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New CU and failed IR tests

I think dangerous and could present a danger if something else happens is very different. Even a car with no brakes is not dangerous parked in the drive while you go to local motorist shop for brake fluid. It only becomes dangerous when your wife nips out to do the shopping while you are away.

It is the same with electrical installations, there is no danger at all with no RCD protection, the danger is only present when some thing else happens as well, for example the immersion heater thermostat fails, and the header tank over flows, and the tun dish for the over flow is not glued, and the walls have metal inside them, and the plaster has put a nail through a cable, and in spite of sparks the lady decides to turn off the water before the electric, and the guy testing fudged the results, and the foreman who had not been on site trusted a semi-skilled guy to press a button and record results. OK at the time RCD protection was not required, and the court found the foreman guilty. But as with most fatalities it needed a whole list of things to go wrong before the lady was killed.

Had I been judging I am sure I would have not selected the foreman, to my mind plugging in a meter, pressing the button, and recording what the meter said is not a job requiring a high level of skill, I would have been happy sending an electricians mate to do the job. However what matters is what the court says. So in the case in question the real question is if a series of events happened which resulted in a death who would the court find guilty?

So installation in question, low IR between Line and Neutral how would this cause injury, it could simply be due to USB sockets being fitted, and if USB sockets are fitted should one really even measure line - neutral and even if you do likely at 250 volt not 500 volt, OK line or neutral to earth then very different, but as long as you can see why the reading should be low, be it a neon, or USB socket then the reading could be accepted. Yes one would expect RCD protection, but we have done without it for years, why should not having it be considered a danger?

However nitty gritty bit, if you are aware of a danger, now it does not matter who did the work, or who he told at the time, or any other mitigating circumstances. You know it is not right, does not matter if you refuse the work, you know it is wrong, so you should insist on disconnecting the circuits before leaving. It is the same with first electrician, does not matter if you refuse the work having tested before you start, once you know something is wrong you must act.

Same as the MOT garage phoning Police, they can't stop some one driving the car home, but they can call the Police.

I thought about this, the local authority building control are responsible for policing Part P. So you would have to write a report and present them with it. Remember heath and safety it must be in writing. So freedom of information request the home owner can find out you reported them, how long do you expect to trade for if people find out if they don't let you do the job, you will report them? Not that I think the LABC inspector will clip on his yellow light and go racing to see a Part P breach. But sucking air through the teeth unless you do, should some one get killed, and lets face it unless a death no one is interested, you as a professional who know the danger would be the one in court not the house holder as you should have known better.

So in real terms we are between a rock and a hard place. We can't win, all we can do is strive to leave a job as safe or safer than when we arrived. Saying I will not connect the underfloor heating, or new socket, or any other new circuit until all faults have been rectified is OK, but where what we have been asked to do leaves the system safer than before can we really refuse to do the work.

If some one says my socket is cracked do we refuse to change it because no RCD on the circuit, or do we advise no RCD but still change it as reducing the danger? Be it a consumer unit, a socket or a light fitting as long as not something new and safer after we leave to refuse to do the work does not protect us. That foreman did not even go to the job, all he did was trust a semi-skilled worker, we were always told if we see an oil spill and send a text to our boss saying when and what we have seen OK, but if we fail to tell anyone even if it is nothing to do with us, we can still end up in court for not reporting it, in writing.

There was a problem in one place I worked, the worker phoned the electrician, the electrician claimed he could not hear what the fault was, but did hear unit 5, so went to unit 5 foreman and asked what was wrong, he replied nothing that I know of, then some one was injured, it was a broken guard actually not an electrical problem as such, the worker who had phoned approached the HSE guy and told him how she had phoned the electricians to report the problem the day before, so then the HSE guy wanted to see the written report, on admitting she had not put it in writing she was fined for a breach of health and safety practice. Think she wished she had kept her mouth shut.
 
If some one says my socket is cracked do we refuse to change it because no RCD on the circuit, or do we advise no RCD but still change it as reducing the danger?
Maybe you or others may disagree, but I wouldn't say that replacing a broken socket (which is different from installing an additional socket) invoked any requirement for RCD protection, so there would be no need for anyone to 'refuse to change it'.

Kind Regards, John
 
Maybe you or others may disagree, but I wouldn't say that replacing a broken socket (which is different from installing an additional socket) invoked any requirement for RCD protection, so there would be no need for anyone to 'refuse to change it'.

