Selection of distribution transformers has historically varied by utility according to their particular concerns and needs. These purchases have also been influenced by standards set by the DOE, in aim of preventing utilities from making purchases purely based on economic evaluation and without regard to losses. This advisory reviews the current state of transformer standards, and NRECA’s work on behalf of America’s Electric Cooperatives to represent our industry’s needs and concerns within stakeholder forums and promote better approaches for addressing future transformer efficiency standards.