Abstract: An electrical outlet box for raised floors is formed as a metal box (10) in which electrical sockets (20) or switches can be mounted in the bottom; the box has a lid assembly (14) which is vertically adjustable relative to the box by means of a pawl (62, 63) and ratchet (67, 68) arrangement. This arrangement enables rapid adjustment of the vertical distance between the lid and box so that different thicknesses of floor covering can be allowed for.

Abstract: An explosion proof power supply enclosure for hazardous atmosphere lighting systems having multiple, identical explosion proof inlet and outlet openings to handle both high voltage AC circuits and low voltage DC intrinsically safe circuits. Each enclosure has thick, flat metal plate end walls and a plurality of identical circular openings located side-by-side in such walls. Each opening has an internal smooth walled surface configuration defining one side of a flame-quenching path. For AC power connections, explosion-proof receptacles are fitted in some of the openings with each receptacle having external surface configurations that define the other side of the flame quenching path.

Abstract: Flanged conduit and flanged insulation for anchoring electric wires along a wall and floor is shown for use by inserting the flange into a preexisting gap.