Hi all, I know this has been discuss a lot, but I have a slightly different issue. I have a 10mm cable, so that is fine ( I am not entirely sure of the length to the consumer unit). We have just replaced our 8.5kw shower with a 10.5kw shower. The Triton manual says to use a 45MCB - However, we have a Crabtree Consumer unit and they do not have a 45MCB! Apparently it is something that has been discussed before... So... I have read that 40MCB would most likely be fine, as unless you sat under the shower for 45mins, its unlikely to overload. So I'm thinking to go with the 40MCB. They do a 50MCB, and a few are recommending that, but surely its safer to err on the side of caution with the 40MCB - worse case scenario, it trips a lot.... Thoughts? Many thanks.