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Sounds like you’ve installed microwave detectors if they are triggering with the door closed. You would maybe be better off installing a PIR detector instead. As already mentioned, timeguard are a good make. I look after a site with lots of them an they seem very reliable. Also they use relay...

I was snooping around in our main LV switchroom today and spotted this: We have a 2kA per phase supply fed in to our panel board from an 11kV sub at the other side of the wall in the picture (to which we don’t have access) The cable from the break glass unit disappears through the wall into...

It depends on the supply type to the property, but it will often be replaced as part of the consumer unit replacement works

How new or old is the switch? Although it seems strange I’ve found switches which have poor contacts and arc excessively when operated can sometimes cause RCDs to trip. Do you have a spare switch you could try in place of the existing to rule it in or out?

I fitted 2x lap Euro module usb chargers at my sisters house. They were both used to charge a smart phone and or tablet nightly. Both failed within 2 years and both tripped the RCBO when they died within weeks of each other but failed open circuit so the RCBO could be reset.

The standard spacing I generally use is 600mm from each wall and then every 1200mm in between

It’s absolutely fine to joint the wires inside the new light as long as there’s enough room to physically get them in there.

I’m not familiar with the transformers you mention. Are they wire wound or electronic? Is it set up with one transformer per light? Can the transformers be easily pulled through the downlighter holes?

Expanding foam works a treat

I prefer “chauffeur” to be honest

Well done. I’m proud of you.

No I’m asking you.

You used the wrong name at work then.

Will a 13A fuse fail before a 1.5mm² cable?

No. 4 way splitter is the wrong name for it.

Ahh ok a fused device which will limit the load to a maximum of 13A regardless of how many heaters you decide to plug in to it then. What exactly was the point you were failing to make?

Just post some proof. It’s really not a difficult request if what you say is actually true.

All lies which you have posted on this forum.