The Ground connection
The ground connector must be sufficiently dimensioned to provide good contact for the welding current load to be used. The positioning of the ground clamp determines how large a part of the vessel or of the  work piece is to be utilized as part of the welding current circuit.
The ground clamp should always be placed as close as possible to the welding area, or on the work piece itself if this is not an integral part of the hull. The thickness of material between welding point and ground clamp must be sufficient to carry the current load that is to be used. Think carefullybefore fixing the ground clamp so that sensitive machine parts such as ball bearings etc. are not used as a bridge for welding current.

There are three types of ground clamps available, the 200A, 400A and 600A. All Unitor ground
clamps also come with 3 m cable and connector.