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So the DOWN RCBO in case 1 or 2 (below) saw an imbalance and tripped. The UP RCBO is capable of doing its job once the DOWN live has gone, suggesting no L to CPC or GND leak or no N to CPC or GND leak on the up circuit. If the neutral for the DOWN circuit was somehow going to GROUND (not the...

So the pre-existing left light with PIR works fine, but the newly added middle light with no PIR and the right hand light with PIR don't work. The middle one most likely doesn't work as it has no power so check its connections, with no PIR it has nothing but that to stop it working. The right...

There's a user manual for it here: http://www.espares.co.uk/datastore/ProductManuals/902208.pdf The stuff in the back still doesn't tell you what the cable gauge is though. Look at the plate on the back of the oven, or if it's hard to move, open the doors on it and look at the side of...

By the shape of the plume up the board and the cabinet above it, it looks like you've had an 'eruption' from the bottom, and by the soot on the 2 left hand fuses it's come from under them. As RF has already guess a cable overheat, I guess it's the modern earth clamp at the bottom of it has...

The repair may of been in plastic for a number of reasons; they may of lacked skills to work copper/it was easier/cheaper/they didn't want to do 'hot works'/the piping system wasn't easy to clear of the last traces of water (which is essential to be able to complete a soldered copper joint...

Very much so John. If it's a new problem then it's thinking cap on and best neuron forward to help out. But my resurrecting post was aimed at provoking thought with the OP or those who may pass by in the future. The OP sounded like somebody who may be studying or learning. And since constant...

Sheeesh who's done that! :shock: When it comes to resurrection of a well loved thread I am but a mere amateur compared to these guys....... http://www.diynot.com/forums/viewtopic.php?t=34549&start=165 Started in 2005, went strong in 2006 then Woody's post from mid 2008 said it all...

Have you checked ALL your cupboards BAN? Ask the wife as she puts everything away.

In devices involving a state change, rising current with falling voltage is part of their normal workings. Probaly the most common examples of this are devices that use a plasma, such as CCFLs or TIG welders. A high (or higher than usual running) voltage breaks down the gas and initiates an...

Definition Noun: Spoo. (Orig: JLord tm) 1) A vaguely connected mess of electronic/electrical/mechanical circuitry that is most likely no longer required for the correct functioning of the system, and even when it was, probably served a purpose that was dubious at best. Such systems clearly...

There's a lot in that and it should be kept in mind. I think a big part of it is to create something that 'assists' life but does not 'rule' it. Many times I've seen systems created that could of been very useful but they failed or hindered due to not been well executed. Often it was in the...

I used these http://tempapano.com/english.asp?id=101 Search round for a distributor in the UK. I've built quite a few panels with Schneider enclosures and these are much cheaper but the same quality. Well turned out, robust and with a good backplate. I went for the EKO series and the metal...

Tile the wall. Grout it completely. Leave the grout to set fully. Mount the bath so that you have a reasonable bead width of silicone. Too large and it's hard to seal/set/too slow to cure, and too thin and it won't stand as much movement/expansion/ be hard to seal. Mount bath so that there's no...

http://en.wikipedia.org/wiki/C-Bus_(protocol)

I can't help you with CBus but some more food for thought for you, having just 90% completed a rewire and built in intelligent control of the lights. After much deliberation, and like ericmark I was also worried about future maintainability, I came up with the following system for lighting...

This is coming away from the original problem (Sorry OP!) but its got me thinking. Folks, check my thinking on this one would you, as to how an unloaded RCD could trip. If the unloaded RCD is still in the board, the supply is TNS and other non RCD circuits are producing a neutral current...

Hmmnn. I'm sure that at least once I've seen an RCD trip for a N-E short with the RCD unloaded. I don't get involved with various types of electrical installations at the rate you chaps do, and rarely have I been involved with a TT system. So I'd say I've seen it with a TNS system, and not PME...

My thoughts exactly. Have I come across (or read?) that sometimes high fault currents can cause a permanent imbalance in the device? The fault appearing as an 'offset' in its performance. So to the RCD it would appear that the circuit was permanetly leaking say 10mA with no load. Making it...

I have, and it does. I've seen it a couple of times where an RCD has tripped due to Neutral and Earth being accidentally touched together. The first time I saw it I deliberately setup the same 'fault' to verify it. Tiny differences in potential in very low impedance circuits lead to significant...

I once looked at a domestic installation for somebody where the immersion heater would sometimes trip out the RCD. Sometimes it would go days without doing it and then all of a sudden it would trip. The board was split into an RCD protected side and an unprotected side. The only thing I did to...