Overview Honeywell AT87 powers 24V air conditioning circuits and other applications that do not exceed the listed ratings. Features Meets NEC Class 2 not wet, Class 3 wet and UL 1585 requirements. Transformer marked NEMA Type E. Overload protection provided. Color-coded leadwires for primary connections. Product SpecificationsDimensions (in.)2 15/16 in. deep x 2 7/32 wideDimensions (mm)74.6 mm deep x 65.4 mm wideTemperature Range (F)-20 F to +105 FTemperature Range (C)-29 C to +41 CIncludesEnergy limiting overload protectionMountingFoot-mountedElectrical RatingsPrimary voltage--120 Vac; Secondary voltage--26.5 V.O.C.Frequency50 Hz; 60 HzApprovals, Underwriters Laboratories Inc.UL Component Recognized.Approvals, Canadian Standards AssociationCertifiedNEMA RatingNEMA type EElectrical Connections (Primary)(in.)12 in. leadwiresElectrical Connections (Primary)(mm)305 mm leadwiresElectrical Connections (Secondary)(in.)12 in. leadwiresElectrical Connections (Secondary)(mm)305 mm leadwiresElectrical Ratings, Output24 Vac at 48 VA