PDFWAC 296-307-37003

Cranes, hoists, and runways.

The installation of electric equipment and wiring used with cranes, monorail hoists, hoists, and all runways must meet the following requirements:
(1) Disconnecting means must meet the following requirements:
(a) A readily accessible disconnecting means is provided between the runway contact conductors and the power supply.
(b) Another disconnecting means, capable of being locked in the open position, is provided in the leads from the runway contact conductors or other power supply on any crane or monorail hoist.
(i) If this additional disconnection means is not readily accessible from the crane or monorail hoist operating station, means is provided at the operating station, to open the power circuit to all motors of the crane or monorail hoist.
(ii) The additional disconnect may be omitted if a monorail hoist or hand-propelled crane bridge installation meets all of the following:
(A) The unit is floor controlled;
(B) The unit is within view of the power supply disconnecting means; and
(C) No fixed work platform has been provided for servicing the unit.
(2) A limit switch or other device must be provided to prevent the load block from passing the safe upper limit of travel of any hoisting mechanism.
(3) The dimension of the working space in the direction of access to live parts that may require examination, adjustment, servicing, or maintenance while alive must be a minimum of 2 feet 6 inches. Where controls are enclosed in cabinets, the door must either open at least 90 degrees or be removable.
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-21-091, § 296-307-37003, filed 10/20/20, effective 11/20/20. WSR 97-09-013, recodified as § 296-307-37003, filed 4/7/97, effective 4/7/97. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. WSR 96-22-048, § 296-306A-37003, filed 10/31/96, effective 12/1/96.]