Whilst I appreciate the attempt at clarity over 'Skilled or instructed persons' I didn't feel the need to explain the circumstances of the environment ,as the I thought it was a fairly clear cut question, I wasn't asking if I need to rcbo the circuits just how to convert the board,but to clarify. as the person in charge of the electrical safety I have taken the veiw that the circumstances in which the installation are used are so similar to a Domestic or similar ( See OSG Green page 74 ) that the use of that exception to the regs would be innappropriate and difficult to defend in a court of law, the sockets are used by all manner of people other than staff, including the general public at times, also all equipment is not ''Authorised' ( Again see the same page of OSG ).
Point 2..I have also taken the view that although I have no obligation to retro a whole install, I as the one where the buck stops have also applied 522.6.101 9 (OSG Page 74 ) as I cannot know if the wiring embedded conforms to i) ii) iii) iv).
If I am redesigning a board, it's my choice, as designer to make decisions, and remember this very important fact, BS7671 is the MINIMUM standards we must apply, not the maximum, if I decide to make something 'Safer' than the regs need, do you think this makes me a bad person ? or just a diligent, professional that doesn't want someone to get wiped out ?
ATB J