Camdenboss mains fused terminal blocks camdenboss cmftb3 the camdenboss mains fused terminal block 3 pole is an economical 3 pole terminal strip with 5 x 20mm and 63 x 25mm fuse holder to iec257 available as a 3 pole or as a 2 pole in a 3 pole housing camdenboss cmftb3 mains fused terminal block 3pole