The present application provides a fastening device for a lead wire, which has a rotating unit and a receiving frame base, the rotating unit having a receiving hole that penetrates the rotating unit and can receive the attached lead wire, the receiving frame base having a mounting portion and a receiving body for Receiving the rotary unit comprises, the receiving body having a first receiving body part and a second receiving body part, the first receiving body part and the second receiving body part being connected to one another, the first receiving body part and the second receiving body part being at least partially separable from one another, so that the rotation unit in an inner Can be placed in the area of the receiving body, characterized in that the rotation unit is provided with a plurality of first fastening elements, the receiving body with at least one second n fastening element is provided, and wherein the first fastening element and the second fastening element can fasten the rotary unit rotatably in the receiving body.
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