Abstract: A reverse wiring indicator for a GFCI receptacle alerts the installer in the event that the AC source has been improperly wired to the load or feedthrough terminals of the receptacle rather than to the source or input terminals. The reverse wiring indicator operates by open-circuiting one of the load or feedthrough terminals of the receptacle, and may take the form of a removable barrier which inhibits conduction through one of the power contact sets of the GFCI circuit breaker until the receptacle has been installed and successfully tested. The contact set through which conduction is inhibited is the one other than that to which the TEST switch is connected, and the other contact set is allowed to conduct in the normal manner.

Abstract: An electrical enclosure having a base, a cover, and hinge pivotally connecting the base and cover. The cover has a pair of ears, each provided with a key hole for receiving hinge pins mounted on the base. The pivot pins are provided with keys that align with notch portions of the key holes when the cover is disposed at an obtuse angle, preferably about 180.degree. with respect to the base. After assembly, the base is connected to a support which limits the range of pivotal movement of the cover to an angle less than 180.degree. so that the keys and notch portions can no longer be aligned. The base and cover have top, bottom and two side walls of substantially the same depth and the cover bottom wall has two cord receiving recesses extending inwardly about one-half the depth of the bottom wall to minimize the radius of bending of the cords inside the enclosure and minimize the size of the recesses.

Abstract: The light output of an electroluminescent panel is increased by using resonant transformation to increase the operating voltage across the panel to a level greater than the source or input voltage. This is accomplished by connecting the electroluminescent panel into a series resonant circuit whose capacitance value is made up at least in part of the intrinsic capacitance of the electroluminescent panel itself, and by choosing the inductance and capacitance values of the series resonant circuit to produce the desired output voltage across the electroluminescent panel. The resulting circuit is simple and low in cost, does not significantly add to the operating losses of the system, and takes advantage of the intrinsic capacitance of the panel in providing the desired resonant transformation.

Abstract: A lighting fixture housing has a lamp cavity and two electrical sockets adjacent the opposite sides of the housing in the lamp cavity. Side barriers are adjacent the opposite sides and overlie the sockets such that each socket is located between a barrier and a housing side and is recessed behind the barrier by a distance. Lamp receiving openings in the barriers are coaxially aligned with the sockets to permit a lamp to extend through the openings and connect the lamp to the sockets. A channel in one barrier has a first portion extending along a peripheral edge of the barrier and a second portion extending from the first portion and terminating in the lamp receiving opening of the barrier.

Abstract: A simple and inexpensive air-to-air heat exchanger for cooling an electrical equipment cabinet or the like comprises a plurality of connected sections which are substantially identical to each other. In one embodiment, each section comprises a channel for carrying a flow of air and at least one heat exchange fin extending outwardly from the channel for exchanging heat between the air in the channel and the air outside the channel. In a second embodiment, each section of the heat exchanger comprises two adjacent channels which are open along one side, and the channels are closed off to form air flow conduits when the heat exchanger sections are attached to each other.

Abstract: An electrical circuit card adapted to be removably received in a grounded, electrically conductive housing comprises an insulative circuit board, an insulative faceplate coupled to the circuit board along the front edge thereof, and an electrically conductive shielding strip behind the faceplate for reducing EMI emission. The shielding strip comprises an intermediate portion extending generally vertically along the rear surface of the faceplate, resilient upper and lower spring arms extending rearwardly at an angle from the intermediate portion, and upper and lower contact pads at the ends of the respective upper and lower spring arms. The upper and lower contact pads form planar contact areas which are disposed at an angle relative to the spring arms, and which are parallel to corresponding electrical contact surfaces provided on the housing.

Abstract: A partition for dividing an electrical or telecommunications device box having a substantially planar dividing member with at least one retaining member extending therefrom for cooperating with a mounting post on the base member of the box to support the dividing member substantially perpendicularly to the base member. The partition is removably retained in the box by the retaining member frictionally engaging the post. The retaining member has a specific amount of interference to cause the spring action in the material and to create gripping forces around the mounting post.

Abstract: An electrical receptacle assembly, such as for employment in a surge suppression unit, includes a generally rectangular two-piece housing having a front cover and a back cover separate from and mateable with the front cover, a generally U-shaped mounting bridge fitted over opposite top and bottom portions of the mated front and back covers, and a plurality of pairs of securement elements respectively defined on opposite top and bottom portions of the front and back covers and on opposite portions of the mounting bridge being disposed adjacent to the opposite top and bottom portions of the front and back covers. Selected ones of the pairs of securement elements on the front and back covers are interference fittable and latchable with selected ones of the pairs of securement elements on the mounting bridge for releasably securing the mated front and back covers to the mounting bridge.

Abstract: A barrier arrangement for use in a multiple-phase padmounted switchgear includes a pair of insulated upper and lower barrier panels mounted in spaced vertical tandem and stationary relation one above the other so as to define a gap therebetween and an insulated intermediate barrier panel disposed adjacent to the gap between the upper and lower barrier panels. The barrier panels are disposed within an enclosure of the switchgear between the pairs of multi-phase switchgear assemblies. The intermediate barrier panel is mounted to the upper barrier panel so as to undergo sliding movement between lowered and raised positions relative to the lower barrier panel so as to respectively open and close the gap between the upper and lower barrier panels in response to insertion and withdrawal of a transversely disposed additional barrier panel through the gap.

