Box for electric wiring in concrete wall, has double left-hand spout provided with spout closing off both openings including membrane or sheet that is punctured when introducing installation pipe in spout

摘要

The box (1) has a concrete wall with a circumferential wall (2) at a side facing away from a bottom (3) that defines an access opening (5), where the box is provided with a number of double left-hand spouts (7) projecting from the wall for connecting an installation pipe. The spout is provided with spout closing off both openings (8a, 8b) including a membrane or sheet that is punctured when introducing the pipe in the spouts. The membrane or sheet provided is spaced apart from the wall, and is situated at respective end of the spouts.