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Topic Title: old wylex board
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Created On: 14 February 2013 11:51 AM
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 14 February 2013 11:51 AM
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jamesrussell

Posts: 81
Joined: 11 January 2008

went to see a chap thats having back of house extending wanted quote for electrics so far so good asked to look at fuse board and surprise its old wylex 6 way light ok but all socket rated at 20 amp and a 45a mcb for shower.
I explained that he needed a new cu but he was adament this wasnt option cos like I tried to explain could be fun when connecting rcds.
So I thought leave well alone and just henly 16mm tails and fit a 2 way rcd unit one for sockets and one for lights
awaiting response
 14 February 2013 11:58 AM
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OMS

Posts: 19693
Joined: 23 March 2004

Sounds like a plan to keep you "divorced" from the existing - you could also offer a front end 30mA to the wylex board as well as a upgrade of bonding (which you may well need anyway for your new DB) - and I'm not sure what problem you have with 20A radial power circuits ?

Regards

OMS

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Failure is always an option
 14 February 2013 12:40 PM
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AJJewsbury

Posts: 11502
Joined: 13 August 2003

like I tried to explain could be fun when connecting rcds.

RCCB in a modular enclosure next to the existing CU?

There's nothing wrong with BS 3036 fuses as such - they're recognised by BS 7671 - although cartridge types are preferred.

- Andy.
 14 February 2013 02:22 PM
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alancapon

Posts: 5772
Joined: 27 December 2005

Originally posted by: jamesrussell
. . . old wylex 6 way light ok but all socket rated at 20 amp and a 45a mcb for shower.

Nothing wrong with that, as long as the fuse cover is cut for the mcb, as the cover is designed to contain the effects of a rewireable fuse operating. Nothing wrong with 20A radials either.

. . . I explained that he needed a new cu but he was adament this wasnt option . . .

or perhaps some 6A and 20A retrofit mcbs for the remaining five ways. These are readily available.

. . . So I thought leave well alone and just henly 16mm tails and fit a 2 way rcd unit one for sockets and one for lights . . .

What about the danger of having more than one main switch for lights and sockets in a domestic property?


Regards,

Alan.
 14 February 2013 02:29 PM
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OMS

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What about the danger of having more than one main switch for lights and sockets in a domestic property?


LoL - well we have two installations each with a main switch compliant with BS 7671, Alan

Regards

OMS

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Failure is always an option
 14 February 2013 10:11 PM
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slittle

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If it's an old wylex it may have a wooden back


Stu
 14 February 2013 11:21 PM
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Jaymack

Posts: 4647
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Originally posted by: slittle
If it's an old wylex it may have a wooden back


Or not, I opened one that had no back, just a wooden frame. It was chock full of the polystyrene balls pumped in for the wall insulation. (I've had the same problem with a ventilation grill in a bedroom, this bedroom had a gas boiler in the cupboard).

Regards
 15 February 2013 06:37 AM
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normcall

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You must be wrong about that.
It's against some building regulation or the other to have polystyrene balls (or any other insulation, come to that!) pumped into cavities without checking that no cables are present.
I had a loft full of the stuff once - it was the plumber who found it investigating, why the water had stopped!! Apparently the firm doing it ran out of little balls and had to get another lorry load. No-one wondered were it might have gone!!

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Norman
 15 February 2013 06:49 AM
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Jaymack

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Originally posted by: normcall
You must be wrong about that. It's against some building regulation or the other to have polystyrene balls (or any other insulation, come to that!) pumped into cavities without checking that no cables are present.


Is that a double negative? You must be jesting! This was on the common wall, of an adjoining garage to a house in High Wycombe about 5 years ago, a Wylex wooden board with no back plate.

Regards
 15 February 2013 12:29 PM
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rocknroll

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If you have access to the loft space and cavity pouring in a solution of PVA/water will stop leakage of the balls into areas where the cavity has been breached, failing that drill holes above the breach and squirt in the PVA solution.

regards

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"Take nothing but a picture,
leave nothing but footprints!"
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"Oh! The drama of it all."
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 16 February 2013 09:38 AM
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tomgunn

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you could suggest to him to replace the 3036's with MCBs and new carriers etc - without having to change the CCU - bit better for when the old fuses pop!

Tom

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