beneath the outwardly extending flange 18 associated with the conventional fuse 11 as is specifically shown in fig1 and 2 the clamp 30 is preferably constructed of an electrically insulated or non conducting plastic material and in some embodiments the legs 31 and 32 may be integrally formed with respect to the head 33 in such a manner that they may be slightly yieldable with respect to one another with the legs tapering slightly inwardly away from the head 33 toward the flange elements 35 and 36 in this manner when the clamp is applied to the upper portion of the fuse 11 the legs may be yieldably separated with respect to one another in order to allow the legs to be engaged adjacent the front and rear surfaces 16 and 17 respectively of the fuse thereafter the legs will tend to be brought into compressive relationship with respect to one another to thereby assure a secure seating of the clamp with respect to the fuse housing as is shown in fig2 the threaded opening 34 should be aligned along a common vertical axis with one of the openings 19 or 20 through the upper surface of the fuse in order to establish an electrical contact with either of the tab portions 13 39 and 14 39 of the terminal elements 13 and 14 of the fuse a tap 40 is provided which is threadedly adjustable through the opening 34 the tap is constructed.