I have tried to explain the reasons why the IEE are making the PIR proposal. I have not said I agree completely with the proposed PIR.
Contrary to the persona I may have projected, I too do have flesh and blood and a limited disposable income, and like most on the forum I do not relish the financial implications of having to have a PIR performed.
I also agree that there has been no substantiated evidence of reoccurring failures of electrical systems in caravans on a scale that warrants the imposition of such an expensive and invasive procedure. In fact it is highly likely that the inspection process is likely to do more damage to systems than the normal wear and tear. I do think the suggested PIR is over the top, and a much simpler and quicker process could be devised to give a high level of confidence in the safety of the system.
A caravan system is not anywhere as complex or extensive as domestic house, The manufacture could easily supply a wiring list with conductor sizes and ratings, and relatively simple tests can confirm the correct polarity of wiring, the effectiveness of the continuous protective conductor, the action of switches and isolators.
What we cant do is ignore the implications of the electricity supply Act, but I think more reasonable and realistic processes need to devised to satisfy the requirement.