초록 ▼

A prefabricated junction box and lid for use in the floors, walls and ceilings of a building. The junction box has tubular projections extending from an exterior sidewall and sealed by removable knockouts. When a knockout is removed, an annular ring extends into an interior of the tubular projection

A prefabricated junction box and lid for use in the floors, walls and ceilings of a building. The junction box has tubular projections extending from an exterior sidewall and sealed by removable knockouts. When a knockout is removed, an annular ring extends into an interior of the tubular projection so as to retain corrugated electrical conduit inserted therethrough. The junction box lid includes locking tabs aligned with each tubular projection which substantially improve the capacity of the box to retain electrical conduit. The annular ring and corresponding locking tab, in combination, are operative to engage against an outer surface of the corrugated electrical conduit so as to lock the conduit.

대표청구항 ▼

[ I claim:] [1.] A prefabricated plastic junction box for use in interconnecting corrugated electrical conduit, comprising:(a) a housing with an exterior sidewall;(b) at least two tubular projections extending outwardly from said exterior sidewall and dimensioned internally to slidably receive corru

[ I claim:] [1.] A prefabricated plastic junction box for use in interconnecting corrugated electrical conduit, comprising:(a) a housing with an exterior sidewall;(b) at least two tubular projections extending outwardly from said exterior sidewall and dimensioned internally to slidably receive corrugated electrical conduit, each tubular projection including a hollow interior and a frangible knockout formed therein, said frangible knockout dimensioned to leave an annular ring having a diameter large enough to snugly pass said corrugated electrical conduit when said frangible knockout is removed; and(c) a first removable body with locking tabs extending outwardly therefrom, each locking tab dimensioned to fit between a pair of corrugations of the corrugated electrical conduit when said first removable body is fitted to an opening in said housing so as to press said corrugated electrical conduit against said annular ring and lock the electrical conduit to the junction box preventing movement of said conduit along the axis of said tubular projection.