Abstract: A device for providing a high tensile, electrically insulated connection ween two sections of the lead wire of an overhead power line is disclosed. The device is suitable for use as a line separator or phase separator of a lead wire which supplies power to the current collector of a railway vehicle. The device comprises spaced parallel, glass-fiber reinforced plastic insulating rods, each of the ends of which are connected with metal rods of the same outside diameter, and which are arranged in a common plane with the lead wire sections. Two tubular traverses extend transversely to the insulating rods and are rigidly connected to the metal rods at the ends of the insulating rods. A cable system is provided for suspending the device from a support cable. Also disclosed is a method of connecting the plastic rods with the metal rods to form high tensile connections, the metal rods having an axial clamping channel and the method including progressive radial compression of the metal rods about the plastic rods.