Questions and electrical advice in the Electrical Wiring, Theories and Regulations - Discussions on all electrical regulations in the UK. Including Part P, BS 7671, DPC BS7671:2008, BS 7671:2001 & 2004 Amendment No.2, IEE wiring regulations, 16th Edition and 17th Edition and 18th Edition.

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Hi All, Wondering if I can get some advice. Basically I’m having exposed joist ceilings in my house and I’m in the process of slowly changing all...
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Hi there. I’m hoping for some advice. I currently run a small limited company that provides IT services, both commercial and domestic so I...
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125
Hi all Was looking in to the adibatic equasion as our company will not let us add on to a Ring circuit with 1mm cpc.. I want to give some...
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74
I am writing to express my strong interest in joining your esteemed organization as I embark on the next phase of my career in the field of...
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128
Can you feed a consumer unit from another consumer unit, It would be supplied by a non RDC protected MCB. Is this allowed as I have always seen...
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401
So I’m doing my level 3 design project at the moment, and I’m on the question where you do all the calculations on each circuit, I’ve taken the...
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418
  • Question
Ok, installing a new CU with type 2 SP. The installation has an existing PV 6 panels protected by a 16a MCB at the fuse board. TBH I don't really...
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170
  • Question
an overload current is classified as an overcurrent occuring in a circuit which is electrically sound has a fault between phase conductors has...
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325
Can you get 2 4mm T & E cables down a 25mm conduit that only has a kick and a female bush one end and a 2 g socket including a bush the other end ?
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14K
I'm getting an old fuse board upgraded in an office block. The electrician has just told me that most of the circuits don't have earth cables...
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2K
Can anybody help me with this......I understand the concept of the equation I2 ≤ Iz1.45, however what I’m not sure about is how we obtain I2...
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5K
Just wanted to know which people use. My case. Client converting attached garage into new rooms. Consumer Unit has to move to accomodate this...
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473
Hi, My first post so hopefully I am correct in posting it here. My question is, I am thinking of an IP rated outdoor socket for the back garden...
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509
Do i need an earth rod if i am running a supply to a shed/outbuilding ? The incoming supply to the house is tnc-s
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22K
A switch i saw today has a T+E in the switch and only a single T+E in the light fitting. I'm presuming this means it's junction boxed somewhere...
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736
Shouldn't the lines from the first switch both go into the L1 L2 on the intermediate switch?
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809
I've scoured the internet for what these do and am coming up short on finding information. What are these for? (ie what specific problem are they...
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332
Hello, I am in the process of purchasing a property. I have made an offer, and after my own little survey, I noticed a few issues with the...
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322
Max resistance for an EV earth rod. Would anyone be able to break the formula down or direct me to a video etc with a sample? I'm booked on the...
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307
Can anyone shed some light on this in practical terms? Seems to say if earth leakage is over 10mA you need to run a 10mm cpc?
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458
Customer wants me to mount his EV charger on the back of an external, plastic meter cabinet. The cabinet is a new plastic one at the other side of...
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311
Can someone explain electrically why we can spur unfused from a ring final on a 32a breaker when the cable is 2.5mm rated at max 27a?
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435
Just wanted to say what an amazing book this is. Think I paid 30 quid for it. Its like the on site guide but much easier to read. Great for...
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230
From another thread: I'm thinking about this and it's got me all confuzzled. Don't fuses protect anything downstream ie my laptop's charger...
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815
https://ibb.co/qRhctQk Came across this setup today, upon further investigation i noticed the distributors neutral terminal completly slackened...
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2K
Just reading through my Student's Guide and wondering about nominal amperage. If guaranteed trip is 5x nominal amperage, what's to stop 2.5mm...
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464
Howcomes we use eg a 3a fuse from the FCU to feed a boiler that has 1.5mm wiring? Wouldn't a 13a still be ok and if not, why not? TIA
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903
Hi, A question to all the sparkles out there who could explain this mess to me please. Bought a house built in 2000’s found this 2.5mm2 cable...
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2K
Just saw a vid of someone putting in a CU on unistrut in a domestic property (why, i don't know), and one of the comments said it fails the regs...
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462
A relative recently had an electrical certification done on a rented property. The property was build in 2005 and had previously passed 3...
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2K
Hi, Wickes have just finished installing a pump under the bath. The socket is next to the pump but it is unaccessible due to a sealed bath panel...
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915
Just to notify all those who have not been informed about the Corrigendum to BS_7671:2018+A2:2022 ,This will be published on may 15th 2023. it...
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939
Hello Everyone, I have a technical question that I hope someone can help clarify. We're currently facing an odd issue with a machine equipped...
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395
Don't come across this very often - but I've had a CU delivered for a caravan job (not static btw), and it's been supplied with a neutral...
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1K
I'm a property owner who is needing to get an old electrical installation NICEIC certified. One of the buildings is a small office block with 6...
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2K
Hello :) I'm confused about EFLI which I am guessing should be relatively straight-forward. I can't get my tired brain to figure out how to...
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6K
Hi, I'm currently in my year of my apprenticeship looking for some help with the 2 plate method (feeding the switch). I understand it up to the...
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614
Dear Sir, I'd build a simple voltage divider charger with 1 Amp diode from 4.8 AC - DC adapter (500 ma - output volatge - 4.15Volt) to charge...
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426
Hi This is about a design problem in an assignment. A cable basket containing several circuits passes horizontally through an internal concrete...
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1K
  • Question
hello all have a couple of questions re-some decking lights. I have fitted by Electrician around 10 years ago, He’s spured off an existing...
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500
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