The cable drum or extension cable should be splash-proof. This is indicated with the IP44 designation. The sockets must have self-closing lids. The couplings must also be lockable with a lid. The plugs must be equipped with a sealing bead. The cable must be at least H07RN-F or correspond to this quality in the industrial and trade sector. The cable quality and the protection class are decisive for this. Our products are marked accordingly in the catalog.