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So I've just installed a Pyronix Euro 76 alarm panel (Confiqured and running the system in the DEOL mode with 4.7KΩ for alarm and 2.2KΩ for tamper) in my new house and zone 4 which has two detectors wired in series according to the below (other than the tamper jumper on the second PIR is set to...

So this is my supply at my new property and when I first saw during a house viewing back in July and before I gave it any real attention, I thought it was TN-C-S. Then a EICR later on I had done said it was TN-S, making me think it was split concentric and TN-S due to where the main earth...

Hi all, got a quick question regarding pipe size and flow rate. From where my new 28mm mains comes in blue plastic pipe and then gets reduced to 15mm at the internal stop cock and is all 15mm onwards inside, if i replaced this with a 28mm to 22mm internal stop cock and then run 22mm pipe to a...

Does anyone have a copy of the latest (5th eddition) Electrical Installation Design Guide on them and can look up the current demand assumed for a lighting outlet in a domestic setting? I recall it has been updated from 100W to 30W, but I don't have a copy of the Electrical Installation Design...

So I am soon going to needing to be doing some internal wall chasing very soon (around 55 full height chases for sockets and data points and 20 half height chases for light switches) and wanted to know what everyone is using for wall chasing? My chasing will be internal in traditional red...

So section 7.4.2 in the OSG (Currently page 93) says that Band 1 data cables and Band 2 mains power cables need to be 150mm apart from each other, except under certain cases defined under sub section (a) like where they are enclosed in a separate conduit, are of mineral insulated type, etc...

Quick question, out of the two boilers below, what would you say is the better and more reliable one? 1) Vaillant ecoTEC plus 940 Boiler 2) Viessman Vitodens 111-W Boiler 3) Or how about the Vaillant EcoTEC Pro 24 which is not a storage combi, but has the "aquaCOMFORT System" which is...

So let's say I bought a old house that needed a full re-wire for example and I wanted to do the re-wire all myself (obviously complying to BS7671), what is the process regarding involving the local councils building control when doing notifiable electrical work under Part P. I assume you need...

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...

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...

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...

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...

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...

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...

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...

As I understand it, at the time of writing this (01/04/2025), AFDD's are not mandatory under the current BS7671 18th edition Amendment 3 in most typical domestic settings, however is it worth fitting them if a old place was getting re-wired, say a 3 bed semi detached house? (Yes I know it's the...

Waste plumbing is not my expertise by any stretch, so I don't know how feasible it is, but in the photo below, could the toilet be relocated to the main bathroom? I would imagine the main factor would be which way the joists run, but not sure how I would determine that? Regards: Elliott.

Hi all, someone who I know has a old Sky HD box which they candled their Sky subscription a couple of years ago and have been using it to watch free channels ever since. A couple of months ago (when we had the bad weather in the UK) according to them it stopped working. I went over to theirs...

Can mains Smoke/Heat alarms share the same electrical circuit in the domestic distribution board/consumer unit as an Intruder alarm under building regs/BS7671/ what ever regulation covers mains smoke alarms? Just seems wasteful to waste two ways in a electrical distribution board, not to...

So the other day, I needed to remove the bleeding vent from my bathroom towel rail so I could pour in the system cleaning chemicals to it, having just isolated both valves at the bottom and then drained the water from it. First issue was the hive TRV valve decided to open up when the the...