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Replacing Legrand RCD with another make?

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george - dicegeorge

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Jun 17, 2014, 7:19:24 AM6/17/14
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Can I replace a Legrand RCD with one of another make,
will they all fit in the box?
Ebay has Wylex , Protek and MEM which seem similar

Mine got dust in it.
DX RCD 100A 2P 100MA Type AC-S
http://www.voltimum.co.uk/e-catalogue/brand/legrand/product/602711

[George]

Bob Minchin

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Jun 17, 2014, 8:45:55 AM6/17/14
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Depends. The usual issue is the positioning of the tabs on the bussbar
not always aligning.

I've seen compatibility questions like this answered on the screwfix
forum or asking at the electrical wholesaler someone on one side of the
counter or other will usually know.

ARW

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Jun 17, 2014, 1:30:34 PM6/17/14
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"george - dicegeorge" <diceg...@hotmail.com> wrote in message
news:lnp87s$153a$1...@news.enta.net...
So that's the main switch - does it have to be 100A and remember it is a
time delayed model. I'll have a look in the unit in the morning and see what
we have. I am sure I have a 80A Wylex model. Anything I find you can have
for the cost of postage (I make all regular poster the same offer). At least
I will align up a few different main switches for you in the morning to find
suitable switches from different manufacturers if we have nothing of use.

One other option would be to have a seperate RCD main switch in a seperate
enclosure to your CU - Legrand 100mA time delayed main switches are not
cheap.

email me your mobile phone no so that I can text you during the day with any
info I get.

--
Adam

george - dicegeorge

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Jun 17, 2014, 7:06:44 PM6/17/14
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I didnt know it's time delayed.

So should this be upstream of the 2 remote consumer units which I have,
if I convert them from the old wire fuses to RCDs?

And use a normal non-time delayed RCD Consumer unit for new circuits?

[george]

John Rumm

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Jun 18, 2014, 8:32:30 AM6/18/14
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On 18/06/2014 00:06, george - dicegeorge wrote:
> On 17/06/14 18:30, ARW wrote:
>> "george - dicegeorge" <diceg...@hotmail.com> wrote in message
>> news:lnp87s$153a$1...@news.enta.net...
>>> Can I replace a Legrand RCD with one of another make,
>>> will they all fit in the box?
>>> Ebay has Wylex , Protek and MEM which seem similar
>>>
>>> Mine got dust in it.
>>> DX RCD 100A 2P 100MA Type AC-S
>>> http://www.voltimum.co.uk/e-catalogue/brand/legrand/product/602711
>>
>>
>> So that's the main switch - does it have to be 100A and remember it is a
>> time delayed model. I'll have a look in the unit in the morning and see
>> what we have. I am sure I have a 80A Wylex model. Anything I find you
>> can have for the cost of postage (I make all regular poster the same
>> offer). At least I will align up a few different main switches for you
>> in the morning to find suitable switches from different manufacturers if
>> we have nothing of use.
>>
>> One other option would be to have a seperate RCD main switch in a
>> seperate enclosure to your CU - Legrand 100mA time delayed main switches
>> are not cheap.
>>
>> email me your mobile phone no so that I can text you during the day with
>> any info I get.
>>
> I didnt know it's time delayed.

That's what the -S on the end suggests...

> So should this be upstream of the 2 remote consumer units which I have,
> if I convert them from the old wire fuses to RCDs?

Its designed for situations where you need to cascade RCDs - often seen
in TT installs where all circuits need RCD protection for property and
infrastructure protection, but you still need it to discriminate with
downstream RCDs present for shock protection.

> And use a normal non-time delayed RCD Consumer unit for new circuits?

Yup that would be ok. You could also use a split load with a main switch
should you need non shock protected circuits at that CU.

Do you have a TT install?

http://wiki.diyfaq.org.uk/index.php?title=Earthing_Types


--
Cheers,

John.

/=================================================================\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\=================================================================/

george - dicegeorge

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Jun 18, 2014, 11:16:02 AM6/18/14
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>
> Do you have a TT install?
>
Yes.
>
>

ARW

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Jun 18, 2014, 2:44:37 PM6/18/14
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"george - dicegeorge" <diceg...@hotmail.com> wrote in message
news:lnsafi$1gng$1...@news.enta.net...
>
>>
>> Do you have a TT install?
>>
> Yes.


Then you will need to do some remedial work to make things safe. The socket
circuits need 30mA RCD protection.

And how remote are these CUs?

--
Adam

george - dicegeorge

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Jun 19, 2014, 12:49:04 PM6/19/14
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all the old circuits are on one 30ma RCD at the main fuse box,
but if i had them more separated then less would trip off
when ever something trips.
Havent had a trip for quite a while though - except thunderstorms.
But some wiring is very old and rubbery.,
I'm slowly replacing it as I find time.
Distance to the 2 submains is about 16 yards.
[george]


george - dicegeorge

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Jun 28, 2014, 7:16:32 AM6/28/14
to
Maybe I should get a separate consumer unit
with a time delayed RCD,
for the 2 distant old consumer units,
this seems simpler,
any recommendations please?
[g]

ARW

unread,
Jun 29, 2014, 4:40:48 AM6/29/14
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"george - dicegeorge" <diceg...@hotmail.com> wrote in message
news:lom86h$d0j$1...@news.enta.net...
> Maybe I should get a separate consumer unit
> with a time delayed RCD,
> for the 2 distant old consumer units,
> this seems simpler,
> any recommendations please?


When I get back from work today this time I will dig out a RCD for you. You
will just need and REC2 encusure

--
Adam

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