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Even using the 1.724 figure it doesn't add up correctly. And those resistance figures are the figures for the relevant conductors as per the British standard - that was just the best link I could find to clearly show the figures.

No u haven't replaced any sensors, not sure where they'd be or if they're easy to change?? It has a condensor trap and pipe coming from the bottom and I've disconnected that to make sure there were no blockages or anything - also can't see any leaks

Temperature was based on 20 degrees as per standard. Again I think your right with the 100% pure bit but I believe copper in cable is almost 100% pure. Copper resistivity is 1.678 x10-8 ohm/m. Resistance = (resistivity x length) / CSA. I think we've well and truely deviated from original...

Following on from this if you have a 1.69mm like the original post - this would fail to meet the resistance requirement - so best to get rid I think! :)

Its a ferrolli f30b

Yes I think your right john - but if you do the maths behind it the max resistance requirements of cable are actually higher than if you calculated it out using coppers resistivity. For example 1.5sqmm if calculated equals about 11.33 ohm/km and the Max resistance for 1.5sqmm cable in British...

With regards to cable cross sectional areas - the requirement to meet for cable manufacturers is the electrical resistance. The actual size of the conductor is not a requirement. So you can get conductors which will not equate to exactly 2.5sqmm in size but still meet the requirements of a...

I'm taking the advice on board that I need a new boiler! Even so, with regards to the problem I've tried to describe does anyone have any ideas what it could possibly be Just so I can try to get sorted until I can get someone in to replace Its very cold!! Lol

Hahahaha!! Now that made me chuckle! Even in my time of dispair you have to keep a sense of humour. And that is the reason why its a case of fix it myself or a new boiler - no plumber want to work on a ferrolli! Lol

I'm after some help before I resign to having a new boiler fitted! Firstly its a ferrolli boiler (which every plumber I've spoke to said they don't want to touch or try and repair! Lol) I had a problem with the pump (not working at all) so I replaced a few months ago and boiler worked fine...

Radial circuits is what I am thinking! Lol The feed to the rest of the house is in the wall in front room - so you have to use the output from tv into wall and then that carries the signal to rest of house. Is that even normal? I expected to find a 6 way box in loft or something and then run...

I did this about a year ago and had no issues. It makes a world of difference to the room above though - a lot cosier through winter :D

Hi all I have been in my new house a year now and am looking to boost tv signals around the house. I have 6 antenna sockets already installed in the house, living room, dining room, bedrooms. However the signals are quite weak and can be a bit intermittent. I think that all of the rooms...

Hello all. I am soon to put a 'floating floor' in my garage. I am going to lay 100mm jablite / king span depending on how much foot traffic I decide will go through there. I am then going to lay 22mm chip board on top. However. I have an approximately 20mm slope which on my current concrete...

Is there any particular size joist which is require? Or just what ever fits? The room is only about 5m by 3m and I will span the 3m section. If I'm using brackets (and noggins to provide support) should I leave gaps at the end of the walls? Or cut the joists tight to the walls? I have also...

There is about 160mm drop from my kitchen to garage floor so I think the joists will pretty much be on concrete. Some packing to level the floor up. I could use the rigid foam insulation if that would be best. Do you think using 90 degree angle brackets would be sufficient to fasten the joists...

I am converting my garage to a playroom and am looking to install a wooden floor over my concrete slab. I am wondering how best to secure the joists before I put the floor boards down. It's a single wall on the outside so I am a bit dubious about using joist hangers. I was going to put a...

Fair point!! I wondered what a plumbers view maybe, if something I soldered and doesn't leak straight away - will it leak in the future? That's what u was sort of wondering. I'll redo it - and if I use compression I'll cut the pipe back to unsolder we section.

Thanks for all the quick replies! I have managed to get water back on by forcing a lot of solder around the fitting. There are no leaks at present - I am going to tile the floor where it is under though so I think I will get the proper imperial fitting and refit it to be on the safe side. Or...

I need to put a 22mm x 15mm reducer in. I used plastic push fitting into copper pipe first- this held but had a small drip leak. So I tried a copper compression reducer, same issue, small dripping leak. Now I have put a Yorkshire fitting on, added extra solder - still can't get a fixing...