Patent ID: 8809701

Claim:
A connecting device for electrical junction boxes, comprising a sleeve member that can be inserted in a first hole in a first wall of a first box and in a second hole provided in a second wall of a second box, said sleeve joining said first box and said second box to one another, and further comprising an annular gasket fitted around the sleeve and located between said first wall and said second wall, wherein said sleeve has a first end, provided with a plate disposable internally to said first box, and a second end provided with at least one abutment element that is engageable with an inner side of said second wall; further comprising a wedge member insertable between said plate and said first wall so as to move said plate away from an inner side of said first wall and to push said first wall and said second wall against each other, whereby said boxes are held to one another and said gasket is compressed between said first wall and said second wall.