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The MCB will protect from a short circuit or an overload but it has not been mentioned yet the fact that it will also provide protection against an earth fault. RCD's are generally installed as a means of supplemetary protection from indirect contact and not the sole means. It's also worth...

A Police Station :lol:

Might be a good idea if you live in the UK, but the NICEIC etc probably isn't too applicable if you live in the United States Minor Outlying Islands... :lol: :wink:

A ball-park figure of £300 probably won't be far off. Just think yourself lucky it's not a job for a plumber, you'd be looking at £600 at least :lol:

It's 100 sq. metres not yards :lol: :wink: . Those were the days eh breezer.... :lol: . Maximum Zs to give you a disconnection time of 0.4 seconds is also a consideration along with lots of other things which I won't go into tonight. I failed a ring circuit today which was covering 325...

Osram aren't bad, though there was a major counterfit scam going on for a long time with them. You may have just been unlucky and got some dodgy ones... :?:

You appear to have an extra red at switch 4...hmmm. I'm assuming switches 1 and 3 are supposed to control the dining room lights and switches 2 and 4 are supposed to control the hall lights? You've also got 3 red cables at your lounge light switch...now either it's all wired in conduit with...

You'd better make some noise in the direction of TLC then! I may have a copy but I'm in the process of moving so it's buried somewhere...

It's pretty borderline but 6mm T&E should take 47amps if it's installed as per a normal house (ie not in a thermally insulated wall etc) and just buried in the plaster. This current carrying capacity only applies if you don't use a rewirable fuse. You must fit an MCB (as in the picture above).

All the resin joints I've done (BICC, 3M, Henley etc) have all come with comprehensive instructions. It's not rocket science as long as you make good connections and they are well laid out. You will need a ratchet crimp tool for a start (the DIY compression ones from Halfords are not...

Are the ones in the bathroom Ring too? If not, it could be the transformers that came with the cheap Ring lights (sorry to be harsh but they are DIY store specials!) or you could be replacing the blown lamps with cheap lamps. Either that or they may be getting too hot...are they covered with...

Check your fuse size.

A white cable? That doesn't sound too good...If you're not sure of what you're doing I would get it looked at by someone who does; you shouldn't have a white cable at a switch.

I think masona's been at the laughing beans again, he's been on top form over the past few days... :) I'm in agreement with breezer, does sound like the pc power supply is chucking just that bit too much leakage current down the earth. It may not actually be that much but just enough to tip...

Breezer, I think he must have yellow in the common. If he's got a blue it would make sense that he has a yellow; he must have a twin red+earth and the three core in between the switches. If you changed it exactly for how it was I don't see you should have any problems. If you have got yellow...

What's going on??? :roll: :roll: :roll: Matrix...POWERSUCTION...and maybe STEAMSPRAY...same person perhaps?

You need to sleeve yellow cables with a red sleeve not the other way round; there is never an instance (other than 3 phase) where you would need to sleeve a cable with yellow. You can't use singles unless you're going to provide them with some mechanical protection. As for the fan supply, just...

If it doesn't work when connected in the sides, then connect it in to the top and bottom. The worst that can happen is that it just won't work right. I have had this before with intermediate switches. Manufacturers seem to differ, some connect both strappers in L1 from one switch and both into...

Purple carpet , you poor thing. Best thing to do is bin the purple carpet and buy a new one. Either that or dye the whole carpet red .

You've done something wrong :D . Look at this.