Kind Regards, John
This is also my feeling, and although a consumer unit is more involved to a socket, even if it means just one item now RCD protected it must be an improvement, we may have to now fit steel not plastic, but I see no reason for refusing to fit a new consumer unit because some circuits supplied from it do not comply. Yes you must tell the client they don't comply, but no reason to refuse to fit it.
 
...but I see no reason for refusing to fit a new consumer unit because some circuits supplied from it do not comply. Yes you must tell the client they don't comply, but no reason to refuse to fit it.
That surely depends upon the nature of the circuits' non-compliance, wouldn't it? One would presumably not expect anyone to, say, go around digging out cables that had been buried outside of 'safe zones', but nor would I expect an electrician to connect a circuit with, say, an unacceptable Zs (or, as in this thread, a circuit with an unacceptable IR) to a new CU.

That's why I expressed the view that testing to detecting such circuit problems (Zs, IR or whatever) before replacing a CU is so important, since otherwise the electrician could find himself/herself in the position of having removed (and replaced) the old CU but feeling that they should refuse to energise it (or, at least, refusing to connect some circuits).

Kind Regards, John
 
In the very beginning of the regs, there is something that says words to the effect of existing installations installed to previous regs may not comply with current regs. This does not mean they are dangerous or need upgrading.

And I have always taken the view that (in electrical maintenance at least) as long as you leave the property no less safe than it was when you arrived, you are not doing wrong.
 
And you can't be expected to check every aspect of an existing installation when doing a board change.

You can do all the prescribed checks, but they may not necessarily show up short lengths of undersized cable, bad jointing or other hidden issues.
 
In the very beginning of the regs, there is something that says words to the effect of existing installations installed to previous regs may not comply with current regs. This does not mean they are dangerous or need upgrading.
There is indeed.
And I have always taken the view that (in electrical maintenance at least) as long as you leave the property no less safe than it was when you arrived, you are not doing wrong.
There's obviously a lot of common sense in that. However, many people seem to believe that, at least in some circumstances, if one modifies/extends an existing circuit (rather than just 'maintain' it), that whole circuit has to be made compliant with current regs.

For example, they seem to feel that if one replaces a faulty switch or light fitting in a bathroom (on a circuit which is not RCD protected), there is no need to RCD protect the circuit (as would be required by current regs), but if one, say, added some new (additional) light, that the circuit would then have to be RCD protected.

However, I don't think that 'they' are particularly consistent. In terms of sockets circuits which are not RCD protected, the general advice seems to be that one only has to RCD protect additional sockets which are added - not the entire circuit.

Kind Regards, John
 
What issues do you have in mind that have presumably been used for years but would be dangerous with a new CU?
 
What issues do you have in mind that have presumably been used for years but would be dangerous with a new CU?
I suppose it's the age-old question of what is meant by 'dangerous' and 'safe' (or 'safer').

If current regulations impose more demanding requirements than did previous regs, one has to assume that the authors perceive that the additional requirements will result in electrical installations becoming 'safer' - which implies that installations under previous regulations are now regarded as 'less safe' (than under current regs).

The $64,000 question is where/when (if ever) does 'less safe' become the same as 'dangerous' - and I suspect that no two people will agree about that!

Back in 1969, I think there is little doubt that my first car (designed and built in the 50s) was 'less safe' than one designed and built in the 21st century - but should we describe it as having been 'dangerous'?

Kind Regards, John
 
What issues do you have in mind that have presumably been used for years but would be dangerous with a new CU?
Well, first of all we have to recognise the possibility of the existence of issues which have existed for years and have been dangerous all that time. Surely it is possible for checks to throw up the existence of problems which are dangerous whether or not a new CU is installed?
 
John originally wrote:

"I would hope that any electrician finding an installation (or part of an installation) that he/she felt represented a serious danger would do everything they could to dissuade the owner of the installation not to use it (or parts of it) until it was remedied"
.

I suppose that would apply whether or not a CU was to be changed.

I just wondered what sort of problem he (and you) had in mind.
 
Back in 1969, I think there is little doubt that my first car (designed and built in the 50s) was 'less safe' than one designed and built in the 21st century - but should we describe it as having been 'dangerous'?

According to Euro NCAP, the answer is YES!

They have just given the Fiat Punto zero stars.

Now, the surprise for most is not that the Punto got zero stars in an NCAP test, but that it is still on sale as a new car!

It had a decent score when it came out, but because they are now demanding autonomous stuff and kit like TPM, that the Punto has not got, it has been demoted.
 

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