Electrical Circuit Requirement for Kitchens
A kitchen uses more electricity than any other room in the home, and the National Electrical Code stipulates that it should be amply served by multiple circuits. In a kitchen that uses electrical cooking appliances, this can mean it needs as many as seven or eight circuits. Compare this to the requirements for a bedroom or other living area, where a single general-purpose lighting circuit can serve all the light fixtures and plug-in outlets.
At one time, most kitchen appliances were plugged into ordinary general outlet circuits, but as kitchen appliances have become larger and larger over the years, it's now standard—and required by Building Code—for each of these appliances to have a dedicated appliance circuit that serves nothing else. In addition, kitchens require small appliance circuits and at least one lighting circuit.
Be aware that not all local Building Codes have the same requirements. While the NEC (National Electrical Code) serves as the basis for most local codes, individual communities can, and often do, set their own standards. Always check with your local code authorities on requirements for your community.