Are there any reasons why I couldn't fit a 3A fused spur off the lighting
ring for a bathroom shaver socket?
I figure on mounting the fuse plate high up on the wall, near the ceiling,
where the wire will enter and chasing the cable the rest of the way to the
On Wed, 11 Jan 2006 16:15:39 -0000 someone who may be "JustMe"
Yes and no. Five things.
1) if you are in England or Wales and need to ask this question then
you probably don't meet John Prescott's ideas for inspecting your
2) standard lighting circuits are not ring circuits.
3) if the room contains a fixed bath or shower then you must use a
shaver supply unit with an isolating transformer. A shaver socket is
4) shaver supply units (and shaver sockets) can be wired directly
into a domestic lighting circuit, which is fused at 5 or 6A.
5) look out the 2000 Amendment to the Wiring Regulations to find out
where the shaver supply unit can be located and how the cables can
be run. Do you know what Zone 1 is?
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
Lighting isn't a ring circuit.
You con't need a fused spur on a 5 or 6A circuit.
The shaver socket _must_ be of the large heavy
type which includes an isolating transformer.
You _must_ make sure all the earth bonding is up
to spec for the bathroom, including a connection
to the earth wire of the lighting circuit.
Make sure it's positioned at least 60cm horizontally
from the edge of a shower of bath, 60cm away from
taps, and not anywhere where it's liable to be
sprayed by water (see bathroom electrical zoning
diagrams on the web for details).
No - but you don't need an FCU for a shaver socket fed from a lighting
circuit, anymore than you need an FCU for a light. Bathroom shaver sockets
(transformer isolated) have internal fusing to protect them.
*If PROGRESS is for advancement, what does that make CONGRESS mean?
Dave Plowman email@example.com London SW
Logically, I don't see why not - as the average electric shaver draws less
than 15W whereas most tungsten lamps start from 30W.
In the bathroom, our 25?VA Crabtree transformer-isolated Shaver unit, which
has a user's rocker switch for 115V and 240V, runs chased out 750mm below
its 2A fused spur box fitted near top of same wall, en/disabled by our
second lighting pull-switch that
mainly controls two x 60W wall lights.
The first puller interrupts the 100W ceiling light.
BTW All our lighting circuits in our 10-yr old extension were run off two x
1.5mm2 Ring mains [IMO it was so simple and useful to return a
roughly-10m tail from the "end" of Upper and of Lower floor T&E daisy-chains
to the 2 properly-labelled MCBs in the CU, whatever anybody else says about
Continuity tests back at the consumer unit. You can tell a lot on a genuine
ring by just comparing the resistance readings on the 3 conductors. (i.e.
loose connections etc.)
A radial circuit doesn't have this advantage. However, it is only a minor
one and I'm not convinced that the disadvantages of having a non-standard
configuration don't outweigh it.
Thanks for all the replies. Was aware of distance from water and of using
shaver with transformer built in, but didn't know some of the finer details.
I'll get an electrician to check out the earthing and do the
non-wall-chopping parts of the job.
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