2.4.4 Types of Power Supply

Power must be supplied to the crane along the length of the supporting structure or track, usually referred to as the down shop supply. It must also be supplied across the crane bridge to the crab or hoist unit. There are several systems in use, each with variations from different manufacturers. However, they can conveniently be grouped into a few basic types.

For general guidance on each of the above refer to section 1A6.3 of this code.