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Oh, thanks. As I understand you are suggesting instead of simple butt joint to interlock two crossbeams using mitred bridle joint, and then attach them to the post. This would spread the weight, lock the beams together and require less attachents to the posts. Thanks. Though this would be a bit...

I'm building an odd half D-shaped pergola and would like some advice on joining the 6"x2" beams and 6"x6" posts, where they do not meet square or flush with the side of the post. There is 100 and 1 ways to do this in theory, but I wonder if there is a "preferred way" to deal with this? Once the...

Just to say it was parasitic pick up at the end. I isolated rcds one by one and voltage gradually droped. I put also a 9v battery on one end to test, and ot was fine. So after contemplating a bit and since laying new cable is out of question, I've connected power supply from heatlink to...

All is solved now. Thanks everybody. I've connected the heatlink and nest thermostat via that existing sensor cable after all, as laying another cable is out of question. I thought if the passive thermistor sensor circuit could work fine like that, so dc power supply should be also ok. It works...

Basically it looks like it picks up a bit from every loop in the house, when I isolate rcds one by one voltage drops away. Ok. Now the main question will the thermostat and heatlink like such dirty supply line. Any ideas? I connected a 9v battery on one end I read it fine on another, but it...

Thanks. Yes, normal Fluke multimeter. This is good point about a load. I will probe it with a resistor. It still shows 5VAC when sensor is connected on other end. 10VAC and 3VAC between eaxh core and earth. So it made no sense to me. So yiu think it won't interfere with dc supply when...

Thanks. I asked on electeical forum. I do not relly want to run a new cable, this would be a major job. It is about 10m through four walls, kitchen units, toilet etc to go through. A lot of plasteting too. Yuck. I will spend weekend playing with circuits to see if i can get rid of it.

I have a Danfloss tp9000 programmer and TS2 room sensor which is controlling the Ideal Heat 15 system boiler. I'm trying to replace it with a smart thermostat by Nest, replicating this set up https://d3vlabs.com/2016/12/09/install-nest-tp9000-ts2-danfoss-3rd-gen-uk/ There are 3 lives, 3...

Thanks. Few volts is quite a lot of emf in my undestanding for parasitics. It is about 15 m cable to the sensor though. Another thing which points to inductive pick up is that this is ac voltage and 5VAC is measured between two cores, but between each core and earth there is 10 and 3 VAC. Which...

I can isolate the whole house or boiler, rest of rcds are just sockets and lights, shower etc. When I flick the master no power is anywhere. I just don't undestand why one would have the voltage on this circuit. Induction is a good idea, nornally sensor wiring should run separate from mains to...

Basically I'm trying to reolicate this. https://d3vlabs.com/2016/12/09/install-nest-tp9000-ts2-danfoss-3rd-gen-uk/ But remote sensor connection wiring really puzzles me.

Few people already posted about installing Nest heatlink and termostat to replace Danfloss tp9000 and TS2 room sensor system. So I thought this going to be a straight job, but I've got some surprises. Basically when I removed the tp9000 programmer in the kitchen I've got 3 brown neutrals on N ...