| 摘要 |
Disclosed is a heat resistant casing adapted to contain an electrical fitting. The casing includes a housing of fire resistant material having a top and supporting side-wall provided with at least one aperture. The housing includes an attachment means to enable an electrical fitting to be attached to and enclosed within the housing. Within the housing is a first solid fire-resistant intumescent material which lies between the interior surface of the top and the electrical fitting. The housing is of a self-supporting substantially rigid construction and includes a collar of a second solid fire-resistant intumescent material which extends substantially completely around the exterior surface of the side wall. The first solid fire-resistant intumescent material is provided with at least one aperture and is spaced apart from the interior surface of the top to form a gap so that in the event of a fire or excessive heating the first solid fire-resistant intumescent material can expand into the gap. |
