable of being locked in the closed position and the disconnecting means is located adjacent to or is an integral part of the controller. If the disconnecting means is an integral part of the controller, it must be operable without opening the cabinet. 620-72. Clearance Around Control Panels and Disconnecting Means. Sufficient clear working space shall be provided around control panels and disconnecting means to provide safe and convenient access to all live parts of the equipment necessary for maintenance and adjustment. The minimum clear working space about live parts on control panels and disconnecting means shall not be less than specified in Section 110-16. Exception No. 1: Where an escalator or moving walk control panel and disconnecting means are mounted in the same space as the escalator or moving walk drive machine and the clearances specified cannot be provided, the clearance requirements of Section 110-16 shall be permitted to be waived where the entire panel and disconnecting means are arranged so that they can be readily removed from the machine space and are provided with flexible leads to all external connections. Exception No. 2: Where an elevator motor control panel and disconnecting means are mounted in the hoistway or on the car, and the clearances specified cannot be provided, the clearance requirements of -83. Nonelectric Elevators. For elevators other than electric having any electric conductors attached to the car, the metal frame of the car, where normally accessible to persons, shall be grounded in accordance with Article 250. 620-84. Escalators, Moving Walks, Wheelchair Lifts, and Stairway Lifts. Escalators, moving walks, wheelchair lifts, and stairway chair lifts shall comply with Article 250. 620-85. Ground-Fault Circuit-Interrupter Protection for Personnel. All 125-volt, single-phase, 15- and 20-ampere receptacles installed in machine rooms, machinery spaces, pits, and elevator car tops shall have groundfault circuit-interrupter protection. K. Overspeed 620-91. Overspeed Protection for Elevators. Under overhauling load conditions, a means shall be provided on the load side of each elevator power disconnecting means to prevent the elevator from attaining a speed equal to the governor tripping speed or a speed in excess of 125 percent of the elevator rated speed, whichever is the lesser. Overhauling load conditions shall include all loads up to rated elevator loads for freight elevators and all loads up to 125 percent of rated elevator loads for passenger elevators. 620-92. Motor-Generator Overspeed Device. Motor-generators driven by direct-current motors and used to supply direct current for the operation of elevator machine motors shall be provided with speed-limiting devices as required by Section 430-89(c) that will prevent the elevator from attaining at any time a speed of more than 125 percent of its rated speed. 620-101. Emergency Power. An elevator can be powered by an emergency power system, provided that when operating on such emergency power there is conformance with Section 620-91. 70-664 NATIONAL ELECTRICAL CODE Exception: Where the emergency power system is designed to operate only one elevator at a time, the energy absorption means, if required, shall be permitted on the line side of the disconnecting means, provided all other requirements of Section 620-91 are conformed to when operating any of the elevators the system might serve. (a) Other Building Loads. Other building loads, such as power and light that can be supplied by the emergency power system, shall not be considered as means of absorbing the regenerated energy for the purpose of conforming to Section 620-91, unless such loads are using their normal power from the emergency power system when it is activated. (b) Disconnecting Means. The disconnecting means required by Section 620-51 shall disconnect the emergency power service and the normal power service.