No. There are some high level haromised specs, but each country has
its own specific wiring regs, combined with what is or is not common
practice. I'm not familiar with spainsh-specific regs.
Spain may (like some areas of France) have IT earthing systems,
and thus require the RCD to meet the requirement to disconnect
the supply on a short to earth. Alternatively, it may be like
some UK installations which have TT earthing system (earth rods),
which cannot be relied upon alone to pass enough current to trip
the protective current device on a short to earth.
Alternatively, it may be provided to protect all circuits against
risk of electrocution faults. It is not permitted to have a single
RCD protecting all circuits against electrocution faults in the UK,
but it is something you often find less clued up electricians have
"...Less clued up electricians"? Are there no inspections or
permittng authorities in the UK? This would seem to be a major
issue. Can anyone call themselves an electrician and just go-to-town
(so to speak)?
I know in the US I've seen many a botched wiring job, but usually it
is a homeowner, or the handyman brother-in-law who doesn't know what
he is doing. To be a licensed electrician at least requires a
knowledge of the code and usually requires passing a test and having
There are a set of recognised qualifications for electricians
in the UK known as the City & Guilds qualifications, but many
electricians aren't qualified. Government recently introduced
a scheme for domestic installers, but it's based on paying to
be a member of a trade body, and isn't related to the competence
of the electrician, so it's being largely ignored by the trade
(most of whom were not members of the trade bodies) and by the
consumers who rightly see no value in paying extra for it, and
wasn't necessary in the first place. City & Guilds qualifications
are also open to DIYers, and there are usually a number to be
found on any of the courses, and there are many very good DIY
books covering the topic.
Dangerously botched wiring in the UK is very much less of an
issue than in most other countries, in spite of DIY wiring
being very popular. Continuous improvements in electrical
wiring accessories over the years by the manufacturers (each
trying to show they are safer than their competitors) has made
wiring accessories very easy to use, and very forgiving of
misuse. Although there has been a heavy growth in DIY wiring
over the last ~40 years and an increase in the number of
electrical installations (more homes), the number of dangerous
and fatal electrical installation incidents has been steadily
dropping over that time and is now at an insignificant level
compared with other causes of accidental death/injury.
Phase: Brown (rule says it could be grey or black)
That's the rule (by law).
Now, the practical is using a black or grey wire for a switched Phase).
So, in a lamp holder you should use a neutral and a switched phase, so
Blue and Black. The switch receives a phase (brown) and gives a black.
Note, now the law enforces to place a protection wire (Y+Gr) even in
the lamp holders.
Andrew Gabriel ha escrito:
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