Abstract: A remote receiver for decoding and responding to control pulses imposed on the power lines of a power transmission system. A large number of receivers can be connected to the power lines in, for example, a centralized load management system and can switch associated loads as commanded by coded messages generated at a central station and injected onto the power lines for distribution. The receiver responds to a code which must have properly timed start, preselect and operate pulses in that order. Provision of the preselect code feature greatly increases the possible number of code groups in the system.