Section R. 408.11844 - EquipmentRule 1844.
(1) Electrical equipment shall be located or enclosed so that live parts are not exposed to accidental contact under normal operating conditions.(2) Electric equipment shall be protected from dirt, grease, oil, and moisture.(3) Guards for live parts shall be substantial and located so that they cannot be accidentally deformed to make contact with live parts.(4) Enclosures for resistors shall have openings to provide adequate ventilation and shall be installed to prevent the accumulation of combustible matter too near to hot parts. Resistor units shall be supported to be free as possible from vibration.(5) The power supply to the runway conductors shall be controlled by a switch or circuit breaker that is located on a fixed structure, is accessible from the floor, and is capable of being locked in the open position. A switch or circuit breaker that is of the enclosed type and is capable of being locked in the open position shall be provided in the leads from the runway conductors on a cab-operated crane. A means of opening the switch or circuit shall be located within reach of the operator. A switch or circuit breaker that is of the enclosed type and is capable of being locked in the open position shall be provided in the leads from the runway conductors on a floor-operated crane. The disconnect shall be mounted on the bridge or foot-walks near the runway conductors. One of the following types of floor-operated disconnects shall be provided:(a) Nonconductive rope attached to the main switch.(b) An under-voltage trip for the main circuit breaker operated by an emergency stop button in the pendant push button in the pendant pushbutton station.(c) A main line contactor operated by a switch or pushbutton in the pendant pushbutton station.(6) A crane using a lifting magnet shall have a separate magnet circuit switch that is of the enclosed type and is capable of being locked in the open position. Means for discharging the inductive load of the magnet shall be provided.(7) Runway conductors of the open type mounted on the crane runway beams or overhead shall be located or guarded so that persons entering or leaving the cab or crane foot-walk will not come into contact with them. On the effective date of this rule, open type conductors shall not be installed on cab-operated runway beams.(8) When a service receptacle for an extension lamp is provided in the cab or on the bridge of a cab-operated crane, it shall be a grounded 3-prong type permanent receptacle and shall not be more than 300 volts.Mich. Admin. Code R. 408.11844
2002 AACS; 2013 AACS; 2018 MR 3, Eff. 2/8/2018