Hollow wall electrical installation box for installation into walls e.g. fireproof walls, has sealing body combined with grid-like structure formed in material region or film, where sealing body is made of fire-resistant material

摘要

The box has a complementary part (3) integrally formed with a bottomless sleeve (1), and releasably secured at the sleeve, where the complementary part includes a radially divided elastically deformable sealing body (4) that is held a desired location of the complementary part. The complementary part includes an annular chamber in which the sealing body is axially non-relocatably retained. The sealing body is combined with a grid-like structure formed in a material region or a film, where the sealing body is made of a fire-resistant or non-combustible material i.e. foam material. The grid-like structure is made of a plastic film i.e. polyethylene or glass fibers.