a load control system and method of time multiplexing power to a plurality of holding shelves in a food holding cabinet to allow total cabinet power to be limited to electrical distribution capabilities . this method allows for individual shelf heaters to be utilized normally to maintain food temperatures during normal use and modulates power when multiple shelves demand heating that would normally exceed branch circuit capabilities thus tripping the breaker . the system monitors temperature of each shelf and based upon demand executes a logical demand schedule for each shelf heater output such that total system demand does not exceed available power to the system .