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?
The 3amp FCU is common practice in the fire & security industry maybe it's come from that. The 6amp mcb offers little protection to the smoke alarm, downsizing through a FCU protected at 3amps is better imo.
The 3amp FCU is common practice in the fire & security industry maybe it's come from that. The 6amp mcb offers little protection to the smoke alarm, downsizing through a FCU protected at 3amps is better imo.
