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Well the other day I was stood outside the garage (albeit with the door open), and a fan heater was running inside, and it tripped... Pretty positive it's nothing to do with standing on something etc, as I say it's concrete floors and ALL the wires are surface mounted in plastic tubing. There's...

Hi guys, Sorry - when I said B30 breaker earlier, I meant B32... The overcurrent fault is definitely not happening due to having too much power being used by an appliance, as I say it often occurs when I have just one low power device running. It's nothing to do with inrush current because it...

They're definitely not RCBOs, they are RCD protected but the RCD is separate and doesn't trip. The problem never occurs when a tool first fires up... two recent examples, I was just using the vacuum cleaner (nothing else plugged in) - a few minutes in it trips. Then last night I was just...

Hi folks, I'm experiencing an intermittent fault in the 13a socket ring in my garage. From time to time, when you're using any appliance, it will trip the B30 breaker in the garage's consumer unit. Occasionally, say 1 time in 3, it will also trip the upstream B40 breaker in the house's...

Why are you even bothering to remove it? Seems like a lot of panic over nothing? If you're really insistent on worrying over nothing, wrap the thing in a bunch of layers of plastic sheeting and then forget about it. If you ever happen to get your roof replaced have it removed at that point in...

This is roughy the sort of thing I'm referring to - http://www.blackmountainquarries.co.uk/wp-content/uploads/2013/08/Brown-sanstone-random_1.jpg

Hi folks, Trying to gauge the approximate cost of having natural stone walling built - the kind made up of random lumps of essentially rubble with one flat(ish) face - typical around churches etc. I've got around 200 square meters to lay as part of a project - essentially a border wall 1.5m...

Haha, thanks for the advice everyone.

Hi folks, I'm pondering having a driveway laid next week - natural stone tiles on a concrete bed - about 38 square meters - but I'm worried about the frost. Can anyone confirm if it's likely to cause a problem for the bedding mix? We're getting quite heavy frosts in early mornings here at the...

There's two RCDs in the house, I think it's one for upstairs circuits and one for downstairs circuits... 4 MCBs each I think. Hopefully the last question - is it worth putting another 30ma RCD in the garage CU? This would be downstream of the one in the house CU, but does it offer additional...

Hi John, Ah sorry, I didn't realise the impedance was measured out to the substation. How on earth do you measure that?! I am aware that replacing the CU is notifiable... :) The CU in the garage is fed by a 10mm armored cable from a B40 MCB on the house CU (which has a 40a RCD on it too). I...

I would imagine the Zs will be low as it's just one cable from the MCB straight to the single commando socket? There are no breaks/connections. As it happens I think I've decided just for peace of mind to just put in a new consumer unit, with 3 MCB slots... then I'll just put the compressor on...

Thanks for the help everyone. I'm trying to find out what the normal operating current of the motor is, it isn't in the manual and the thing hasn't arrived yet, but I presume it will be around 23A when it's at full load (4hp motor, 240v). The maximum inrush current on the motor is 'up to' 40...

Thanks EFLImpudence, why do you say it would not be ideal to mix? Just because of the mechanics of trying to fit it all in? I'll give some thought to just using 4mm instead. I wish I had wired the ring with 4mm in the first place! Final question I didn't think of previously - I can't seem to...

Hi folks, I have a 2.5mm^2 ring circuit in my garage, wired off it's own consumer unit. The consumer unit has two MCBs - one for the 2.5mm ring, and one for the lighting circuit. I wired it all up myself, the unit is fed from a 10mm^2 cable coming from in the house. I'm fitting a bigger air...

Hi folks, I had 20 plastic weatherproof bags of cement delivered a few weeks ago, was expecting to use them but the weather turned. Will it do them any harm leaving outside in the freezing temps / frost / etc? Been there for a few weeks now... I put them under a tarp to help keep the rain off...

Depending on the size you might be able to use whire wheel on a angle grinder instead of a sandblaster. You can clean just about anything up with a decent one of those. This won't be as quick as sandblasting though. I would be nervous about using a need gun on old stone, in my experience those...

Those elbows on the outside of your building look like pushfit elbows to me, I would chisel them out and replace with solvent weld... To my mind it's not a good idea having a push fit elbow buried inside a wall... A solvent weld one will never leak but pushfit I would always question when it's...

Hi guys, The stone is like a sandstone, imported from India stuff, quite light in colour. I think maybe it's very absorbant so it sucks the moisture from the mix a lot and prevents a good bond? Just guessing... been told it won't stick to normal mortar very well... Was planning on putting an...

Hi guys, SBR being added as the patio stones being used are notoriously hard to stick to - leading to them being loose once you're finished laying. Also, it's quite an intricate shape with some quite expensive stone (and some quite small bits) so want to make sure it's rock solid. Just not...