Do you really think nonsense like umpteen repetitions of "No" benefits anything?
And when you are looking at a socket wired without that little piece of green/yellow sleeving on the earth and trying to assess whether you think it's reasonably safe or not, how exactly are you going to know that?
It's just another way of writing "no, no, and a thousand times no".
I'll make you an offer:
I suppose it might be possible that an unsleeved CPC might be almost touching a live terminal, and a current path might be completed by condensation or dust, or even movement of the CPC.
Very little is impossible! Indeed, live and earth terminals are sometimes close, so that your 'condensation or dust' might create a current path quite apart from the CPC.
It might, if a person were to be in contact with the CPC or a metal accessory front plate when that path occurred.
That wouldn't be any different from a similar fault occurring on a metal-cased appliance which is plugged into the socket and with which somebody could be in contact.
What do you envisage as the 'second point of contact' which would be at a 'dangerously' different potential from the installation's CPCs? Main bonding should make that impossible (unless you are going to invoke some of bernard's damp walls or floors!), shouldn't it. If everything is done properly it should not matter whether the potential of the 'equipotential zone' is 0V, 50V or 230V above true earth, provided the potential 'victim' is entirely within the equipotential zone ... and proper circuit design and protective devices ought to ensure that 'unsafe touch voltages' between different CPCs in the same installation cannot persist for a significant period of time.
True, but a proportion of the population will be susceptible to harm within that period until the protective devices have operated. It's a small risk, but also a small cost to mitigate it by sleeving the CPC.
It's difficult to make any probabilistic statements without being accused of being irresponsible, callous, or worse. However, the probability of (a) such an L-CPC short happening (as a result of no sleeving) AND (b) someone managing to touch two things which were, as a consequence, at dangerously different potentials AND (c) that someone being unusually susceptible to electric shock AND (d) that touching to happen within the few tens of milliseconds it would take for the device to operate would surely be as close as makes no difference to the oft-mentioned 'vaninshingly small'!
Oh dear, it must be Friday eveningCan you connect RCDs in series?
I was rather expecting that!
) and install it probably takes, say, 15 seconds - aka about 8p of 'labour time' at £20/h. If one makes a wild guess at 20 million domestic electrical installations in the UK, each with around 80 bits of sleeved CPC, my arithmetic says that amounts to around £128 million in 'labour costs'. Do you have any thoughts on the probability that such an 'investment' will save just one life in a particular period of time?If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
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