Abstract: The present invention is an electrical junction box of the type having side portions, a back portion, and an open face portion. A flange extends completely around the side portions. This flange is located sufficiently behind the open face of the box to leave a part of the side portions projecting forward of the flange. The projecting portion normally is equivalent in length to the thickness of the gypsum board, Sheetrock or other wall facing material being used. At least one wire or cable inlet extends outward from the side portions behind the flange for admitting electrical wiring into the junction box. These inlets will normally have a plurality of generally tubular apertures entering the interior of the box. Each aperture is originally sealed with a readily removable press-out diaphragm.