A plug-in termination of a single-phase conductor in a power cable termination assembly for submerged use. A first barrier separates an outer pressure-compensated housing from the sea. A second barrier separates an inner pressure-compensated housing from the outer pressure-compensated housing. The single-phase conductor runs through the first and second barriers and is secured in the inner pressure-compensated housing by its end being terminated within an insulator body insertable into the inner housing. The unsheathed conductor end is electrically connected within the insulator body to a conducting pin which is fixedly embedded by molding into the insulator body.