I had building control around to sign off the first fix electrics in my kitchen. I've extended the ring circuit and will need to connect it in to the existing supply. I was going to use 30A junction boxes which will be located in the ceiling/ floor void but aparently, according to the men who know, junction boxes are not considered to be "permanent joints" and shouldn't be used in places that are inaccessible (even though I said I could get to them from the floor above). They said I needed to use a crimped connection in a junction box. Fair enough but what exactly are they? Will I need a special crimping tool as well now? I can't find anything out about them online- any clues?
Thanks.
Thanks.