Cooper Bussmann Fuse Holder - HPF Series Professional range of Cooper Bussmann fuse holders from the HPF series. Thermoplastic Black Panel Mounting CATEGORIES OF PROTECTION AGAINST ELECTRIC SHOCK,PC1: No integral protection against electric shock. If required, designers must provide additional protection against electric shock on equipment.,PC2: With integral protection against electric shock. Fuse-holders shall have live parts inaccessible to IEC529 standard test finger, when fully assembled, without fuse carrier or fuse in place and when fuse carrier, with fuse is being inserted or withdrawn.,PC3: With integral protection against electric shock. Fuse-holders shall have live parts inaccessible to IEC529 1mm diameter rigid test wire when fully assembled, without fuse carrier or fuse in place and when fuse carrier, with fuse is being inserted or withdrawn.