Replacing old CU with New ??

Agile said:
Whats wrong with the NICEIC apart from being expensive?
Their fee structure as mentioned above.

Their idea of qualified supervisors and monkeys, as mentioned above.

Arrogance in the way that they try to invent new regulations.

Lying to the media and the public about Part P in order to scare them into using NICEIC electricians.

Using inspectors with a clear conflict of interest who are failing people's membership applications on specious grounds in order to generate more income from repeat fees.

An extremely cynical and self-serving attitude to qualifications and experience designed to allow as many tradesmen as possible to get registered, irrespective of whether they are really good enough.
 
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Anyway - RCDs and RCCBs are one and the same thing.

An RCD operates on unbalance current between the line and neutral, operation as a circuit breaker?.

Of course, these abbreviations are confusing.

BS EN 61008: Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCBs).
 
Jaymack said:
Of course, these abbreviations are confusing.

BS EN 61008: Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCBs).
I don't understand what your point is.
 
Just making a point, why is there 2 abbreviations for the same item, is RCD a generic description?, is there any other residual current device which has an abbreviation other than RCCB?.
 
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RCBO which is an RCCB with intergral overcurrent protection.

ELCB Earth leakage circuit breaker - another term for an RCCB.
 
Spark123 said:
ELCB Earth leakage circuit breaker - another term for an RCCB.
As I understand it they are different: an RCCB works on the balance of current between L & N, while an ELCB actually measured the Earth conductor and tripped when it was energised, so a short to a "natural" Earth like a water pipe wouldn't trip it.

But I could be wrong!

Cheers,

Howard
 
I think you are right which is why ELCBs are rarely used these days.

However in a correct installation with earth bonding the "natural earth" should not exist as everything will have been bonded.

Tony Glazier
 
Until you go outside with a metal bodied applience, or install amateur radio gear with an earthed outside antenna of course, then true earth and company earth had better be similar or distress results ! (yes It can happen, hence my distrust of PME.)
 
There seems to be alot of arguments about the terminolgy and spellings of things people ask in a simple question and not getting a straight answer they are looking for in the original question. (B-A-S)

Why can there be a simple tip or answer ???? :confused:

You don't get this in any of the Motoring Forums.

Shan't be back for a while, I'd be afraid to ask for any tip.
 
Well - I don't know whether you'll read this, or even take it on board, as I fear you might be one of those people who refuses to accept responsibility for his own mistakes, lack of attention and general carelessness, but we'll give it a go.

Firstly, forget all the cross-talk between people talking about their own questions, and concentrate on the exchanges between you and me, which seem to be causing you some grief.


You said:
As I want to replace my old Consumer Unit with a New Unit with an RCD.

Would this give protection from shocks as a RCCD would, or would the indivual circuits need a RCCD?

I said:
What's an RCCD? What do you think it does?

You said:
Are you trying to be clever or what??

I said:
No - I'm trying to get you to concentrate, and think, and learn...

Do you not think you should concentrate? Do you not think you should learn the difference between the letters RCCD and RCCB? Do you not think that you should be able to spot the difference between a "D" and a "B" and wonder if "D" really can stand for "breaker"?

You said:
RCD = Residual current device

RCCD = Residual current circuit breaker


So would it be better to have one of the above as the incoming protection or have a Isolator with individual protection circuits.

Nobody is doing you any favours if they spoonfeed you, and allow you to approach electrical work with a sloppy attitude. Nobody is doing you any favours if they circumvent your carelessness by working out what you meant, and doing for your question what you should have done in the first place. And why should they? What makes you think it's OK to come here and ask questions that when taken as written are rubbish, in the expectation that we will take the time to try and work out what you really meant? If you can get those two letters mixed up, and not spot anything wrong, who's to say that you wouldn't get others mixed up, like L, N & E? Because let me assure you, if you touch the wrong thing, or wire things up wrongly, electricity isn't going to say "I know what he meant to do", and fail to obey its laws, it's going to turn round and bite, and its bite can kill.

So I don't have any regrets that I tried to get you to smarten up your act and start thinking about what you're doing.


I said:
Anyway - RCDs and RCCBs are one and the same thing.

<followed by a link to reference material>
Surely you want to learn more?


I said:
It would be utter madness to fit an RCD per circuit. If you want protection at the individual circuit level, fit RCBOs rather than an MCB and an RCD per circuit.

An isolator and RCBOs is always a better solution as it increases fault discrimination and decreases inconvenience.

It also increases costs considerably.
And surely that was the answer to the question you meant to ask?


You said:
There seems to be alot of arguments about the terminolgy and spellings of things people ask in a simple question and not getting a straight answer they are looking for in the original question. (B-A-S)
You mention motoring forums. I don't know if this analogy still works, in these days of engine management systems, or if not if you're old enough to remember it, but if I was talking about setting up the valve timing on an engine, and got BTDC and ATDC mixed up, would that matter? I mean, it's only one letter different, how important can that be? Well - you try having your exhaust valves close 20° BTDC instead of 20° after, and see how well your engine works...

I didn't argue a lot about spelling or terminology, I asked you once what you meant by RCCD, when you still didn't get it I pointed out what you'd done wrong and then I gave you the answer to the question that I thought you meant to ask, which was not about RCCBs at all, but RCBOs.

You said:
Why can there be a simple tip or answer ????

Shall I repeat it?

If you want protection at the individual circuit level, fit RCBOs....

An isolator and RCBOs is always a better solution as it increases fault discrimination and decreases inconvenience.

It also increases costs considerably.


How much simpler do you need the answers to be?

You said:
Shan't be back for a while, I'd be afraid to ask for any tip.
That may be just as well..
 
See what I mean Mr. Perfect.

It seems I've touched a live wire, is that the brown or blue wire or even is it red, yellow or blue.
 
diywhynot said:
See what I mean Mr. Perfect.

It seems I've touched a live wire, is that the brown or blue wire or even is it red, yellow or blue.

As long as there is a notice at the distribution board, warning on the use of the different colours, who cares?.
 
:LOL:

It can't be a harmonised live wire, there ain't much harmony here.....!!
 
Brown, Blue, Red and Black are all supposed to be regarded as potentially live conductors. Just that normally two of them are somewhere near earth potential.
 

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