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A power transfer device adapted for interconnection with the electrical system of a building includes a housing that includes a base having a back wall and an intermediate member that engages the base. A first housing section engages the base and the intermediate member and defines a first interior

A power transfer device adapted for interconnection with the electrical system of a building includes a housing that includes a base having a back wall and an intermediate member that engages the base. A first housing section engages the base and the intermediate member and defines a first interior portion. A second housing section engages the base and the intermediate member and cooperates with the base to define a second interior portion. Fasteners secure the intermediate member, the first housing section and the second housing section together. Power transfer switching components are interconnected with and carried by one of the housing sections. A cover may be pivotably mounted to the housing.

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1. A power transfer arrangement comprising: a base having a back wall;an intermediate member that engages the base and that defines first and second areas of the base on opposite sides of the intermediate member;a first housing section that engages the base and the intermediate member and that coope

1. A power transfer arrangement comprising: a base having a back wall;an intermediate member that engages the base and that defines first and second areas of the base on opposite sides of the intermediate member;a first housing section that engages the base and the intermediate member and that cooperates with the first area of the base to define a first interior portion;a second housing section that engages the base and the intermediate member and that cooperates with the second area of the base to define a second interior portion;an engagement structure associated with the base, the intermediate member, the first housing section and the second housing section for engaging the base, the intermediate member, the first housing section and the second housing section together; andpower transfer switching components interconnected with and carried by at least one of the first housing section and the second housing section. 2. The power transfer arrangement of claim 1 wherein the intermediate member and the base include a second engagement structure that provides movable engagement of the intermediate member with the base. 3. The power transfer arrangement of claim 2 wherein the intermediate member includes at least one bore, and further comprising a fastener extending through the at least one bore for securing the intermediate member to the back wall. 4. The power transfer arrangement of claim 1 wherein the power transfer switching components are secured to the first housing section, and further comprising one or more lead wires extending from the power transfer switching components through the first interior portion and the intermediate member into the second interior portion. 5. The power transfer arrangement of claim 4 wherein the intermediate member includes an opening through which the one or more lead wires extend between the first and second interior portions. 6. The power transfer arrangement of claim 5 further comprising a strain relief member movably mounted to the intermediate member and generally aligned with the opening, wherein the strain relief member is operable to hold the one or more lead wires against the back wall. 7. The power transfer arrangement of claim 1 wherein the base includes a pair of sidewalls that extend from the back wall, and wherein the intermediate member is located between the sidewalls, and wherein the first and second housing sections are engaged with and extend between the sidewalls. 8. The power transfer arrangement of claim 1 further comprising a cover movably mounted to one of the housing sections for selectively permitting and preventing access to the power transfer switching components. 9. The power transfer arrangement of claim 8 wherein the cover is removably engaged with one of the housing sections. 10. The power transfer arrangement of claim 8 wherein the base, the first housing section, the second housing section, and the cover are formed of rust-resistant material. 11. The power transfer arrangement of claim 10 wherein the rust-resistant material comprises a plastic material. 12. A transfer switch arrangement comprising: a base having a first section and a second section;an intermediate member removably coupled to the base;a first housing section that cooperates with the first section of the base and the intermediate member to define a first compartment;a second housing section that cooperates with the second section of the base and the intermediate member to define a second compartment;power transfer switching components interconnected with and carried by at least one of the first housing section and the second housing section; andat least a pair of fasteners, wherein a first one of the fasteners secures the base, the intermediate member and the first housing section together, and wherein a second one of the fasteners secures the base, the intermediate member and the second housing section together. 13. The transfer switch of claim 12 further comprising a strain relief member attached to the base and extending over an opening formed in the intermediate member, wherein the opening provides passage of lead wires from the power transfer switching components from one of the compartments to the other compartment. 14. The transfer switch of claim 12 wherein the base includes a channel within which the intermediate member is engageable. 15. The transfer switch of claim 14 wherein the first and second housing sections define front wall portions that align with each other when the first and second housing sections are mounted to the base member. 16. The transfer switch of claim 15 wherein the first and second housing sections further include a lip structure that extends from the front wall portions and overlaps edges defined by the base. 17. The transfer switch of claim 16 wherein the base includes a back wall that defines a top edge and a bottom edge, and a pair of sidewalls that define side edges, wherein the top, bottom and side edges are overlapped by the lip structure. 18. In a power transfer device for supplying power from an auxiliary power source to an electrical system of a building, wherein the power transfer device includes a housing and a series of switches mounted to the housing and interconnected with the building electrical system, the improvement comprising: a base defined by the housing;a first section defined by the housing which overlies and cooperates with a first area of the base to form a first exterior portion of the housing that defines a first internal cavity, wherein the switches are mounted to a front wall defined by the first section of the housing;a second section defined by the housing and engageable with the base, wherein the second section overlies and cooperates with a second area of the base spaced from the first area of the base, and that cooperates with the second area of the base to form a second exterior portion of the housing that defines a second internal cavity;wherein the base, the first section and the second section cooperate to define an exterior of the housing;a divider located between and separating the first internal cavity and the second internal cavity, wherein the first and second internal cavities are separate from each other with the divider located therebetween;one or more lead wires interconnected with and extending from the switches, wherein the lead wires extend through the first internal cavity and the divider and define ends extending into the second internal cavity;a power input connected to the lead wire ends within the second internal cavity for establishing an electrical connection between the auxiliary power source and the switches; andwherein the second section of the housing is removable from the base and is configured to selectively enclose the second internal cavity for preventing access to the ends of the lead wires. 19. The improvement of claim 18 wherein the divider comprises an intermediate member secured to the base. 20. The improvement of claim 19 wherein the base, the intermediate member, and the first and second sections of the housing are secured together using one or more fasteners. 21. The improvement of claim 20 wherein the first section of the housing is secured to the base by one or more first fasteners that extend between and interconnect the base, the intermediate member and the first section of the housing, and wherein the second section of the housing is secured to the base by one or more second fasteners that extend between and interconnect the base, the intermediate member and the second section of the housing. 22. The improvement of claim 19 wherein the one or more lead wires extend through an opening in the intermediate member, and further comprising a strain relief member that engages the one or more lead wires and secures the one or more lead wires against the base.