Abstract: A connector of the insulation-perforating type for a suspended electrical system comprises conductive means for cutting an insulating covering of an insulated supply cable in order to connect an electrical device electrically to an uncovered portion of the supply cable, and an insulating structure for enclosing the conductive means, in which the insulating structure includes a first insulating element which can be closed around the supply cable in a non-reversible manner in order to protect the uncovered portion from manual contact, and a second insulating element which can be connected to the electrical device and which can be joined reversibly to the first insulating element, the first insulating element comprising means for preventing sliding along the supply cable.