The heating conductor (resistance wire) made of CuNi or NiCr alloy is spirally wound on a fiberglass support. The resulting individual wires are connected in series by means of crimp sleeves. To protect against humidity, the crimp fittings are insulated with a heat-shrinkable sheath and the heating conductors are coated with a silicone sheath. Power is supplied by individual PTFE strands permanently connected. The heating cable can optionally be covered with a fiberglass tube. This contributes to the vacuum impregnation of the motor for a better connection with the impregnation resin. A specific adjustment to the power and the length of the heating strip is possible.