Perfected built-in housing in prefabricated panels for building for the passage of electric and similar cables from one panel to another. (Machine-translation by Google Translate, not legally binding)

摘要

Improved step box recessed in prefabricated panels for building, for the passage of electrical cables and the like from one panel to another; constituted by a frustoconical hollow body in whose lower end can be joined a tube for the passage of said electric conductors, characterized in that said smaller end of the frusto-conical body is provided with an external neck for the insertion of a tube of the larger diameter and at least one inner neck of smaller diameter with respect to the outer neck for the insertion of a tube of smaller diameter, said inner neck being disposed coaxially inside the outer neck and being connected to the latter by means of a suitable fracturable partition to consent to the breakage and transportation of the inner neck in the case that said box is foreseen for use with the larger diameter tubes. (Machine-translation by Google Translate, not legally binding)