Re: Twin and Earth Cable Sizes

["Paul Robinson" <ukcueman@xxxxxxx>]

First the disclaimer: I am not an electrician.

The size of the cable to feed your secondary board would depend on the load
the cable would take. My lighting will be fed from a single circuit on the
consumer unit via a 6mm cable and protected by a 32A MCB. That goes to a
secondary board which will have 6 10A MCBs, one per 4/8-channel dimmer.

The 32A figure is because every light turned on at 100% (which won't happen
in practice) will use a little below 32A.

If your secondary board was going to use much less power, then you could
use
a smaller cable. And vice-versa.

HTH
Paul

----- Original Message -----
From: "wayne" <wayne@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Wednesday, July 02, 2003 6:06 PM
Subject: Re: [ukha_d] Twin and Earth Cable Sizes


> Ok, just jumping on this thread, If I wanted to add a 2nd distribution
board
> to an existing - what size do you use there?
>
> Thanks
>
> Wayne.
>
>
> ----- Original Message -----
> From: "Jon Payne" <jgpayne@xxxxxxx>
> To: <ukha_d@xxxxxxx>
> Sent: Wednesday, July 02, 2003 4:06 PM
> Subject: Re: [ukha_d] Twin and Earth Cable Sizes
>
>
> > I'd agreed with James. I did this initially and it can get a real
pain
in
> > the a*** working this 2.5mm cable everywhere. 1.5mm is so much
easier to
> > work with - get some :)
> >
> > Jon
> > ----- Original Message -----
> > From: "James Hoye" <james.hoye@xxxxxxx>
> > To: <ukha_d@xxxxxxx>
> > Sent: Wednesday, July 02, 2003 3:04 PM
> > Subject: RE: [ukha_d] Twin and Earth Cable Sizes
> >
> >
> > > > I have a simple question, If i am doing some wiring in
lighting
> > > > circuits is it OK to use 2.5 mm Twin and Earth? It
would save me
> having
> > > > to buy 2 different types of cable, as I know 2.5mm can
be used for
> > > > power circuits (sockets) etc.
> > >
> > > >From an electrical safety point of view I can't see any
issues -
2.5mm
> is
> > > certainly capable of carrying a 5 or 6A load!!!
> > >
> > > What may be a problem is coaxing the larger size cable into
terminals
> > meant
> > > for 1.0/1.5mm cables - oh, and it might well confuse any
person doing
> any
> > > electrical work in the future.
> > >
> > > A 100m roll of 1.5mm T&E is only ?11.99 from Screwfix
[other suppliers
> are
> > > available etc]
> > >
> > > James H