Siemens GNF221A 30 Amp Indoor, Non-Fusible, General Duty Safety Switch 2 PoleSiemens GNF221A GNF221A Product Description General Duty Safety Switches are intended for applications where reliable performance and continuity of service are needed. But where duty requirements are not severe and usual service conditions prevail. These switches are intended for use primarily with supply circuits rated 240 Volt AC or less where the available fault current is less than 100,000 Amp when used with Class R or T fuses or 10,000 Amp max