US Patent 7381900 Power cable for direct electric heating system

Electric power cable used as a riser (15) and/or feeder cable (16) in a Direct Electric Heating system for oil or condensate pipelines (10), comprising at least two conductors (1, 5) and insulation layers (3, 6). An outer concentric conductor (5) is connected to a near end of the pipeline, and a central conductor (1) is connected via a piggyback cable (12) to a far end of the pipeline, to provide power for the heating. Another aspect is a terminal assembly adapted to providing an electric connection of the electric power cable with the pipeline (10), where a cone (41) is adapted to squeeze the concentric conductor (5) against a concentric conductor adapter (40).