COMMERCIAL GARAGES, REPAIR AND STORAGE 70-505

(c) Grounded Conductor. Where a circuit that supplies portables or pendants includes a grounded conductor as provided in Article 200, receptacles, attachment plugs, connectors, and similar devices shall be of polarized type, and the grounded conductor of the flexible cord shall be connected to the screw shell of any lampholder or to the grounded terminal of any utilization equipment supplied. (d) Attachment Plug Receptacles. Attachment plug receptacles in fixed position shall be located above the level of any defined Class I location or be approved for the location. 511-7. Equipment Above Class I Locations. (a) Arcing Equipment. Equipment that is less than 12 feet (3.66 m) above the floor level and that may produce arcs, sparks, or particles of hot metal, such as cutouts, switches, charging panels, generators, motors, or other equipment (excluding receptacles, lamps, and lampholders) having make-and-break or sliding contacts, shall be of the totally enclosed type or so constructed as to prevent escape of sparks or hot metal particles. (b) Fixed Lighting. Lamps and lampholders for fixed lighting that is located over lanes through which vehicles are commonly driven or that may otherwise be exposed to physical damage shall be located not less than 12 feet (3.66 m) above floor level, unless of the totally enclosed type or so constructed as to prevent escape of sparks or hot metal particles. 511-8. Battery Charging Equipment. Battery chargers and their control equipment, and batteries being charged, shall not be located within locations classified in Section 511-3. 511-9. Electric Vehicle Charging. (a) Connections. Flexible cords and connectors used for charging shall be suitable for the type of service and approved for extra-hard usage. Their ampacity shall be adequate for the charging current. (b) Connector Design and Location. Connectors shall be so designed and installed that they will disconnect readily at any position of the charging cable, and live parts shall be guarded from accidental contact. No connector shall be located within a Class I location as defined in Section 511-3. (c) Plug Connections to Vehicles. Where plugs are provided for direct connection to vehicles, the point of connection shall not be within a Class I location as defined in Section 511-3, and, where the cord is suspended from overhead, it shall be so arranged that the lowest point of sag is at least 6 inches (152 mm) above the floor. Where the vehicle is equipped with an approved plug that will disconnect readily and where an automatic arrangement is provided to pull both cord and plug beyond the range of physical damage, no additional connector shall be required in the cable or at the outlet. 511-10. Ground-Fault Circuit-Interrupter Protection for Personnel. All 125-volt single-phase 15- and 20-ampere receptacles installed in areas where electrical diagnostic equipment, electrical hand tools, or portable lighting devices are to be used shall provide ground-fault circuit-interrupter protection for personnel. 70-506 NATIONAL ELECTRICAL CODE