Patent ID: 7872429

Claim:
A multiple location load control system for controlling an amount of power delivered to an electrical load from an AC power source, the system comprising: a main load control device adapted to be coupled in series electrical connection between the AC power source and the electrical load for control of the amount of power delivered to the electrical load, the main load control device operable to conduct a load current from the AC power source to the electrical load; and a remote load control device adapted to be coupled in series electrical connection with the main load control device between the AC power source and the electrical load, such that the remote load control device is operable to conduct the load current from the AC power source to the electrical load, the remote load control device adapted to be further coupled to the main load control device through an accessory wiring, the remote load control device comprising a power supply; wherein the main load control device is operable to enable a charging path to allow the power supply of the remote load control device to charge through the accessory wiring during a first time period of a half-cycle of the AC power source, the main load control device and the remote load control device operable to communicate with each other via the accessory wiring during a second time period of the half-cycle.