A property I'm doing some work on has a B6 MCB which supplies two cables: to a stair lift (since removed after sale of property), and to the smoke alarms. The cable for the alarms is further protected by a 3A FCU next to the CU. I can't think of any purpose this fuse serves and am thinking of removing it and connecting the smoke alarm cable directly to a lighting B6 instead. Any reason why I shouldn't do this?
