A modular system for mounting a comprehensive range of fuse and relay modules. Frames of 1, 2, 4 and 5 modules carry 7 different configurations of mini blade fuse, maxi fuse, micro relay, standard relay and high current relay modules. The 6 way maxi fuse module has an M8 stud for the main power feed input. This cable can enter through either side of the housing providing the module is placed at the end. By using a right angle tube terminal, the power can enter from beneath with all the other cables. Terminals are crimped and inserted from beneath. A secondary terminal lock is then pushed into place to further hold the terminals. A cover can be fitted over the completed frame. All modules and terminals must be ordered separately.