Fault on RCD Trip

[Lee321]

ads i'm actually with YOU only the current passed through the op's rcd live must flow back down the op's neutral unless there is a fault op's rcd side.

however that is a simpletons quick analysis as we know electrics do have some very strange goings on that get us! and are technical reasons

for this issue i'm trying to soak in and understand the opinions (not arguements) of the other posts as it may be possible and the explantion is in there

 

[Lee321]

:^O

 

[a1]

Ads,

You are not the only one to get a warning, New and old members will get them.

Everyone should know the score here.

Everyone has valuable input, which makes this forum the success it is.

However, I would have thought if you weren't happy with something - You would have PM'd me, But - if you want it on an open forum like you have done, then that is your choice.

Regards,

Admin.

 

[Andy™]

I totally disagree with what is being suggested here and would love to argue my point - but I've been told I'm not allowed to!

same here. but even if you back up your argument, you still dont get anywhere. i now ignore anything to dow ith steptoe & earthing

 

[steptoe]

[quote name='Andy

 

[a1]

Like I have said in the past Andy, There is nothing wrong with a Healthy Argument.

It is when it gets silly that gets on my goat. I have better things to do than to check all posts from "Adults", and deleting silly remarks and comments.

Like I also said before, Keep the silly and childish comments for other forums where they will fit in. If you want a healthy debate, then do so here.

I have also noticed a massive increase in the "Crap" word. IMO it sounds better as Carp. Especially with the growing number of Ladies we have and continue to have.

Now, I hope I make myself clear to everyone, Because I am tired of repeating it.

Best Regards,

Admin.

 

[Voltimax]

I have issues with threads that go off topic

 

[a1]

[quote name='Andy

 

[Andy™]

Like I have said in the past Andy, There is nothing wrong with a Healthy Argument.

even with drawings etc to back up any argument, it pretty much gets ignored. i could very easily make a drawing to show how a fault external to the property cannot cause an imbalance in an RCD (unless there is already a fault on the system, as ADS has already tried (& failed) to say), but there is no point. would just turn into yet another argument from certain members

 

[Manator]

[quote name='Andy

 

[a1]

[quote name='Andy

 

[a1]

How many Times, Have I, Admin 2, Forum Mods or Forum Members come on threads and said to cool it down, only to be ignored?

 

[NozSpark]

Like I said earlier.. I don't fully understand this, but I'll give it a go.

As a basic understanding.. a 3 phase star wound motor with a N connected to the star point will have no current in the N conductor.

Now lets say we have 2 houses on different phases with a shared neutral and both PME'd... now the suppliers Neutral breaks down before the houses (with a high resistance joint).

Now looking a a single house in isolation L&N currents will be balanced.. adding a second house (supplied from a different phase) with it's L&N balanced (but out of phase with the first house) will be ok.. so long as it's Neutral has a good connection to the supply..

If the Neutral now has a high resistance then the Neutral voltage will rise.. If we now draw phasor diagrams of the Neutral currents and add them together you will find that the combined N current does not equal (House 1 N A) + (House 2 N A) and this will showup on both houses..

Therefore the L current and N current will not be equal in each individual house and the RCD could easily trip.

Now we bring the PME earth into play.. as it's now got a high resistance to the network, it is now really only connected to earth through the PEB's.. this will reduce the effect of the combined N currents, but it will not remove the effect completley.

Hope that makes sense

 

[Voltimax]

I think you all need to meet up in a car park somewhere and have a good fist fight. Last man standing is the one who's right with his argument

ROTFWLROTFWLROTFWL

 

[Andy™]

Could you not do that for my benifit or others who would like to see it?I think far too many people have a notion of right and wrong, when in debate there is no right or wrong just different opinions.

sorry, but ive already decided im not getting involved in any threads like this.

 

[Andy™]

Discuss. opcorn

im staying at the back. share the popcorn!

 

[steptoe]

Im busy sorting out the garage right now,

but when I get back in I will do a very basic drawing to show how on PME a fault in another property can enter your property either through your Neutral, or via your MEBs, this is why on PME the MEBs are required to be much larger than you would think,

as a quick example take a 6mm earthing conductor on TNS and relate this to why must it be 16mm on PME....(in case the PME earth conductor is required to carry an external fault as well as your own)

in the famous words of Arnie, I'll be back......

 

[Watchdog]

I have issues with threads that go off topic

You may be on the wrong forum.

 

[Voltimax]

You may be on the wrong forum.

Notice the winking smiley?

 

[SPECIAL LOCATION]

Do you think that Mr Lawnmower Man ....

Hmmmmm....

somthing sends SL off onto an Off-Topic tangent....

that could be a good name for a film....

Mr Lawnmower Man......

Must put it in my notebook to check if anything similar has been used before......

:C

https://www.youtube.com/embed/YCxFGxqLsHE?feature=oembed

But I bet he dont Trip RCD's!!!!



ROTFWLROTFWLROTFWL