Much depends on the layout and the size of the room. If it could be
tucked out of the way in an airing cupboard for example, then its low
risk. If you have to clime over it to get into the shower, less so ;-)
Despite the obvious risks, the bath is becoming more attractive. Use of the
shower is not a problem as showering's take place pre 9am and post 9pm.
My last kitchen brew had spillage issues and the tops of the walls were
soaking. Inadequate extractor fan and a small window is the main culprit.
The bathroom has a ceiling mounted Velux window and a powerful extractor.
A cassette lead isnot a good idea as the lead needs to be fully unwound
for this rating, to avoid inductive heating. With acassette lead there
will always be the temptation to wind in any spare.
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On Tue, 25 Sep 2018 23:30:58 +0100, Malcolm Race wrote:
The issue of unwound extension cables overheating has nothing whatsoever
to do with *inductive* effects. It is purely a matter of concentrating
the cable into a compact, low surface area lump which reduces the heat
dissipation rate of the I squared R losses in the cable when carrying its
fully unwound maximum rated current.
The reduced dissipation rate results in a much higher temperature
equilibrium being established in order to dissipate this waste energy
into the environment. Furthermore, copper having a significantly positive
temperature coefficient of resistance which can create a runaway effect,
will aggravate this temperature rise in an unwound cable to a surprising
degree. So much so that anecdotes about such wound up cables being turned
into a welded mass of PVC and copper are quite common.
On Tue, 25 Sep 2018 23:26:54 GMT, Johnny B Good wrote:
I made a (very crude) reel for my 27m extension lead. I start rewinding by
tucking the double socket into the centre, so it has to be fully unwound to
use it. The highest load so far is under 1kW, so not much on 1.5 mil.
Many do think the problem is inductive, but there is not induction
because the flow in the live, is cancelled by that in the neutral. The
problem is the resistive heating. The cable warms up because of
resistance, the close coiling limits the ability to dissipate the heat
and the cable melts.
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