What is the difference between FA and FY I-Line breakers?
Legacy Circuit Breakers
Electrical Distribution Equipment
FY breakers are available from 15-30 amp one pole only and the 15 and 20 amp versions are SWD (switch duty) rated. These are generally used for lighting loads in I-Line 277V applications.
FY breakers have a 14k AIC rating at 240v or 277v.
FA breakers are available from 15-100A, and have an 18k AIC rating at 240v or 480Y/277v, but are not SWD (switch duty) rated