The thread about colour coding got me thinking.
Not wanting to hijack that thread though.
I was going to waffle on but determined to save you all from that.
So Burglar/Intruder alarms - hardwired not wireless.
We use 6 core alarm cable quite often but in the days before PIRs it was common to use 4 core.
Those having a set colour coding usually picked which colours were for which function and stuck with that.
Those starting their careers when 4 core was common (before PIRs were invented) had a slightly different mindset to those that started on 6 core because PIRs were already in vogue.
Anybody agree/disagree ?