It's the concept which amazes me. Despite what you say, 'what we have' is clearly inherently unsafe, as illustrated by the fact that PPE is theoretically required in order to make it safe to energise/isolate an installation or even to replace a blown fuse ... yet the switch was invented at least 200 years ago. It is surely far more logical to remove a hazard than to devise and utilise methods in an attempt to minimise the effects of that hazard?What we have is safe, if operated by properly trained & authorised people. We only use the cut-out fuse to energise up to the customer's isolator(s). Whatever folk say they have seen, we have strictly enforced requirements to wear PPE, failure to do so is at the risk of disciplinary action.
Is there any situation outside the world of the DNOs in which this approach would be considered acceptable? Would you regard it as acceptable, say, for a piece of industrial machinery to be installed such that the only way it could be isolated from its electricity supply (or its protective fuses replaced) would be to pull live fuses, provided it was only 'allowed' that such operations could be undertaken by suitably trained and 'authorised' personnel wearing appropriate PPE?
That surely is a very weak argument which, if generally applied, would mean that you would still be installing cutouts designed in the early 20th century? If the individuals concerned were that easily confused by being faced with cutouts of differing designs, then either their training or suitability for the job would surely be in question? I would have thought that it would take no genius to recognise the difference between cutouts with and without switches.Unless a major project is brought into being there would only be a very slow accumulation of some other design which would make it worse as there would be confusion.
I'm pretty certain that I would have expressed similar 'amazement' at least 30 years ago, so the question really relates to how many of those 2m customers have had replacement or new cutouts installed in the last 30+ years.Going back to the 2,000,000 customers at the rate of 3/team/day to change them - work it out for yourselves
Kind Regards, John.
