An electrical enclosure includes a first part and a second part together forming a body. The body has an inner surface and an outer surface that are separated on opposing surfaces of the body. An outer junction is adjacent the outer surface of the body and an inner junction adjacent the inner surface of the body. Conductive pass-throughs that are at least partially contained within the body electrically couple the inner and outer junctions. An external conductor routing high-voltage from a high-voltage source in the building structure is coupled to the outer junction and mechanically fixed thereto, enclosed by a cover engaging the outer surface sufficiently to provide fire protection and prevent degradation, and such that no portion of the external conductor passes through the body into the inner surface. The second part is removable through the first part thereby providing access to the outer junction through the first part.