P
Paul_C
What the absolute level of safety is after you have done is of absolutely no relevance.
If you asked the "Man on the Clapham Omnibus" what he takes "reasonably safe" to mean, I'm sure he would disagree with you:
reasonable a. 1. Having sound judgement, sensible, moderate, not expecting too much, ready to listen to reason. 2. In accordance with reason, not absurd; within the limits of reason, not greatly less or more than might be expected; inexpensive, not extortionate; tolerable, fair. 3. (arch.) Endowed with faculty of reason.
Some of the stuff you've written above is laughable. 40mph vs 50mph? There are very real differences in those. Installing cable of one colour vs another when there is NO difference in the quality, NO difference in the cost, NO difference in the time taken, NO difference in the ease of use, NO difference in the availability is not a valid comparison.
Why not? Your line is that it is unreasonable to choose the less safe of two available options. Driving at 50 mph instead of 40 mph is clearly the less safe option, so why do you not consider that unreasonable as well?
Again you ignore the factor of reasonableness which I postulated Again you show that you think that if you pretend that the word "reasonable" cannot appear in regulations that somehow the ones which do will vanish.
I am not pretending it does not appear. I'm arguing with your interpretation of what it means.
Part P is what we are discussing
The term "reasonable" appears throughout the building regulations. So the other parts are just as relevant - Unless you're trying to argue that it somehow takes on a different meaning in Part P.