Rcd mcb

[1664]

I was merely stating fact and despite re-reading it several times I fail to see anything 'obnoxious' in my post

Perhaps like a 10mA RCD you're over sensitive?

Note, that is a joke

[billybigspud]

Not in the correct application it's not.

[1664]

Yes, laboratories, medical apps - which is why I'm puzzled as to why (if) that's what's fitted to westys.......

[Technobadger]

Yes it's a 10ma I assume because 30 ma requires 200 ohms or less external loop to disconnect
It is two pole but uses 3ways ie same size as a 3ph mcb
The size is not wrote on but I guess 16a is fine as there is only 1.5mm flexes being used
There is a test button in the middle way
Maker shniker abb
I've not come across any 3way 2pole 61008s 30 or 10 ma
I would recommend a 10 ma as continental earthing arrangements are not in line with bs7671

But someone must sell a replacment

[1664]

Hate to disagree, but a 30mA requires an earth loop of 1666 ohm or less to disconnect which is fine (even on the continent) and european standards have now been 'harmonised', hence our stupid cable colours and ridiculous 'new' Zs values for circuit breakers due to a theoretical lower voltage of 230v.
They just don't like values of earthing arrangements of above 200 ohm as they consider them "unstable" even with a 10mA RCD, although both RCD's would still operate well above that.

10mA is unecessarily low but then we're dealing with the Germans here....

Can you pop a couple of pictures up? I'd like a look at it.....

I have seen single pole RCD's that took up two spaces in (old MEM) boards before, the second space housing the 'Test' button, so three spaces for double pole would possibly follow that pattern in order to switch the neutral too.

Are you absolutely sure the RCD itself is faulty and not some wiring?

[billybigspud]

Hate to disagree, but a 30mA requires an earth loop of 1666 ohm or less to disconnect which is fine (even on the continent) and european standards have now been 'harmonised', hence our stupid cable colours and ridiculous 'new' Zs values for circuit breakers due to a theoretical lower voltage of 230v.
They just don't like values of earthing arrangements of above 200 ohm as they consider them "unstable" even with a 10mA RCD, although both RCD's would still operate well above that.

10mA is unecessarily low but then we're dealing with the Germans here....

Can you pop a couple of pictures up? I'd like a look at it.....

I have seen single pole RCD's that took up two spaces in (old MEM) boards before, the second space housing the 'Test' button, so three spaces for double pole would possibly follow that pattern in order to switch the neutral too.

Are you absolutely sure the RCD itself is faulty and not some wiring?

I like the way they change a BS 1361 to an 88-3 and then lower the Zs even though it is the same thing.

An rcd will trip beyond the stated Zs readings but the touch voltages will be over 50v which is what is required on a TT earthing system as that is what a hook up should be on a camp site.

As 1664 says, get a pic up of this illusive thing as I would like to see it.

[1664]

An rcd will trip beyond the stated Zs readings but the touch voltages will be over 50v which is what is required on a TT earthing system as that is what a hook up should be on a camp site.

Exactly, which is how they derive the maximum Zs figure; 50v/30mA=1666Ω

I've been hunting an RCD like that this p.m - got absolutely nowhere so if the problem is with the RCD I think some fettling is going to be required to fit a replacement so I'd make damn sure it isn't a wiring fault first Technobadger

[billybigspud]

How did you get that ohms symbol up 1664?

If I were you I would get a sparky round to test your rcd. Explain on the phone, get them round and it will only take em 10 mins to see if it is the RCD or not.

[Technobadger]

I've tested the rcd and it won't trip the wiring is not the issue.

This is very bizzare that no one knows of the breaker type as it is a standard westfalia installation

I will post some pics so stand by boffins

Happy new year all

[1664]

How did you get that ohms symbol up 1664?

You 'steal' it from WORD/OpenOffice. Open a new or existing WORD document, click on 'insert' top of page, then either 'symbol' or 'special character' depending on the version.
This should open a small window which displays all the characters available in the current Font (Times New Roman is usual). Scroll down and keep your eyes peeled for it; once found, click on it and then click on 'ok' and it will appear as text in the document you have open. Then just copy it and paste into your post.
I think there is probably a way of having it permanantly available for use rather than do all that but how often do you use it? Most people don't know what it represents so I usually write the word "ohm", but I do tend to use the symbol if showing a formula/calculation.

[billybigspud]

I suppose the other way is to buy a Greek Lap top

Cheers for that. will give it a whirl.