A bit of advice required. Currently have an old redring shower fitted and want to change to an 8.5kw shower. There are two consumer units a modern one and an old one (4 Fuses)with fuses that are pulled out like a plug which the shower is currently connected to. The shower has a 32 amp fuse which is not adequate for a 8.5kw shower. Would it be possible to remove this fuse and replace with a 40 amp fuse to allow the new shower. The cable is 6mm but this should allow for an 8.5kw shower. So my main concern is the fuse. Glad of any advice or links with information on this subject