Michigan Administrative Code › Department - Labor and Economic Opportunity › MIOSHA › General Industry and Construction Safety and Occupational Health Standards › General Industry Safety Standards › Part 18 - OVERHEAD AND GANTRY CRANES › CONSTRUCTION, INSTALLATION AND EQUIPMENT › Section R. 408.11843 - Controls

Current through Vol. 24-12, July 15, 2024
Rule 1843.
(1)
						A pendant, radio, cab, pulpit control station, and a controller in a cab
						operated crane shall be permanently identified by function and direction.
						Control boxes shall be constructed to prevent electrical shock.
(2) Rope controls for a floor-operated crane
						shall be equipped with an arrow attached to the rope showing the direction of
						travel when the rope is pulled.
(3)
						A pendant, radio, cab, or pulpit control station shall be equipped with a
						positive stop device, colored red, to disconnect all motors.
(4) A crane shall be equipped with a main
						switch which can be locked out. An employer shall establish a written lockout
						procedure which shall be used in connection with
						R
						408.11872 and
						R
						408.11875. Lockout shall conform to the requirements
						prescribed in General Industry Safety Standard Part 85 "The Control of
						Hazardous Energy Sources, (Lockout/Tagout)," as referenced in
						R
						408.11807.
(5) A controller on a rope, pendant, or
						radio-controlled crane, when released from the "on" position, shall
						automatically return to the "off" position.
(6) A transmitter for a radio-controlled
						crane shall be stored in a locked cabinet or in a supervised storage area when
						not in use.
(7) All cranes shall
						have an operable over-travel limit switch in the hoisting direction. The switch
						shall be located so that it is tripped under all conditions to prevent contact
						of the hook or block with the hoist.
(8) A crane that is not equipped with spring
						return controllers or momentary contact push buttons shall have a device which
						will disconnect all motors from the line if power fails and which will not
						permit restarting until the controller handle is brought to the off position or
						a reset switch or button is operated.
(9) The control circuit voltage shall not be
						more than 600 volts for A.C. or D.C. current.
(10) The voltage at pendant push-buttons
						shall not be more than 150 volts for A.C. and 300 volts for D.C.
(11) If multiple conductor cable is used with
						a suspended push-button station, then the station shall be supported in a
						manner that will protect the electrical conductors against strain.
(12) Cab-operated cranes shall have
						lever-operated manual controllers and master switches that have a spring-return
						arrangement, off-point detent, or off-point latch. The controller operating
						handle shall be located within reach of the operator and, as far as
						practicable, the movement of each controller handle shall be in the same
						general directions of the resultant movements of the load.
(13) Equipment and wiring shall be as
						prescribed in General Industry Safety Standard Part 39 "Design Safety Standards
						for Electrical Systems," as referenced in
						R
						408.11807.
(14) The control for the bridge and trolley
						travel shall be located so that the operator can face the direction of
						travel.
(15) Push buttons in
						pendant stations shall return to the above position when released by the
						operator.
(16) Automatic cranes
						shall be designed so that all motions will failsafe if any malfunction of
						operation occurs.
(17) A
						remote-operated crane shall function so that if the control signal for any
						crane motion becomes ineffective, the crane motion shall stop.