A load-managing electricity service (LMES) system for managing and controlling electricity-consuming loads supplied by a common distribution transformer. The LMES system includes: a communicative distribution transformer (CDT) sensor that includes a transceiver, a sensing circuit and a processor configured to determine whether a power load of the transformer exceeds an upper threshold. The LMES system also includes a load-control device (LCD) configured to communicate with the CDT sensor, and to selectively decrease or increase the power load of the distribution transformer by managing the electricity-consuming leads at consumer premises.