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Topic Title: FAULTY RESIDUAL CURRENT CIRCUIT BREAKERS.
Topic Summary: AND ASSOCIATED DANGERS.
Created On: 20 March 2017 10:39 AM
Status: Read Only
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 20 March 2017 10:39 AM
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Zoomup

Posts: 3169
Joined: 20 February 2014

Mornin All,
Recently I came across two split load consumer units in one house, one mounted above the other. (Circa late 80s early 90s). A total of four M.K. R.C.C.B.s is present and when I tested the units by the test buttons three out of the four did not trip off. After manually turning off the switches and resetting, two of the three then switched off by the test button use, two did not. A fifty percent failure rate. If this had been a TT earthed system then I would have been very worried, fortunately it is not.

I have become aware of self testing R.C.C.B.s. But they are large and must be expensive.

So, what is the way to ensure that the general public gets R.C.C.B.s tested in a regular basis> Is there a way?

Bye,

Z.
 20 March 2017 11:03 AM
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AJJewsbury

Posts: 15632
Joined: 13 August 2003

In the old days they would have had a "Public Information Film" - but unless someone can point to the kind of statistics/incidents that would justify the cost, I suspect it's going to be a long way down anyone's list of priorities. The fire service are always on about cases where a family died in their sleep in a fire because the smoke alarm didn't work (or had been deliberately disabled or had never been fitted) - but off the top of my head at least I can't think of a single incident where someone died due to an RCD being faulty.
- Andy.
 20 March 2017 02:46 PM
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psychicwarrior

Posts: 531
Joined: 18 October 2010

Is it a case that the basic safety instruction (if given and labelled) to manually test quarterly (or some other interval better than nothing) is not being adhered to. :-~

What character would take the lead in such a public info. film.
 20 March 2017 03:03 PM
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sparkingchip

Posts: 9836
Joined: 18 January 2003

Originally posted by: AJJewsbury

In the old days they would have had a "Public Information Film" - but unless someone can point to the kind of statistics/incidents that would justify the cost, I suspect it's going to be a long way down anyone's list of priorities. The fire service are always on about cases where a family died in their sleep in a fire because the smoke alarm didn't work (or had been deliberately disabled or had never been fitted) - but off the top of my head at least I can't think of a single incident where someone died due to an RCD being faulty.

- Andy.


If the 35 year old voltage operated switch had been replaced with a working RCD the outcome may have been different, so the lack of a working RCD was a contributing factor.

Andy B.
 20 March 2017 03:12 PM
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sparkingchip

Posts: 9836
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 20 March 2017 05:27 PM
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AJJewsbury

Posts: 15632
Joined: 13 August 2003


but it's still the 'buy one and you'll be safe message' not 'you need to take responsibility to repeatedly test it yourself' message.
- Andy.
 20 March 2017 05:56 PM
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mikejumper

Posts: 2391
Joined: 14 December 2006

Originally posted by: Zoomup
So, what is the way to ensure that the general public gets R.C.C.B.s tested in a regular basis> Is there a way?
Z.

Yes. Texts, social media etc.. but it's still going to be a hard sell.

If it was just a question of pressing the test button and then resetting the RCD more people might do it, but quite often all or most of the MCB's need to be switched off first before it will reset. Then there's all the electronic stuff that needs resetting.

I guess also that if everything is working ok there is a reluctance to interfere with it.
 20 March 2017 06:10 PM
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sparkingchip

Posts: 9836
Joined: 18 January 2003

As an electrician I am wary of pressing the test button on an RCD just to check it without ensuring that if it is faulty and will not reset I will get paid to replace it, as I am with fused main switches. Earlier this year I had a conversation with a buy to let landlord who did not want to pay my labour for replacing both a fused main switch and RCD that would not reset I had turned them off to check which supply went to which flat, as it happens she has a account at a wholesalers and I had already replenished my van stock using her account, so we agreed to differ, she paid the materials and I lost out on two hours replacing the faulty parts and going to her wholesalers to get replacements.

I have also had a RCBO blow up when I pressed the button, so tend to use the end of a screwdriver or the like if I think it hasn't been tested frequently.

Andy B
 20 March 2017 06:18 PM
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sparkingchip

Posts: 9836
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A collection of ESC videos

Still no mention of regular RCD testing by the home owner or tenants using the test button.

Andy B
 20 March 2017 07:45 PM
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daveparry1

Posts: 7704
Joined: 04 July 2007

Are you sure it wasn't N-E fault/s?
 20 March 2017 07:50 PM
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sparkingchip

Posts: 9836
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Damp and rust!
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