The wiring and pipe layout in Cabo Roig bungalow

I wish you luck with this one.

Don't expect plumbing or wiring Standards to be any where near what you are used to in the UK.

I doubt there will be any drawings denoting where things should run and I expect each house will be different.  Both trades will run lines horizontally across a wall so care is needed when hanging things later.  If horizontal is the shortest route, that's what they will take.

No, I don't have any faith in plumbers or electricians in Spain, in fact I basically rewired my new build in Almoradi a few years ago.  Polarity was ignored, the Earth was live and my wife got a shock off the sewing machine.  Heaven's knows where the pipework went.

I hear you, thank you for your help and reply👍

Good luck.   I'm glad I have finished doing all that sort of stuff now except for the odd repair.

Fitting a new shower mixer next week.  I can cope with that!!!!

Properly qualified and registered trades in Spain are perfectly competent and fully cognisant of safety standards etc. The main Spanish wiring system does not use ring mains as in UK, I understand, but a ‘ tree’ system. Much of the problems arise because unqualified labour has apparently been used on many sites.

Indeed you are right.  The ring main is unique to the UK here, they use Radial circuits which are also used in the UK. They have perfectly useable Standards here,  they differ in a number of ways but are fairly similar.  I have copies of them somewhere.

The radial circuit does work like a tree with one cable working a number of sockets. It differs from a Ring main as only one end goes back to the consumer unit and the total load must not exceed the rating of the single feed cable. This has to be considered at the design stage depending on the expected loadings.

Although they have similar Standards here to comply with, there is no excuse for the deplorable workmanship I have come across so many times. I am quite surprised we don't hear of more electrical mishaps.

Sadly many properties here just don't have adequate supplies which overloads the main breaker and causes unnecessary, incredibly annoying tripping.

The other problem is that the supply voltage drops so low appliances may not work properly.  A microwave will not do much below 210 volts and things like fridges may stall causing the compressor to burn out. 

I suffer a lot from this where I live and I have not seen a voltage over 210 V over the whole of Christmas.  The microwave is very hit and miss often needing double the usual time.  Thank goodness for a gas hob.

According to EU Standards the tolerance on the supply voltage is +10% to -6%  ie 253 to 216.2 volts.

I am hoping that things may have improved since I stopped working.

Like Classic Man said. Have lived in various properties in Spain over a decade and electrical wiring "standards" never mind wiring plans are about as common as rocking horse shit - it goes with the mentality that puts a single socket in one corner of an 80m2 room. I have for example lost count of the number of times I have seen a water source in close proximity to a live electric point. If you are planning on living in your bungalow long term, I'd consider rewiring, an option some I have known do, a couple of grand but you may consider it worth it.

There are tools available (look like a standard plug with display) to check the sockets for faulty earth etc.

I recommend to buy one. In addition to poor workmanship, the sockets are rather brittle and do not last 20 years indoors. Outdoors in the sun not even 5 years.

I forgot to mention that they put regular 230V sockets (some with no earth) within reach of taps in a bathroom. 

As Jack E says be very careful and if you have these remove them or at the very least install a socket with an isolating transformer inside like a razor socket which should only be used for a razor, not hairdressing tools or similar aparatus!!!!!

"I forgot to mention that they put regular 230V sockets (some with no earth) within reach of taps in a bathroom"

This is normal also in France and is  required when refurbishing.