Abstract: A connector for joining an end of an electrical resistance heating wire of an electrical heating cable enclosed in water-tight tubing with an end of the wire of an insulated electrical conductor comprises a heat-absorbing electrically conductive core member to receive and be clamped onto the wire ends, a rigid sleeve forming an elongate cavity to receive the core member with the wire ends fastened thereto, electrical insulation inside the sleeve between it and the core member and the wire ends, and a coupling ring fixed onto each end of the sleeve, one of the coupling rings having structures connected to it for clamping it substantially immovably onto an end portion of the cable-enclosing tubing and the other coupling ring having structures connected to it for forming a substantially water-tight joint between it and the insulated conductor.