[ColFrancis]

Warning labels, perhaps not. But in Australia I cannot run Cat6 for "safety". I might electrocute someone with the 12V and must get a licensed professional to do the work for me.

A label warning that high voltage is inside is fine, a required label is quite ok, a fine because you didn't put the label on (even though it wasn't explicitly required) is a little bit of a stretch, banning modification is clearly an overreach (in my book).

There is a line somewhere, and drawing it too close to either end is harmful. So now we're arguing degrees, and not absolutes.

[bombcar]

The way this usually works in the USA is a “homeowner’s exemption” - you can run cat6 in your house all you want but you can’t charge others to do it for them without certification/licensing.

Which can lead to all sorts of fun homeowner specials when you buy an older property.

[Hizonner]

You can also have fun times if they used "professionals". Electricians, and especially plumbers, are like termites. In the course of following their own imperatives, they often do serious damage to the building structure. Sometimes they also screw up their own trades, but more often they screw up something else.

[bombcar]

Yeah, even if you're having a custom home built, you either need a really diligent prime contractor, or you need to visit it every day, because nobody cares about anyone else on the job site, and very few companies have all the trades in-house.

Definitely have an independent home inspector do an inspection before the sheetrock goes up. Issues are cheap or free to fix before that step.

[ColFrancis]

A genuine question, from someone who doesn't have the option: would you prefer to have it banned?

[bombcar]

No. It’s very nice, but for things like actual electrical and gas work, a permit is required.

Many people don’t pull permits however - it’s something to be aware of when buying older homes. The advent of arc breakers and GFCI have reduced the chance of serious harm in these areas.

And I’ve also seen (and done) work that was significantly above the base line contractor level (that nobody would pay for usually) just because it was the homeowner bothering to do things very right.

[collegeburner]

In your own house you can not run Cat6? Or is it just can't install as a professional? If the first one, then that is loicense culture gone too far.

[ColFrancis]

I cannot run it "permanently". Basically, I can run it along the floor but not hidden at all as that counts as installing.

https://whirlpool.net.au/wiki/diy_cabling_-_read_this_before...

[pixl97]

Are you talking about running it in your own house?

Because if you're talking about a commercial building you are talking about a non zero chance of setting up a situation that can harm others. It's not about the 12v. It's about you getting it hooked in with 110/220 and killing someone else. People that do it professionally tend to have liability insurance you pay your survivors something.