I need a switched fcu for my boiler, current one I'm replacing us a 3a switched fcu coming off the kitchen ring, but I can find any 3a switched FCUs. Can I get this 13a one and put a 3a fuse in it?
Hi Cocat2517,
Yes, FCUs are rated for their maximum constant power flow levels, reducing the fuse rating will not have any direct negative effect on the FCU itself (although an overloaded lower-rated fuse may cause melting to occur inside the FCU, but this should not be the case with your described situation).
Answered by: Luceco Technical Team
Date published: 2021-10-26