Can a breaker with lugs on both ends be converted to one for bus connection, ex. FAL to FAP functionality?
Can a legacy breaker with lugs on both ends be converted to become a bus-mounted breaker in the field?
Legacy F, K, L, M frame circuit breakers
Yes, they can, but there are conditions for most of them.
When converted to XXP bus-mount, circuit breakers with the following prefixes must have screws with nuts through the ON mounting-screw holes:
FHP FCP SFAP SFHP SFCP LAP LHP Q4P SLAP SLHP MAP MHP SMAP SMHP (MEP MXP).
Circuit breakers with these prefixes DO NOT need screws through the ON end mounting holes:
FAP KAP KHP SKAP
In addition, the KAL and KHL breakers need to have bus mounting kit AL250KAIN installed in order to have threads to mount the bus to the breaker.
Powerpact breakers with lugs do not need these extra screws when converted to bus connection, but they do need terminal nut kits to replace the lugs. See current Digest for terminal nuts and bus bar connection hardware.