old wireing, how safe is this config' ?


Old 09-30-05, 11:48 AM
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old wireing, how safe is this config' ?

ok , i live in an old mobile home in the uk.
we've 2x bathrooms/shower units , all wires are coded red/blk/ bare earth.
and are multi strand copper (6).

curcuit runs from the main fuse pannel though a switch then a junction box and on to the first shower .
from the junction box a spur runs to the second shower in the next room via another switch with just the red wire, i assume this is the hot one, being switched.
this switch just kills power to the spur while obviously the other shuts down both.

1, are the cables up to it should both showers be running?

2, how big/small a fuse should this circuit run from?

3, should it be fused seperately from lights , emersion heater, or the sockets . seeing as its a 4 fuse box with 2 dedicated to light circuits , 1 for the emersion and the last for the sockets?

service provider has fitted a modern rcd unit at the line in/meter.

cheerz in advance, geejay.
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Old 09-30-05, 12:10 PM
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Without the electrical specifications of the showers, it's probably not possible to say. When you say "(6)", are you giving the number of strands, the gauge of the wire, the number of wires, ...? In other words, six of what?

I don't know how many people we have here who are knowledgeable in UK codes. Electric showers are fairly uncommon in the US.

The RCD is good.

Is this a brand new installation and you're not quite sure the installer knows what he's doing?
Old 09-30-05, 01:47 PM
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hi john, 6 stranded, twin+ earth about a quater of an inch diameter inc' insulation (each wire).

shower unit reinstallation due to leaking cubicle ( knackered the flooring but thats sorted)
uk mains= 230-240 volt.
originally wired in by previous owner, unsure of his competence.

just found the intructions for this shower, the other should be much the same.

spec and recomendations.

unit rateing;- 6.5-7.o kw

circuit protection;- 30/32 A mcb or 30A cartridge fuse.

consumer unit switch rateing;- 80A plus

both switches on this circuit ( main and spur) are old type trip switches.
manual states ' don't fit to a spur' .
i take it it would overload the circuit with both running .

i wish i hadn't started looking into this as its always worked fine.
i'll have to check which fuse this is running through, if at all.

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