Discuss DONT RELY ON RCD's PLEEEEESE. in the UK Electrical Forum area at ElectriciansForums.net

'Additional protection', better with than without ;)

And a surprising amount of faulty RCDs seem to be down to a lack of routine testing. I've read a few cases of RCDs failing on RCD testing then functionally perfectly well after it has been manually tripped and reset
 
no....
due to your own incompetance...

so just who told you to handle any 2 phases simultaneously?

come on...this is pis poor practice...

Glad to see your putting the practise in for you your new role as a moderator it is coming on a treat Glenn:computer:
 
'Additional protection', better with than without ;)

And a surprising amount of faulty RCDs seem to be down to a lack of routine testing. I've read a few cases of RCDs failing on RCD testing then functionally perfectly well after it has been manually tripped and reset

If the RCD fails on manual test, it fails test.
It must not be put back into service, how can you tell that it will not fail again, it has failed once, once is enough to kill someone.
 
Out of interest....all you guys that carry out EICR ......how many RCD's do you fail as they do not operate within time limits or not at all. I was told recently that 7% RCD's fail! Not good if you are receiving a shock.
 
If the RCD fails on manual test, it fails test.
It must not be put back into service, how can you tell that it will not fail again, it has failed once, once is enough to kill someone.
it states quite clearly that if the manual test (test button) fails first time round...then its a fail....
regardless of the 1/2, 1 & 5 values...
 
Last edited:
Hahahahaahaaa...FULL story, please!!! :smilielol5:
On here will be absolutely fine. :21:
OK..
what happened was i was stood on a wheely bin to change an outside light..all because the dummy i was working for had left the ladders on another job...
first time it was OK...
then i had to go get something...
got back on the wheely bin and was just running the screws in when it went from under me..
now we all know that wheely bins are not that high but it was the way i fell...
shattered my ankle (both sides)..
i have metal plates on each side and some of the screws fixing it ar 50mm long...
theres something like 12 screws in each side...
all back to normal now but i was off for 8 weeks....
i`m lucky to be walking at all really...and when its damp weather it sometimes plays up...
 
One thing that was impressed upon me during my training is that although there is an accepted resistance for the human body, this can vary dramatically from person to person, obviously changing shock risks at different levels. An older person with a weaker heart for example can be more susceptible to fibrilation at lower amperage levels.
Hence the effectiveness of a 30mA RCD depends on the situation.

GN7 table 1.1 gives the "Total body impedances (Zt) for a current path hand-to-hand" for a human.

@ 225V (from the book) 5% of the population has a Zt of 775 Ohms

50% has 1225 Ohms

95% has 1900 Ohms

Think of these figures when you next get a belt protected by an RCD. I've had a shock earlier this year from another sparks cock up and I must be in the 1900 Ohms range of body Zt, it was a hand to hand shock and I did'nt die BUT the circuit was protected by and RCD and it did'nt trip??? Full test on the RCD and it was fine????


Older people, people with medical conditions etc may still receive a fatal shock. RCD's are not the miracle cure for everyone. Lets get that straight from the start. Yes they are good but they are not to be sold as "a shock free device".
 
OK..
what happened was i was stood on a wheely bin to change an outside light..all because the dummy i was working for had left the ladders on another job...
first time it was OK...
then i had to go get something...
got back on the wheely bin and was just running the screws in when it went from under me..
now we all know that wheely bins are not that high but it was the way i fell...
shattered my ankle (both sides)..
i have metal plates on each side and some of the screws fixing it ar 50mm long...
theres something like 12 screws in each side...
all back to normal now but i was off for 8 weeks....
i`m lucky to be walking at all really...and when its damp weather it sometimes plays up...


Glenn, I took the Mick at the time. I wont rib you on here for making a daft decision when you was in a rush. BUT I still find it funny and I will take the Mick at any opportunity you bloody idiot lol, pmsl.
 

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