2years ago we fitted new bathroom we used to have an 8.5 shower we changed this to a 10.5 we had a qualifeid plumber in to do the work and he also fitted the shower well over the weeked the prd operated so we had an engineer out yesterday he fixed the problem then told me that we are running it on a 6mm cable and it should be a 10mm cable he also said we had the wrong fuse as well so he turn the shower off at the mains and said it was up to us if we wanted to switch it back on again don\\\'t know what to do we spent a lot of money on that bathroom and the thought of it being knocked about i find quite daunting but surely if we have used it for 2years with no problems is it safe to carry on thanks 
