Mersen midget fuse blocks accommodate all 30 A 1-1/2 x 13/32 in midget fuses. Class CC fuse blocks accommodate all 30 A Class CC fuses. A choice of box, screw, or pressure plate connectors fit a wide range of stranded or solid copper wire. Insulators are glass filled polycarbonate (GFPC) with verified dielectric strength in excess of 2500 V. Fuse blocks feature a unique adder block which can be snapped onto 1, 2 or 3-pole blocks to form multi-pole segmented blocks of as many poles as desired. All fuse clips are made of high conductivity tin plated copper alloy.