turning now to a detailed description of the first embodiment of the invention illustrated in the drawings , and referring first to the prior art raceway configuration of fig1 and 2 , a surface raceway base 10 is preferably formed of metal , as for example , steel or aluminum , but could be of polymeric plastic material also . the raceway has a generally channel shape , as best shown in fig1 such that opposed sidewalls 12 and 14 are provided integrally with a bottom wall 16 . the bottom wall is adapted to be secured to a structure , such as a wall , for example , in order to provide separate raceway channels capable of accommodating power lines , communication lines , fiber optic cabling , or the like . although not shown , conventional dividers can be provided within the channel shape for separating the various types of wiring contained therein . the raceway base 10 is adapted to receive a cover 30 that spans these base sidewalls , but it is within the scope of this invention to provide a divider in the base that will accommodate a plurality of covers so that access to each of several separated channels can be had without disturbing an adjacent channel . the raceway base 10 defines a single channel of appropriate size between a practical minimum cross - section up to a practical maximum . in the larger sizes , more than one channel would generally be provided by supporting conventional dividers ( not shown ) supported within the channel in accordance with prior art teachings . inwardly turned marginal edge portions 18 and 20 of the sidewalls 10 and 12 define lips 22 and 24 that provide a convenient anchoring point for support clips ( not shown ) that , in - turn , support the dividers . turning next to the cover 30 , it too is preferably of bent metal or plastic configuration having a flat central portion 32 that is adapted to cover the opening defined by the base 10 , and the cover 30 further includes marginal edges 34 and 36 that are adapted to overlay or overlie , respectively , the marginal edges 18 and 20 of the base sidewalls 10 and 12 . the integrally formed cover 30 further includes depending flanges 37 and 39 , which flanges are adapted to be releasably received between the inwardly turned marginal edges 18 and 20 of the base 10 . such a construction affords the installer with ease of assembly in that no tools are required for assembling the cover 30 with the base 10 . however , as a result of designing these components to have such ease of assembly , it will be apparent that these components can also be readily disassembled . such a situation can be undesirable in an environment where tampering with the wiring in some installations is a definite disadvantage . consequently , and in accordance with the present invention , means is provided for preventing the ready disassembly of these components without interfering with the ease with which such components must be assembled in the field . as best shown in fig3 such means for securing said cover to said base preferably takes the form of a bracket 40 that may be similar to or even identical to that commonly utilized in such raceways for supporting electrical devices , such as outlet plugs , or telephone jacks , or the like . still with reference to fig3 the bracket 40 spans the opening defined by the base 10 , and is adapted to be provided between the dependent flanges of the raceway cover 30 . in accordance with the present invention , the raceway cover flanges are cut away or relieved to accommodate the bracket 40 . unlike the conventional use of such brackets 40 where the cover flanges are cut away for locating an outlet plug or the like , the present invention requires that these flanges be precisely notched as shown in fig5 and 6 . in accordance with the present invention , the bracket 40 is provided in underlying relationship to one end portion of the raceway cover , as suggested in fig7 for the bracket 40 . the bracket 40a is of different configuration than that illustrated at 40 in fig3 and 4 , but the end portions of the bracket 40 and the end portions of bracket 40 are of identical geometry in that they permit ready - assembly of the bracket with the base by spreading the base sidewalls slightly with a tool , such as a screwdriver , in accordance with techniques currently known to the installer in connection with installing outlet devices , for example . with particular reference to fig4 the bracket 40 has opposed ends 42 and 44 that are adapted to engage the in - turned marginal edges and the lips of the raceway base . more particularly , bifurcations 42 a and 42 b of the end 42 of the bracket 40 serve the dual function of engaging the marginal edges 18 and 20 in the base , and also serve to engage relieved regions , or notches provided for this purpose in the raceway cover flanges . these relieved regions or notches of the raceway cover flanges are best shown in fig5 and 6 at 38 . note the stepped notch configuration and the inner narrow notch for receiving the bifurcation 42a . the downturned l - shaped shelf 42c of the bracket 40 need only have a clearance notch in the cover flange because it is intended to engage the lip of the base . the narrow inner notch , however , is engaged by the bracket bifurcation 42a in order to prevent pulling the cover 30 from the base 10 as mentioned previously . the l - shaped shelf portions or offset portions 42 c and 44 c that anchor each end portion of the bracket 40 in the base 10 prevent its removal except as a result of spreading the sidewalls 12 and 14 of the base 10 . such spreading of the sidewalls is effectively precluded in the present design as a result of the configuration for the aforedescribed notches 38 in the flanges of the cover 30 . although fig6 does not show the base , the relationship between the bifurcation 42 a and the configuration of notch 38 is such that removal of the cover is effectively prevented , unless it can be slid longitudinally relative to the base away from the bracket 40 . only as a result of separating the cover 30 from the bracket 40 , can one achieve the necessary spreading of the sidewalls of the base so as to permit removal of the cover or the bracket from the base . it should be noted that the installer of a raceway system that has been provided in accordance with the present disclosure must , of necessity , have sufficient freedom of movement for the cover relative the base so as to permit assembly of the components in the manner described . fig8 shows an access plate that can be used to secure two raceway covers in place at any point where the installer will need to provide a final assembly without having such freedom of movement of a cover relative a base . the installer , either at the end of a run , or on a raceway between two walls will come to a point where it will not be possible to provide the last raceway cover in position as a result of utilizing a bracket of the type described above . at such a point , it is necessary to utilize a tamper resistant access plate 50 , to complete and maintain the tamper resistant nature of the raceway system . this tamper resistant plate need not slide in the raceway , and has flanges 50a completely notched away at both ends , to allow the plate 50 to be placed directly down over the brackets that jut out from the adjoining covers . the flanges of the plate are also notched away in the middle 50b , and the plate comes with two countersunk holes to allow special &# 34 ; tamper resistant &# 34 ; fasteners to be screwed through the cover into a bracket of the type described above . in summary , a conventional raceway cover is provided with specially shaped notches in the ends of the cover flanges . a conventional device bracket or equivalent is snapped into the raceway channel adjacent to the end of the cover , following which the bracket is slid so that its end portions move into the notches under the cover . the bracket protrudes from under the cover a distance approximately equal to half its width , as suggested in fig7 . thus , the bracket is held to the base in much the same way as a conventional device bracket is held in - place , but due to the nature of and configuration for the notches in the cover flanges , the bracket holds the cover onto the raceway channel . the next cover can be snapped onto the raceway channel and slid into place alongside the cover shown in fig7 . as a result , a conventional appearance is provided for the raceway system , but access to or tampering with the raceway cover is effectively prevented except for the necessary access afforded at locations where it will be necessary to remove covers , as for example , the end of a run adjacent to the corner of a room . a small 6 - inch plate can be utilized in this region , and special purpose screws provided so as to discourage tampering with the raceway system even at such locations . while a preferred embodiment of the invention has been shown and described , various modifications and substitutions may be made without departing from the spirit and scope of the invention . accordingly , it is to be understood that the present invention has been described by way of example , and not by limitation .