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So following having a read the other day of both the on site guide and the full BS7671 regs that I have, it dawned on me how much of a impact grouping of cables as per table 4C1 has, and how I suspect that what my electrician did back in 2013, violates the regs. I'm trying to work out that if...

Except a 4mm radial (like I have in my kitchen) would de-rate the cable to 30A which is less than the 32A over current protective device typically used these days. Not many 30A RCBO's/MCB's around as far as I know.

OK, but would you use galvanised or PVC capping?

But surely that would de-rate the cable as it would then fall under reference method B or possibly A?

So lets say you were doing a re-wire and needed to chase out walls to run new cables, would you bother using capping over the new cables before plastering over the chase to fill it in, and if so, would you use plastic or metal capping? I know that both plastic and metal capping provide no...

Wait, I found this: https://liverpool.gov.uk/planning-and-building-control/building-control/building-regulation-fees/fees-for-domestic-extensions-and-alterations/ Does this mean that for Liverpool council to sign of work carried out by someone who is not registered with a Part P scheme, that it...

So for notifiable work that falls under the part P of building regulations, work has to be certified and signed off to the local building authority. From what I know, the typical way this is done is either using a "certified" electrician who is registered with self-certification scheme like...

Can they be accessed without a tool or not? I guess you could possibly argue that your trunkings cover could be removed without a tool using just ones own fingers. I know it's common to get single insulated cables within commercial trunking applications, however in those applications the cables...

I have not even viewed the property yet, assuming I even get it. It's a 3 bed, semi detached, one bathroom + downstairs WC house in the north west. I have a Vaillant 937 storage combi boiler atm, which is fine for the most part; but like all combi's, it becomes an issue when it breaks down on...

Now why would you drill directly above a light switch!?, in it's vertical safe zone.

Was just looking at a 3 bed semi detached house that has no central heating what's so ever and was wondering what would be better for a new system? Combi boiler or a System Boiler with a unvented HW cylinder?

As far as I know, even combi boilers when heating the hot water to the taps, still use a secondary heat exchanger for the hot water to the taps. In other words, the hot water being drawn from the taps does not pass through the primary heat exchanger above the gas burner, which is shared with...

Hi all. Does anyone know if there are any combi boiler that can heat both the hot water and the radiators at the same time? I know most don't, but was wondering if there was any exceptions? I can't see why this would not be physically possible as you could have a diverter valve in the boiler...

Thanks for that link, trying to get and wrap my head around how feasible it would be to renovate a Dorlonco based property like shown below as this type of constructions is a new thing to me? Got lots of questions like: 1) Can you drill holes to run new pipes/wires through the house whilst...

Hi, some I know is looking at a house in Liverpool what is of non standard construction and according to them is made out of I Doncello Concrete Blocks. Trouble is, I can't find a thing online about Doncello Concrete Blocks? Maybe they heard wrong when they spoke to the estate agents, but...

I was more thinking of the space in between the joists where the cable was in free air than the bit through joists. My flawed, stupid and bizarre logic was that like how water conducts heat 5 x greater than air, if one side of a T&E cable was always in contact with the wood joist, that would...

So I know the Pyronix Enforcer v11 panel supports a number of wired expansion devices such as wired keypads and the Euro ZEM8/ZEM8+ input expanders using the RS485 protocol. My question is how much electrical current can the Enforcer V11 handle? Is it 500mA as given by the fuse or less than...

I guess what I'm getting at here, does a cable have less effective cooling when in free air such as when run through joists than when clipped directly to a wood joist in open air for example? i.e. Would the direct contact with the wood have greater thermal conductivity/desperation into the...

Say you had a cable running horizontally through floor joists without any thermal insulation (assuming horizontal cable support requirements were met), how is one supposed to know how much to de-rate the cable by and what the de-rated current carrying capacity is for a given conductor size...

You saying there is no need for things to improve over the decades? You can hardly argue against that adding a CPC to lighting circuits (14th edition) or protecting nearly all sockets with a 30ma RCD (16th edition) for example was a good thing surely?