The F-Frame Series C circuit breakers (Fig. 1) are rated from 15A to 225A (150A for 1 pole versions) continuous current and are available as thermal-magnetic circuit breakers and molded case switches. (Molded case switches are available rated at 100A, 150A , and 225A.) Circuit breakers are listed in accordance with Underwriters Laboratories, Inc. Standard UL489, and satisfy the (P1) requirements of the International Electrotechnical Commission Recommendation No. IEC 157-1. Molded case switches are listed in accordance with UL489. For this publication, the term circuit breaker also includes molded case switches and F-Frame is used to cover all of the circuit breakers Agency advantages supply the following brands: ①Allen-Bradley( Rockwell Automation)Series ②Square D（Schneider Electric） Series ③Eaton - Cutler Hammer (Westinghouse )Series ④SIEMENS PLC Series，Siemens CNC system ⑤Eaton moller Series