Reliance Controls Q310C  10-Ciruit Q-Series Switch, 125/250-Volt
Easy to install and operate, connects portable generator to residential load center. Allows manual transfer of individual loads to prevent overloading generator. Each individual circuit can be transferred separately and only as needed. Now required by Article 702.6 of the 2002 National Electric Code to prevent inadvertent backfeeding of electric power from generator into utility system which can be a safety hazard.