I will be putting down a tiled floor in our bathroom but under the existing boards I have a JB on the kitchen ring with a spur going down to the extractor fan plastered in to the wall. I know that as the JB will become inaccessible it can't stay there but what is the best way round this? Can all three cables be ratchet crimped?I've done a search but only come up with a thread saying that you can only have one wire in one wire out of a butt crimp. Is this correct?If anyone knows different or has a better solution I'm all ears. Thanks