Electricity: conductors and insulators – Boxes and housings – Hermetic sealed envelope type
Patent
1991-09-05
1994-01-18
Picard, Leo P.
Electricity: conductors and insulators
Boxes and housings
Hermetic sealed envelope type
174 51, 174 65R, 220 402, 220 403, H05K 500
Patent
active
052801322
ABSTRACT:
A plastic load center box economically provided by duplicate molded end sections joined by an intermediate section of uniform cross-section which is readily provided in selected lengths in either molded or extruded form. End walls receive metal inserts electrically interconnected to provide grounding when attached to grounded conduit, or plastic inserts where the load center application does not require grounded conduit. Molded end sections have formed knockouts and wire clamping tabs. A metal cover for the box is grounded to the metal inserts or to the interconnection. Additional plastic inserts in the end walls provide forwardly open pockets in which cable may be laid, and closing inserts overlying the pockets to grip the cable and retain it in the pockets.
REFERENCES:
patent: D318651 (1991-07-01), Sharp et al.
patent: D318652 (1991-07-01), Buchanan
patent: 3634598 (1972-01-01), Stanfield
patent: 3728470 (1973-04-01), Maier
patent: 3742119 (1973-06-01), Newman
patent: 4710853 (1987-12-01), Reinhardt
patent: 4731501 (1988-03-01), Clark et al.
patent: 5066832 (1991-11-01), Clarey et al.
"Trilliant".TM. Home Power System, Square D Co., Copyright 1990, Catalog SD470, 12 pages.
Clarey Robert J.
Reiner Richard A.
Eaton Corporation
Picard Leo P.
Tone David A.
Vande Zande L. G.
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