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Don't they always cut the red wire?

Touché. Are you stalking me? You're not going to steal underwear from my clothes line are you? :eek: I admit that I have some minor issues with ****ing damn pieces of **** ******* plastic ***rt*** Screwf*** trunking that's ruined my sodd*** wall, but facts are facts. Makes sobering...

Approximately 30% of all burglaries occur in properties with burglar alarms (Source: Crime Survey for England and Wales, Office for National Statistics, 2016). Since ostensibly the crime survey is a score card for how well you do your job and peddle your wares, I would have thought that you'd...

I hate you. You've just reminded me that I have a mitre box and an adjustable mitre saw but didn't use either. Reaching again for my emoticons...

Never go for an internal sounder in preference to an external one. You want to deter the intruder the moment the perimeter is penetrated. That means making as much noise as possible at that very moment, rather than waiting for them to get into the bedroom where your goldfish are. Only add an...

OP here. Yes. That's exactly what's happening. Thank you. You can be gentle or rough with it, it just won't click into place. I'm assuming that all you guys have used this (Tower - now Schneider Electric) brand so I can only surmise that my 2 x 2m lengths are duff. Perhaps the channel...

I doubt that this would work for lengths < 300 mm and certainly not < 150 mm. Anyway, I'll see when I add another cable...

They range approximately 1700 mm to 150 mm. It gets a bit messy in the area of some equipment enclosures. I think that you're right. With hindsight I could have done most of it your way. The real learning here is that I should have used the stuff from downstairs upstairs. It was from B&Q...

So, first image is how it's meant to be. This is from the underside, as if you were the wall. This was only achieved by sliding the corner piece onto the trunking channel with the top cover already in place. Consequently the wiring has to be drawn through the trunking as if it were conduit...

You're absolutely correct. That's exactly what I thought, and it's what I've always done with trunking. So off to Screwfix I went whistling a merry tune :) Your step 4 is impossible. :( If you look at my piccy, the short sides of the trunking are moulded so that they're not perfectly...

This is the channel profile in section:- From what's been said here by others, I think I know the reason I'm stuck. If you look closely, you'll see that the open side is slightly tapered together. I have 4m of trunking exactly the same. This means that the tees and corner pieces cannot...

Okay thanks but none of that is Tower trunking. I tried to be explicit in the fact that the corner and tee fittings DO NOT CLIP ON FROM THE FRONT. They slide on as far as I can tell. That means that a large run has to be started at one end and fully installed as you go along, and then cannot...

I refer to stuff like this. It looks like typical trunking. Thing is, I don't know how to use it! I don't consider myself uneducated, but I can't figure out how to put together a run with corner and tee connectors. The only way I can assemble a run is to attach it piece by piece as I go...

I've just mounted 4 of these the same way using yellow Rawlplug Uno plugs into 5mm holes. Excellent for lightweight stuff like this.

I'm specifically referring to the Pyronix KX15DQ PIR. It's this... When some sort of detection event occurs, the indicator light flashes. There are two flash types. 1. A long steady on, which I assume is a full detection event of something wandering around in front of the sensor. 2. There...

I've done a search for "PIR" and there are no recommendation threads for the last 2 years, so perhaps it's time to ask again. Technology changes so rapidly... Is there a common internal wired PIR detector that is recommended? I'd like to exclude pet tolerant varieties. Other than that...

Might it then be cheaper /quicker to install a standardised system then? Surely the effort of tracking the wire arrangement for each site is troublesome? If a fitter has 20 clients, it must be a pain to keep records of each installation and leads to mistakes. I'm only imagining what would...

This is the little instruction leaflet inside one of the contacts I used. It's not the cheapest (grade 2), but not the most expensive:- CQR in all their wisdom use red for the detection circuit. 4 core has red and you probably wouldn't use 4 core for any type of active sensor requiring...

omega015, if black/red are used for power, does that imply most professional installations feature at least 6 core cable? The smallest /cheapest cable from B&Q is 4 core which would be contact circuit and tamper circuit.

I've just had to fiddle around with another burglar alarm, and wondered what all those colours in the detector cables mean. There's so many different colours that start with yellow, blue, black and red in 4 core. It then gets even prettier with more colours in higher cored cable. I've never...