Federal Specification a-a-50552, Nema/ansi Fb-1, Military Specification Number W-F-406d, W-F-406e, W-F-408d, W-S-610d | Energy Star Approved, Ul Listed, Culus Listed E467698 | Ul 514b, Ul File Number E148720, Us Federal Specification Number a-a-50553, Csa Certified, Nema/ansi Fb-1, Military Specification:w-F-406d, W-F-406e, W-F-408d, W-S-610d