I. General
(A) Contact Conductor. Contact conductors shall not be required to be enclosed in raceways.
(B) Exposed Conductors. Short lengths of exposed con- ductors at resistors, collectors, and other equipment shall not be required to be enclosed in raceways.
(C) Flexible Connections to Motors and Similar Equip- ment Where flexible connections are necessary, flexible stranded conductors shall be used. Conductors shall be in flexible metal conduit, liquidtight flexible metal
610.1 Scope. This article covers the installation of
electrical equipment and wiring used in connection with
cranes, monorail hoists, hoists, and all runways.
FPN: For further information, see ANSI B30, Safety Code for
Cranes, Derricks, Hoists, Jacks, and Slings.
610.3 Special Requirements for Particular Locations.
(A) Hazardous (Classified) Locations. All equipment that operates in a hazardous (classified) location shall conform to Article 500.
(1) Class I Locations. Equipment used in locations that are hazardous because of the presence of flammable gases or vapors shall conform to Article 501.
(2) Class II Locations. Equipment used in locations that are hazardous because of combustible dust shall conform to Article 502.
(3) Class III Locations. Equipment used in locations that are hazardous because of the presence of easily ignitible fibers or flyings shall conform to Article 503.
(B) Combustible Materials. Where a crane, hoist, or monorail hoist operates over readily combustible material, the resistors shall be located as permitted in the following:
(1) A well ventilated cabinet composed of noncombustible material constructed so that it does not emit flames or molten metal
(2) A cage or cab constructed of noncombustible material that encloses the sides of the cage or cab from the floor to a point at least 150 mm (6 in.) above the top of the resistors
(C) Electrolytic Cell Lines. See 668.32.
II. Wiring
610.11 Wiring Method. Conductors shall be enclosed in raceways or be Type AC cable with insulated grounding conductor, Type MC cable, or Type MI cable unless other wise permitted or required in 610.11(A) through (E).
conduit, liquidtight flexible nonmetallic conduit,
multiconductor cable, or an approved nonmetallic
flexible raceway.
(D) Pushbutton Station Multiconductor Cable. Where multiconductor cable is used with a suspended pushbutton station, the station shall be supported in some satisfactory manner that protects the electrical conductors against strain.
(E) Flexibility to Moving Parts. Where flexibility is re quired for power or control to moving parts, a cord suitable for the purpose shall be permitted, provided the following apply:
(1) Suitable strain relief and protection from physical damage is provided.
(2) In Class I, Division 2 locations, the cord is approved for extra-hard usage.
610.12 Raceway or Cable Terminal Fittings. Conductors leaving raceways or cables shall comply with either
610.12(A) or (B).