RE: Twin and Earth Cable Sizes

["Dean Barrett" <dean@xxxxxxx>]

>SWA

Steel Wire Armoured

>This might be the realy dumb question - but earth to what? back to the
other
>distribution board? there is only a live and neutral off the metre...

Dependent on the age of the house you probably have what is called PME or
TNC-S or combined neutral and earth, but you will have an earth. If your
house is older you may have a TT supply which is overhead L&N with the
earth
being provided by a seperate stake.

Which ever system you have - you will definately have an earth !! (i hope)

>I guess this will most definatly involve pulling the master house fuse
(or
>whatever its technical name it :)

Nooo dont do that - if you break the boards seal, they'll have their
revenue
investigation unit round - you must get them to do that first !! - unless
its an old paper seal then its probably just disintegrated :)

Also if you do this remember to provide the same level of protection
afforded by the first board, if you are a TT supply you will have RCD
protection, if you split the tails via a service block you will remove that
protection to the second board.

Oh - and i'm an electrician too, though i must admit i dont get my hand
dirty anymore :)


Dean.


-----Original Message-----
From: wayne [mailto:wayne@xxxxxxx]
Sent: 03 July 2003 21:46
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] Twin and Earth Cable Sizes




> From: "Neil Fuller" <neil@xxxxxxx>
> > >>First the disclaimer: I am not an electrician.
> >
> > I am an Electrician!!!!!

/me feels better already!

> > That's fine but you could also feed the second board straight
from the
> head using a 'junction box' specifically made for the purpose - A
Service
> Block (TLC order code MK1100) This would save a valuable way in the
main
> consumer unit.

I guess this will most definatly involve pulling the master house fuse (or
whatever its technical name it :)
Thats a side of home electricals that I have never touched - I've always
been the 'safe' side of the master switch.
IIRC that is somthing that an registered electrician is supposed to be
messing with as does it not have to be 're-sealed' by your electricity
supplier? - (or is there a work around?)

>
> Where the SWA comes in from the meter, I'm using 2 x 10 way consumer
units,

SWA? - did I miss the meaning of this?


>
> > Finally, finally - Don't forget the earthing on the new consumer
unit.
> Many do!

This might be the realy dumb question - but earth to what? back to the
other
distribution board? there is only a live and neutral off the metre...


/me may need to get a spark in to do this - :/


Thanks
Wayne.





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