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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in the old bpg4 it stated Absence of supplementary bonding for installed Class II equipment where required (such as in a location containing a...
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I've been told I need to upgrade the main earth bonding to 16mm. The consumer unit is on the wall adjacent to the externally mounted incoming...
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535
Hi, The current carrying capacity tables in the BS 7671 for twin and earth cables are only for buildings that have thermal insulation. I'm...
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48
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847
Hi All, First of all apologies for the potentially novice sounding question believe it or not I’ve been a qualified electrician for 10 years but...
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210
Hello I am hoping to find a definitive answer to this as heard. Socket height regulation of 450mm is for new builds only not for old houses...
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Customer has a set up using Electrak 63A under floor busbar, fed in 10mm armoured and backed up with a 63A c type mcb. From this he has 32A...
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hi there, i'm not sure if this is the right forum to post? the blue cable wire on the immersion heater keeps burning out and as happened so...
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Normally I fit local isolators adjacent to 3 phase motors to allow for maintenance. I have been informed that as my main control panel is within...
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19K
I take it you're allowed to use radials for sockets? So why does anyone bother with rings, seems like extra hassle to me.
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Been on a job today and debating what to put on the certificate. The DNO in early 2013 upgraded the supply and installed PME. The previous setup...
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11K
Hi Currently on a job at a hospital where we are installing temporary site supplies to canteen toilet block and office. The supply is Tncs from...
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275
How many regs broken here ? This is a new install and has already been "signed off". Band 1 and band 2 cables mixed in same containment, glands...
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360
  • Question
Costumer have 12 flats and need to feed for each flat a prepaid meter and consumer unit within the flat , the main supply to building is three...
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508
Quick Question. Despite being 50 I am a newbie electrical installer. Preparing for my retirement from public service. Anyways - my Question. How...
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398
OSG Pg.40 says: '[Split CU with 2x RCCBs] is not suitable for an installation forming part of a TT system as there is insufficient fault...
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Hi, I've got to a point where I need to complete the EIC for the caravan I've been working on. This isn't a static caravan, so will be going from...
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285
Hi, I'm not an electrician, but wanted to ask for some professional opinions. My parent's shower isolator stopped working, so they enlisted the...
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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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333
Hi all, Been a while since I've posted - got a new project to install a small 7kw electric shower. The shower will be about 7 metres from the...
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18th 2nd amendment comes in, in Sept. AFDDs are in it. To be fitted on socket circuits of 32A and above. To be fitted in residential blocks of 6...
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Hi, I know the regs say a metal consumer unit must be installed in all new installations, but does anyone know if the same is true of...
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511
I do love my job, and this is a fabulous job to be involved with, but jez the regs aren't clear on this type of thing. In a house, you have...
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203
Hello Say that i had a circuit of a 6mm wire and i want to check of the wire going form the breaker toward the load is one-peice wire NOT two or...
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12
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548
We have an Economy 7 meter and tariff. There are 2 separate fuse boards and one meter with the dual rate on. Am i right in thinking that ANY...
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9K
I am due to sit my 2391 in a few weeks or so. I have been told I need the 18th Edition Amendment 2 (Brown Book) and Guidance Note 3 etc for the...
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426
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Is it possible and how much would a 3m length of 25mm conduit cost
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Grateful for a kick in the right direction on the following: a telecomms engineer stated out that an outdoor metal cabinet (earthed & bonded) was...
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Hi All I am new to this forum so here goes... I am booked up to do my compex course units 01-04. I have heard it is a very difficult course with...
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It seems to be easy, these days, to buy fittings (often containing resin) that allow someone to tee into a pre-existing SWA cable. Some of these...
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398
Hi all We've had some works done in our kitchen which has involved fitting a new cooker circuit, installing some downlights to replace ceiling...
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12
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601
I am designing a wall light . Can the cable leads from the fitting be connected to the mains wiring inside the wall cavity or does the connection...
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360
Done this loads of times before, but this situation is quite unique so bare with me. I've been asked to cable up an out building at a country...
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I have a friend who would like to learn how to service and fix the professional coffee machines as used in the likes of COSTA, CAFE Nero and the...
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6
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443
  • Question
HI I have just had a carbon monoxide allarm fitted by the local Housing Association and he has wired it to the back of a light switch and trunked...
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6
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633
I work in the events industry which works under 7909. This assumes that someone qualified 7671 etc has tested the distor's and designed a system...
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12
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950
Hi all, I have worked out the volt drop on other questions using the formula mVxAxM. had no issues, but this question below has just fried whats...
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26
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How to Apply to gain access to trainee forum - reason - I am studying C&G level 3 through trade skills 4 U. I want to discuss / get help with my...
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255
Hi all I would like to know what should be the rating of Air Circuit Breaker to select for a Genset based on the following data: 2000k VA PF 0.8...
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593
Interested to hear how different people approach doing loading / vd calcs for larger size single core cables in a 3ph situation - ie 3 separate...
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332
Been asked for a light switch to go in a small room with a toilet and no basin, there is a door but you have to go through the bathroom to get...
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14
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1K
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