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Sectional Electrical Boxes

[Category : - Construction Processes & Equipment]
[Viewed 1901 times]

Flush mount and surface mount sectional electrical box assemblies is provided. In the flush mount electrical box, the front section has a clamping member (24) with a clamping arm (21) and a clamping tongue (22). A yoke boss (20), a mounting bracket guide (50), a snap recess (40) and a perimeter male interlock (26) is also on the front section of the flush mount box. The rear section of the flush mount box includes, a perimeter female interlock (28), a yoke post (30), a clamp guide (32), a mounting bracket (48), a snap tab (42), a cable grip ramp (36), a cable retaining wall (38), an anchor flange (34), and a cable hanger (78). When the front section of the flush mount box engages the rear section, the cable clamps (24) press the wiring against the cable grip ramp (36). The snap tab (42) and snap recess (40) hold the sections together.
A fastener through the yoke boss (20) and into the yoke post (30, 110) holds the sections together. The yoke post (110) is used when the front section is extended in depth. The mounting bracket (48), screw head cavity (55), the anchor flanges (34, 43, 44, 88, 108), spring-loaded flags (120), and a stud clamp (130) attach the flush mount box sections to a support structure. A ceiling fan rear section has a cavity (86) to receive a support structure. In the gangable flush mount box, the sections have a gang channel (94) and a gang boss (92) with a gang snap (96), a gang recess (98) and a sway clip (114) holding the sections together. The ganged low voltage section has open cable ports (90, 102), short yoke boss (97), and a wire harness (100).
When the front section of the flush mount box fits inside the rear section, the yoke boss (20) can be outside the front section and the yoke post (30) parallel with the rear section. In surface mount sectional electrical box assembly, a side wall cable clamp (66) with a snap tab cut-out (74) can be added. When the cable clamp (24) aligns with the yoke post (30), an elongated yoke post cut-out (64) in the clamp arm (21) is necessary. Wire molding joining the surface mount box with a molding tab (68) inserting in molding base (75), a molding cover (76), a wire hanger insert (70), and an assortment of molding connectors. A molding base (75) having an integrally molded combination raceway (67). A conduit fitting (142) engages a cable port (62) or an elongated rectangular conduit knock-out (59).
A further embodiment provided is complete electrical box assemblies with the clamp grip ramp (36) in front of the clamp member (24).

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The design of the cable clamp and cable grip ramp allow for the easy feeding of conductor through the cable port. Fig. 19 shows the electrical box as a complete assembly. The designs consider mold release. The designs better than Eaton’s Crouse-Hinds quick entry port? The wire molding configurations Fig.’s 7 & 7A, would be great in residential re-wiring with surface mounted electrical boxes Fig.’s 5&6. The surface mounted box could also be attached to an existing electrical box. NEC states that high voltage electrical boxes have no mechanical fasters (means) holding the box together. The sectional boxes used in low voltage only or bonded for high voltage boxes? A manufacture’s instructions trump NEC.

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Patent publications:

US 8088998

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maynard (United States)

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