Simple - quicker breaker installation, wiring made easier Spacious - Over 4 in. of wire bending space Secure - sturdy hook-rail and reliable connection Siemens SN Series Load Center is the smart choice when value and quick installation are of highest priority. The SN Series load centers include labor saving features such as the ability to accept Plug-on neutral breakers, patented Insta-wire and mounting trim tabs. These exclusive features make the SN Series load center the best load center for the value minded contractor. Features siemens plug-on neutral, for simple quick installation, that is spacious with over 4 in. of wire bending space, and a secure reliable installation method SN Series plug-on neutral load center includes 1 factory installed ground.