A system having a plug and a housing having a hollow space at least partially sealed and an electrical supply line, which is connected to an electrical component, which is separated from the space by a pass-through region, which has a first sealing arrangement that seals in media-tight fashion, the line being surrounded at least partially by the first sealing arrangement, and being contactable in the space, the plug having at least one electrical contact for contacting the line and having at least one second sealing arrangement, which is such that for a contacting, the hollow space is sealed in media-tight, the line of the housing and/or the first sealing arrangement having at least one first locking arrangement, and the electrical contact of the plug having at least one second locking arrangement, the locking arrangements providing that for a contacting, an exclusively irreversible positive and/or non-positive locking is provided.