PROSPC TRK RECS FLOATING SPLICE BOX. The Floating Splice Box is used to feed the track from a point located away from thetrack end. Hardware is supplied to mount the splice box a maximum of 4′ from the feed end of the track. (5) 7/8″ diameter knock outs are available to accept standard 3/8″ or 1/2″ trade size electrical connectors (by others). The splice box has a wiring volume of 21.34 cu. in. (5) 12 ga. wires max. may be installed in the wire channel of the track.