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....the fence has been been up about 4weeks now and the biggest thing I have noticed is shrinkage - as the boards have have dried out it they have started to shrink and in some places distort - not massively but as you look down the good side you can see small gaps between some of boards. I...

from memory not a lot but I will check at the w/e to be 100% sure. From over hearing the discussion it came across that it was a _new_ regulation that the insulation in the loft space was continuous & needed to run over the top of the lights and therefore these "safety" boxes were required...

Morning all, My task has been to connect something like 40 downlighers in various rooms throughout a new build - during lunch the boss informed me that he is getting a number of plasterboard boxes made to sit over the cans of the downlighters for the following reasons: 1. to prevent vapour...

Thanks securespark - I didn't think it was right when I saw the other day on a job that someone had fitted a shower fan + light kit in a shower room with the ducting pushed to the corner of the roof - I think the problem was that they could not get right to the soffit as the ceiling of the...

Hello, Is it normal/acceptable pratice to vent an extractor fan into the roof space? In some cases it's difficult to get the flexible ducting into a sofit grille so locating to ducting as close to the sofit as possible - would be acceptable? Cheers ~rlc

Andy, some info for the fence I have just put up that may provide some help to you - I hadn't done this before so I was a novice....the fence is approx 36metres and has a sloping section. Some links at the bottom. Basic Materials bought from local timber merchants: 20 of 100mm*100mm sawn...

didn't think of it in those simple terms Thermo......I like that reply a lot & will repeat those words tomorrow morning :D

A "colleague" having seen a picture of my last few weekends hard work informs me that I have erected my fence incorrectly as I have the "corral side" facing the neighbours garden...having never heard of this and guessing on the spelling I wonder if the term is correct....he informed me this is...

.....Used to express impatient rejection or contempt ???

Yes the quoted values are based on normalised values of 1 for current and unit length i.e per amp per meter - this equates to 18milli - ohms per meter of resistance for a 2.5mm^2 from the table.... so for a 2.5mm^2 : 1m @1A = 18mV drop 1m @ 2A = 36mV drop or [email protected] =...

think of a domestic ring supplying a large number of 13A sockets which is protected by a 32A MCB...if the sockets were feeding 13A loads then more than two sockets would over-load the circuit and it would be disconnected by the MCB. The chance of this is unlikely as typically one will feed a...

sime27: does any of this information help you or do you require further detailed explanation - as pointed out it's a fundamental requirement to understand the basic principles, lumped circuit model, nodal analysis, measured / calculated results and what affect they have on the circuit.

I understood the earth conductor should always come to the face plate and if the back box has minimum 1 fixed tab used to secure the face-plate then there was not requirement to earth the back box with a flylead.

does this help.....http://www.cse-distributors.co.uk/cable/steel_wired_armoured_swa_cable.htm you may need to follow on-line link to get prices??

end - 2 end resistances for the phase, neutral and cpc being r1, rn & r2 resp. Taking some dummy values for say 2.5/1.5mm cable: r1=0.54ohms ------|===|------ + r2=0.54*1.67 = 0.90ohms ------|===|----- note 1.67 being scaler based on 2.5/1.5 with no units. R1...

thanks for the clarification on this - I was just working some basic numbers on a simple test scenario passing some time + like the odd small calculation now and again... Totally agree... no problem mate - i did laugh when I looked at the title again :D ...confused myself the second time

Yeah I agree with your "fit-for-purpose" point - I had a CU replaced about a year ago and the sparky said it wasn't allowed and removed it before he would sign-off his work - no problem with that at all and thinking about it , it probably fell into zone 2 anycase - just wanted to see if for any...

Yeah sorry having re-read I'd have to agree at this _late_ time.....I'm clearly bored and was just trying to establish the application of the calculation for current carrying capacity of a cable based on the design equation as stated in the On-site-guide "It>=In/CaCiCgCr" where: Ib = design...

Scenario : 8kW shower, Ambient temp 30degC, clipping direct ref method 1, thermal insulation 400mm, touching / grouped with 3 other circuits 8kw/230 Ib = 34.8A, In >= Ib, 40A MCB Cg = 0.75 Ca = 1 @ 30deg C Cr = 1 as MCB It = 40 / (0.75 * 0.55 * 1 * 1) = 97A OSG Cable selection...

Is it OK to have a "radiant fire" mounted on the wall assuming its in zone 3 within the bathroom (assuming supplementary bonded correctly)? I not totally sure the name is correct but it's one of those which typically has two bars and a pull cord from below. Something from the 60's possibly.