Abstract: In an assembly comprising an electrically conducting bar, lower and upper electrically insulating films covering opposed faces of the conducting bar, and an electrically insulating member bonded to the upper insulating film, the insulating member protruding on the exposed face of the insulating film so as to prevent propagation of electric arcs by tracking on said exposed face, the insulating member is bonded to the insulating film with a heat-sealable coating.

Abstract: This system for electrically connecting and fastening at least one plate-type electrical conductor onto a support piece provided with a threaded pin designed to be engaged in a corresponding hole of conductor and to cooperate with a nut for screwing conductor onto support piece, is characterized in that an annular spacer of electrically conductive material is joined to conductor on the side of this conductor that is facing the support piece and in that nut is positioned on the other side of conductor, and is joined to spacer by coupling means allowing the rotation of the nut relative to the spacer and a determined course of axial movement for nut relative to this spacer, between a position of assembling distant from the conductor and a position for screwing in which the nut is supported against the conductor, in order to facilitate the positioning and then the screwing of the conductor against the support piece.

Abstract: This system for electrically connecting and fastening at least one plate-type electrical conductor to a support piece provided with a nut designed to cooperate with a fastening screw of the conductor is characterized in that an annular spacer of electrically conductive material is joined to support piece on the side of this piece that is facing the conductor and in that nut is disposed on the other side of the support piece opposite this spacer and is connected to this spacer by floating coupling means designed to extend through a corresponding hole in this support piece and to prevent at least the nut from rotating on this piece.