Scope of Part P (extra-low voltage)

What is PoE?

Z.

For cameras the system seems to fail safe.

https://www.youtube.com/watch?v=LU7T-85EIq8

Z.

Or it’s more about geography than voltage

Essentially notifications are a way to limit the trade to certain groups, rather than as a safety measure. It has always been political, and rather misguided. I consider it to be another area where "feature creep" has reduced the quality and training of the electrical industry. ELV systems were never intended to be controlled by the building regulations, and attempting to do so shows just how far the BRs are from any reasonable reality. The Grenfell Tower enquiry has produced a great deal of evidence that they (and just about everything else about the construction industry) is totally unfit for purpose, has no teeth, and are unworkable. The problems are in many cases because the actual words used are unfit to describe actual construction, and these were made ambiguous deliberately by vested interests having excessive input to the BR content. The same tends to be true of BS7671 too, the Standards again being written by manufacturers. The IEC and Cenelec are famous for this! The enquiry has also shown that many of the alleged "experts" were unqualified and surrounded by red tape they did not understand.

Having read that, try reading part P, and carefully consider the words. Is it fit for purpose as a technical document? Does it in reality do any good, particularly when the operative is unqualified and his work never examined by anyone else but at least he is cheap? What does a notification from (club name) actually mean? My answer is (unprintable) nothing at all, in fact rather less than nothing as many DIYers do a better job.

Why was Part P written with appendixes with things such as information on outdated electrical installation practices, which are basically tutorials for DIYers?

Excellent point, I think POE (Power over Ethernet) is a perfect example. Many installations of CCTV involve wires routed through the fabric of the building and installed by DIYers. It plugs into a 13A outlet at one end , but otherwise resembles an electrical installation in every other way (running at ELV).

It's Part P, but not notifiable (unless you have CCTV in the bathroom, but let's not go there). I expect the average installer wouldn't give Part P a second thought when it came to installing a CCTV system.

It's a common problem when industries focus on regulation of best practice. The industry morphs to prioritise the knowledge of the regulations rather than the understanding of the principles. Grey areas are always left and, without that understanding, serious problems happen.

Come on Andy, what is wrong with everyone having access to information, including the electricians? Do you want to be licensed, as in some other countries? Two thirds of the current workforce would be unable to pass the exams to get the licence! Closed shops were an evil idea, they reduced employment. We are now getting the same problem but the mechanism is via completely useless "training" for just about everything, but the excuse is always "Health and safety"! Are there accident statistics to support your argument? No....

And the purpose of appendixes C and D is?

dxu3qlulsm4jd.cloudfront.net/.../200407304599odpm_breg_029960.pdf

Part P is supposed to ensure that electrical work is only undertaken by competent people, which can be a qualified electrician or a competent DIYer, but included advice for those who are unfamiliar with electrical installation work.

You know it makes sense