One luxury many Brits, who live here on the Costa Blanca, treat
themselves too is a swimming pool. If you are one of the lucky people
that have such an item, then there are some considerations that you
should make, to ensure that your pool is safe.
Now as we all know electricity and water don’t mix and of course in a
swimming pool there is a considerable amount of water. Also connected to
the pool there is a pump, to circulate the water through the filter
system, often one or more lights and in some cases, a heating element
all of which require electricity to work. There are some very strict
rules and regulations regarding swimming pools, however, I have often
found that many have not been adhered to. I will try and list few things
that you should check for, in your pool.
Firstly the earth, the general construction of swimming pools here in
Spain is to use lots of re-enforced concrete. This means that there is a
lot of steel in the ground, which creates a good earth protection
around the pool itself, however, if an electrical fault occurred inside
the pool or inside the pump/heater then that fault could potentially
make the water live. an example of this could be if the pump/ heater
goes wrong or the casing of the pump breaks for any reason and the water
makes contact with the electrical components inside of the heater/pump.
So to try and protect against any potential fault we must ensure the
pump/ heater is connected to earth separately, as this will help divert
the fault to dissipate.
Another very important device that is vital, is a local Residual
Current Device (RCD) or Diferencial (Spanish). I have often written
about the need for an RCD in your electrical installation. In most cases
the pool pump is located some distance from the main consumer unit/
fuse box located inside your home. An additional RCD which should be in a
closer proximity to the pump/heater provides you with added protection,
as any potential fault will be detected quicker due to the reduced
amount of time that it takes for the fault to reach the closest RCD
Underwater lights must always be low voltage, in most cases this is
12 volts but can sometimes be as high as 24volts and of course the
lights must be water tight. To enable the lights to work the mains
voltage, which is normally 230volts, must be reduced to the required
voltage via a transformer; in most cases you should have only one
transformer per light. One of the contributing factors to bulbs blowing
is due to the fact that the transformers are not designed to run more
than one bulb. Another reason that bulbs blow is that the cable feeding
the lights is too small. Although the bulbs can run on 12 volts they
often require a current of 25 amps which equates to a 6mm2 copper cable
(not considering volt drop).