the present disclosure can best be describe by reference to the figures , wherein fig2 - 6 include plug - in outlet box 50 as depicted in fig2 includes a molded plastic base 27 formed from a phenylene - oxide plastic sold by general electric company under the trademark “ noryl ” or a polybutylene terepthalate which is sold under the general electric trademark “ valox ”. the base is molded to include a planar bottom 28 to which press - fit tabs 52 are preferable molded perpendicular thereto for securing to outlet box 50 to a busway aluminum housing , not shown . a planar top portion 33 defines a plurality of rectangular slots 34 - 37 that are off - set from each other to accommodate the upstanding contact blade tabs , not shown . also formed within the planar top 33 are opposing channels 38 , 39 which accommodate a ground lug that is separately attached to the busway section along the cross - piece 18 described earlier with reference to fig1 . a molded plastic cover 40 , which includes a planar top portion 40 a and downwardly depending side portions 40 b and 40 c , is attached to the base 27 by means of a pivot post 41 integrally formed therein and extending between a pair of tabs 42 , 43 , as shown in fig1 . the cover is attached to the base by positioning the pivot post 41 under a pair of curvilinear projections 32 extending from the planar top 33 . a clearance slot 44 is defined between the pivot post 41 and the planar surface 40 a of the cover to allow for the insertion of the curvilinear projections . preferably plug - in outlet box 50 includes side mounted press - fit wings 54 which allow for box 50 to be press - fit within the busway aluminum housing . press - fit wings 54 may be formed from any material , but preferably is a plastic material which allows it to single form molded together with outlet box 50 and allows for flexible mounting to the busway aluminum housing . similarly , press - fit tabs 52 can be the same or different material as outlet box 50 and / or press - fit wings 54 . tabs 52 are preferably formed perpendicular to planar top 33 of outlet box 50 having a rectangularly shaped post 55 with a securing means or locking tab 56 disposed about the end of post 55 opposite to planar top 33 , as best show in the cut - out of fig5 . press - fit wings 54 are disposed along planar bottom 28 of outlet box 50 upwards at an angle adequate to secure to aluminum housing ( 14 ), with bent 58 portion at the outer edge thereof . optionally , an insulating gasket , as show in fig4 , can be disposed on the bottom portion of outlet box 50 to interface with the busway housing for splash proof and drip - proof applications . for indoor applications no gasket is typically required . fig3 depicts wings 54 engage aluminum housing 14 to provide downward pressure . outlet tabs 52 provide lateral and longitudinal positioning and locking of outlet 50 to aluminum housing 14 . while we have shown and described several embodiments in accordance with our invention , it is to be clearly understood that the same may be susceptible to numerous changes apparent to one skilled in the art . therefore , we do not wish to be limited to the details shown and described but intend to show all changes and modifications that come within the scope of the appended claims .