forward end 36 of door 14 is positioned when door 14 is closed each of the brackets also includes a series of holes dimensioned to receive screws the screws facilitate securement of the housing about an access port in door 35 access door 14 is slidably positioned along the guide track formed between top and bottom brackets 30 and 34 door 14 includes a handle 40 to facilitate opening and closing of the door preferably the top and bottom edges 37 and 38 of door 14 are radiused to permit door 14 to slide freely along the guide track door 14 is movable from a closed to an open position to permit access into housing 12 from within the confined space a stop 41 fig2 is fastened to one side of access door 14 stop 41 is positioned to engage side wall 22 when access door 14 is in the open position to prevent door 14 from sliding out of the guide track preferably sliding door 14 is constructed from stainless steel however other materials having the requisite strength requirements may also be used a pair of locks 42 and 44 are secured adjacent to access door 14 preferably locks 42 and 44 are secured to top bracket 30 via screws alternately locks 42 and 44 can be secured to door 35 and or other fastening techniques may be used to secure the locks in place referring to fig4 each lock includes a spring biased projection 54 and 55 which is urged downwardly.