Re: Re: House wiring - follow up

["James Hoye" <james.hoye@xxxxxxx>]

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> >From the electricians guide to iee 16th edition wiring regs
>
> " Where cable runs are concealed behind plaster they must be
installed in
> 'acceptable zones' which are intended to reduce the danger to the
cables
and
> to people who drill holes or knock nails into walls.  Cable runs must
only
> follow paths which are horizontal or vertical from an outlet, or be
within
> 150mm of the top (but not the bottom) of the wall, or within 150mm of
the
> angle formed by two adjoining walls.  Where a cable run has a
diagonal, it
> must be protected by being enclosed in steel conduit, or must be a
cable
> with an earthed metal sheath (such as mineral insulated cable), or an
> insulated concentric cable.  In this latter case, the phase conductor
will
> be surrounded by the neutral so that if a nail or screw penetrates the
cable
> it will be impossible for it to become live.  The internal partition
walls
> of some modern buildings are very thin, and where cables complying
with
the
> requirements are within 50mm of the surface on the other side they
will
> require protection."
>
> our resident 16th regs man (Mr Hoyle?)  may be able to find his OSG
before
i
> find mine to see if the descriton in there is any better. :O)

>from
"Where a cable is concealed in a wall or partition at a depth of less
than
50mm from any surface it must be enclosed in earthed metal conduit
(trunking
or ducting) or installed either horizontally within 150mm of the top of the
wall or partition or verticall within 150mm of the angle formed by two
walls, or run horizontally or vertically to an accessory or consumer unit
(see Fig 7.3.2
[http://groups.yahoo.com/group/ukha_d/files/wiring-regs.jpg])."

James HOYE ;)