Abstract: A disconnectable power-cable connector with a bus-shaped connection blade, in which a solid connecting member is wider at one end, and a matching wedge-shaped contact housing is open along one side. The connection member is fastened to the wedge-shaped contact housing in vicinity of the blade. A cable has an end that extends into the connecting member which is insertable into the contact housing perpendicularly to the longitudinal axis of the contact housing. A bar extends across the top surface of a receptacle for the connecting member, and rests on top of the connecting member after having been into the contact housing.

Abstract: A direct current arc furnace, includes a graphite cathode; and a container forming a hearth with a hearth base surface and having a container bottom acting as anode. The container bottom includes a supporting copper-plated sheet steel base consisting of a steel sheet and a copper plating plated on the steel sheet; electrical connection means extending through the steel sheet to contact the copper plating to supply an anode current to the copper plating; and a refractory brick lining having a graphite content above the copper-plated sheet steel base with the copper-plated layer adjacent the brick lining. In a preferred embodiment the graphite content in the brick lining decreases from the vicinity of the copper-plated sheet steel base to the vicinity of the hearth base surface.