Abstract: A folded electrical box for mounting an electrical wiring device to a support member. Preferably, the electrical box is formed by folding a unitary blank of thin sheet material. In the preferred embodiment, the electrical box includes an integral mounting bracket. The mounting bracket has a pair of bracket portions extending outwardly from one side wall of the electrical box for coupling the electrical box to a support member. Each of the bracket portions has side mounting section extending from the electrical box for engaging one side of the support member extending perpendicular to the dry wall plaster and a face mounting section extending substantially perpendicularly from the side mounting section for engaging the side of the support member with the dry wall plaster secured thereto. The side mounting section of the mounting bracket is reinforced by folding the sheet material to double its thickness, while the face mounting section has a single thickness to avoid bulging the dry wall plaster.

Abstract: A pulling tool for gripping a cable or cables, especially fragile cables such as fiber optic cables. The pulling tool can pull such fragile cables with or without fragile connectors coupled to their free ends. The pulling tool has a mesh sleeve with an open tail end for receiving the ends of the cables, and a closed lead end with a ring or pulling member coupled thereto. The sleeve is constructed of a plurality of thin, flexible strands tightly interwoven together to form a longitudinally compressible and laterally expandable tube. The strands are tightly interwoven to prevent the cables or connectors from protruding outwardly from the sleeve. The sleeve is also highly flexible to permit the sleeve to be folded or rolled up.

Abstract: An electrical connector assembly 10 for transmitting electrical energy, and especially designed for use with electric vehicles. The electrical connector assembly 10 includes an electrical connector or plug 16 with electrical contacts, such as tubular brush contacts 34 and an electrical connector inlet assembly or receptacle 20 with mating electrical contacts such as contact pins 409. The plug has a cover 50 for selectively covering and uncovering its electrical contacts to prevent inadvertent contact with the electrical contacts. Likewise, the receptacle has a cover 460 for selectively covering and uncovering its electrical contacts to prevent inadvertent contact with the electrical contacts. The receptacle also has a retractable hood or weathershield 510 movably coupled thereto between a retracted position and an extended position. In the extended position, hood 510 partially covers plug 16.

Abstract: A fuse mounting bracket assembly for air-insulated, live front padmounted switchgear is provided that in a first configuration permits only one type of fuse to be selectively mounted in the bracket assembly and in a second configuration allows only a second different type of fuse to be selectively mounted in the bracket assembly. The bracket assembly includes a main frame having an end wall and two side walls with slots being provided in the side walls for pivotally receiving opposed, outwardly extending mounting protuberances on the selected one type of fuse. A pair of adapters may be selectively mounted on the frame assembly in blocking relationship to the slots and which present components that extend inwardly toward one another from respective side walls for engagement with a mounting hook on a second type of fuse, thus allowing the fuse mounting bracket assembly to be selectively configured for either of the two types of fuses with minimum overall parts requirements.

Abstract: An end fitting with stress distribution for supporting an end of a device, such as an insulator, placed tension. The end fitting has a mounting hole for receiving a cylindrical mounting pin therethrough. The mounting hole has a pair of contacting points spaced laterally relative to the vector line of force to redirect the tensile load applied to the end fitting by a mounting pin located in the mounting hole. The end fitting is especially useful in insulators subjected to tensile loads.

Abstract: A receptacle switch having a center-off position, momentary-on position, and maintained-on position. The switch includes a housing with a toggle, a first stationary contact, a second stationary contact and a third movably contact, and a leaf spring therein. The toggle has a cam member which engages a cantilever arm supporting third contact to hold the third contact spaced between the first and second contacts in center-off position. The cam member also controls movements of the third contact from its center-off position, to maintained-on position, and to its momentary-on position. The leaf spring selectively engages a first notch in a bottom portion of the toggle to maintain the toggle in the off position, or engages a second notch in the bottom portion of the toggle to maintain the toggle in the maintained-on position, or engages a smooth portion of the bottom portion of the toggle to momentarily maintain the toggle in its momentary-on position until the toggle is released.

Abstract: An electrical equipment cabinet utilizes a door-mounted, air-to-air heat exchanger for providing cooling to the equipment housed in the cabinet while maintaining a closed or sealed environment within the cabinet. An arrangement of ducts and vents is used to force interior and exterior air through the heat exchanger using powered fans mounted within the main portion of the cabinet. The mounting of the heat exchanger on or within the door of the cabinet makes more efficient use of the space available within the cabinet, and the placement of the fans within the main portion of the cabinet protects them from damage and avoids the need to provide electrical power to the door.

Abstract: An electrical outlet box assembly for separating and insulating high voltage power wires from low voltage communication wires. The electrical outlet box assembly includes a housing adapted to be embedded into a poured concrete floor, an electrical shielding assembly coupled within the housing, a leveling assembly for coupling and leveling an electrical receptacle to the housing, a floor plate or carpet flange, and a receptacle cover. The electrical shielding assembly includes a wiring enclosure releasably coupled to the housing by a snap fit having an interior passage for receiving and separating the high voltage power wires from the low voltage communication wires which pass over the exterior of the wiring enclosure, and a receptacle insulator member adapted to surround a receptacle mounted in the housing.