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My guess was that someone measured external impedance (Ze) and forgot to reconnect the earthing conductor to the earth terminal after the test?

Thanks chris for the reply, could you tell me approximately how old this water heater is likely to be or when they stopped making/installing this type in domestic properties?

Hi, I have a Corvec Britony water heater in a flat I have just purchased, I am currently trying to decide how to heat the property. There are a number of old storage heaters dotted around the place but these look like they have been there since the year dot. The property is a top floor flat...

Thanks for the replies - I used the dimplex "how much heat do I need" online calculator to come up with the proposed combination - it used outside walls, window area etc so I think it probably is accurate but I'll hop to the plumbing section to firm all this up. Cheers

Hi, I have a top floor flat (in a block of 4) and am looking to replace the somewhat old combination of storage and panel heaters with the dimplex DuoHeat range. I was thinking of splitting the heating as follows having gone with the dimplex "help me choose": Lounge - 5 * 3.73m, 1 external...

Has anyone received their 2391 results for the written exam? Did mine at Farnborough college on 19th July and received results it in the post this morning and it was a pass for me.

What about using an 8mm & 10mm end straight feed coupler, cut it and fit around the 8mm pipe so as a packer in order to increase the overall microbore pipe dimensions, this will increase the OD to approximately 12mm which a standard clamp will fit around. When you clamp it down it pulls together...

Flog it on flea-bay and then buy the right size mat is what I would suggest - I suspect you wont loose a great deal of money and at least you won't be running risk of putting it down and then having to take the floor up because of a problem later on either caused by your modifications or some...

Anyone doing 2391 on this forum at farnborough ? I've just received my notification of my written exam that I've been entered into will be next thursday, 7th June. Funny thing here is that the course doesn't complete until beg July so plenty of theory left to do. Just phoned college...

Hi, I hear there exists a thing that is used to simplify making good around newly cut cutouts for backboxes - I was told it is some sort of rubber _thingy_ that sits inside the cutout - you make good up to it, let is set and you remove it by collapsing it inwards. Sorry for the rather...

Hi, Sorry for the delay, been out of tinternet access - there is no oven in this arrangement - it's purely provides a small cooking facitlity heating, cooking using pans only. With regard to being in the centre of the ring - it's probably skewed slighly from centre but not so bad - it...

thanks RF for speedy confimation - I agree with you regarding FCU and it will also be quite easily removed when there is no further need for it. Cheers ~rlc

Hello all, Is it acceptable to spur off a ring main feeding a small kitchette area with a 13A switched FCU in order to supply a small 2 zone hob. The maximum demand of the hob is 2.9kw total (1~12.5 amps) and the demand for the ring in reality is small. The FCU being located above a small...

For general purpose RCD's i.e non delayed RCD's your figures are correct as I understand in providing supplementary protection against direct contact. The 5x test - where the device is intended to provide supplementary protection against direct contact, a test current of 150mA, applied for no...

don't forget to do a small pull test once you crimped just to check the mechanical integrity of the join too

Hello all, I'm trying to workout exactly what fuse I have as my primary overcurrent device and its short circuit capacity. It has the following markings on the barrel: English Electric BS88:1952 195 440AC4 TYPE RHL 60Amp Thanks ~rlc

:lol: I agree its not the most attractive thing to have on show - I'll try and get it routed on the inside but just wanted to confirm should I need to go this route as last resort. Cheers RF Lighting for your help

Can a main equipotential bonding conductor be routed from the MET via the exterior of the building in order to bond the water service pipe at the point of entry. Reason I ask is my gas and water service pipes not co-located - the gas is in the same location as the CU but the water is at the...

Thanks - that covers the one which is a traditional type rad - the other one is more a towel rad similar to : http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=101234&ts=38994&id=22694# Looking at it, the only possible way of bonding this is to bond one of the rails using a EC14 clamp as its...

Hello, My house is lacking supplementary bonding throughout the bathrooms - the rads have microbore pipes feeding the them. The EC14 earth clamps are spec'd at 1/2" - 1-1/4" so are not suitable - could someone tell me what clamps should be used for microbore pipes ~8mm OD. Thanks