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Greeting I'm looking to replace a bathroom fan but im not sure on which size, L: 2.35m W: 2.1m H: 2.3m which gives a volume of 11.4 CM Now from what i have read a bathroom with a shower is recommended 15-20 air changes per hour or a fan with 171M3H - 228 M3H Is this...

Im currently living in a 1950s semi and we have terrible water Pressure and Flow around the house, Probably not really help by a share supply pipe. We are looking to refit the bathroom and was wondering if it would be beneficial to upgrade the current cold water pipe from 15 to 22mm and T off...

Just been look at how some of my cables enter the back boxes, The cables are run in capping and are not clipped direct to the wall. When it comes to derating why is capping classes as clipped direct when it more resembles Conduit?

First of all I'm no spark and i completely understand that work on the consumer unit in this was my abide to Part P but i have two questions on fitting a Bell Transformer 1) I know you have to provide over current protection for the transformer but what about Earth leakage? I have been...

I have a cupboard over the stairs which has a door into a bed room and the landing. I wish to remove the door from the bedroom and block it up! The wall is made of what looks like 80mm or 3 inch concrete blocks which seem to almost a tongue and grove along the vertical edge. Do these...

I went into B&Q the other day and saw 3 types of 2.5mm twin and earth same length and standard but different prices and manufactures Is their a preferred cable manufacture or is it just a con?

I have a cooker install currently protected buy a 30amp rewire-able fuse, The max rating of the cooker is 5.5kw To me this does not seem quite right! Yes i know 5500/230 = 23.9 amps but if you apply cooker diversity 10 + 30% of remainder (4.1) = 14amp +- 5 for extra plug socket But...

Just been looking at a friends consumer unit and it looks a right mess for a new install, I was under the impression you could cut or straighten a neutral fly lead Is my assumption incorrect?

I have seen quite two different set up for mains bonding of gas and water pipes 1)all earth cables lead back to the consumer unit 2) all cables lead back to a dedicated earth block What's the benefits if any of having a separate earth block over using a consumer unit? What is preferred?

Very stupid question I know but its for a double garage that already has a supply. The reason I'm having a new consumer unit fitted and was hoping to re-use the current SWA in place though I don't know the size Any one know the outside diameters of 4 core SWA or the outside diameter of a...

Im trying to work out cable fill ratios for trucking or conduit of twin and earth and looking for a bit of help; Im trying to run 5 cables into the loft and would like to hide them in a wall/ trucking not a fan of clipped and i know conduit is only really of singles but it seems an easy way...

I have just been looking at some 21 way flush mount consumer units, assuming this was to be mounted at so call roof heigh i.e about 6ft from floor, It would be safe to assume that 90% of all cables would go into the floorspace above, but the unit only supplies 12 20mm ko and a 32mm ko...

I want to plaster over a cable and found the capping method a pain before so I am leaning to the oval conduit. The cable is a single 2.5mm twin and earth from a socket to an fused socket what sized conduit should I use i take it de-rating wont be too much of a factor as the fuse in limited to...

I'm really asking about metal back boxes and earth these to your circuit a lot of people have talked about fitting extra fly leads to the back box to the front panel (switch socket ect) but does it make more sense to eart your back box with the incoming cables and fly off to you panel so if it...

With the addition of the Part P tax it should be near impossible for the average DIYer to work stupidly upon said electrics!! :lol: With that in mind how would one go about getting the electrics checked and signed off as adhering to current standards I.E electrics before the tax or so called...

I need to fit the dreaded down lighter to save space in a place with limited head room. Though i would like to fit something modern and energy efficient. I don't need to worry about spread as its a short corridor about 1 x 2 meters but are these any good...

Assuming their is two fuse spurs attached to dual back box and both are feed from separate circuits each of which are both feed by RCBOs, would this constitute poor design as both circuits would be earthing the same back box?

Ran BG today to ask for an isolator to be fitted. The young lady from their MASTs team informed me that they no longer fit isolator switches, but i could have the main fuse pulled at the cost £120 + vat but they could no guarantee they be back the same day. Is someone taking the P? i...

Good Morning What is the preferred way of getting cables from a CU on the ground floor up to the attic?

I will apologies in advance as I have no picture but I'm going to describe my earthing set up. The main L-N wires terminate before the main fuse in what seems to be some sort of metal block (Almost like a up turned triangle) the earth cable has been fastened below this around the incoming...