Patent ID: 7290334

Claim:
A method for connecting an electrical conductor ( 17 ) to a metal bar ( 11 ) by bolted connection, whereby a bushing ( 10 ) provided with a collar ( 12 ) is inserted into, and is by radial expansion fastened in, a hole in the metal bar, a cable lug ( 16 ) connected to the electrical conductor is caused to abut against the bushing, and the cable lug is connected to the bushing by means of a bolt ( 14 ) disposed in the bushing and forming part of the bolted connection, characterised by drawing an expansion device ( 23 ) with a threaded portion ( 26 ) and an expansion collar ( 25 ) through the bushing in order to expand the latter, rotating a fitting nut ( 20 ) with a thread ( 21 ) cooperating with the threaded portion ( 26 ) in abutment against the collar ( 12 ) of the bushing in order to grind a surface of the collar of the bushing and draw the expansion tool through the bushing, removing the expansion device ( 23 ) with the fitting nut ( 20 ) from the bushing and inserting a bolt through the bushing and pressing a tapered clamp ring ( 13 ) surrounding the bolt and abutting against a head ( 15 ) of the bolt into the bushing during radial widening of the bushing and radial constriction of the clamp ring round the bolt as a result of tightening of the bolted connection.