Thanks Queenslander
Even though some of these people don't have the right certification to have the system connected it makes my blood boil to think that you still have to put things right before you can pass the job. As with the TT system surely it is just a case of the earth bonding. To be honest with you I have gotten too comfortable doing my Heating systems and probably would not be able to pass the exams with any confidence. I have forgotten the last time I had to do any calculations. 32 years doing heating systems and it seems I am rare in the trade too and in demand. I have to say I am very good at what I do though and have seen some horrific work even from NIC registered contractors. Sole traders and others. Wish my health were better cause I could be earning a lot more than I do now.