fault

Have been to a farm today that has a 100mA time delayed RCD main switch covering a DB that has MCB’s on majority of circuits ( less than 32A) and 30mA RCBO’s on sockets, lighting etc. What I was thinking was does this comply with regs as circuits less than 32A should disconnect in less than...

I've installed a garage consumer unit sub-main to an outbuilding in 16mm 3 core armoured, the insulation tests all come back fine - +800Mohms on a 500 volt test but when I power up the installation I get 90 volts leaking to Earth from Neutral and i'm not sure why. The Garage RCD also doesn't...

Hi All Wondering if someone can help. I've recently been receiving a fault with my Accenta G4 alarm Panel. All was previously working with it until one day its froze, so powered it down and back up and it's been stuck at "Accenta G4 RKP F131-01-111" on the screen and I am unable to do anything...

Reported fault was RCD tripping. Another spark had been out and reported a Neutral fault on a ring circuit. As poewr could not be left off he removed the RCD (single RCD 7 way CU) and replaced it with a mains switch. When I arrived there were two "ring" circuits in the CU one on a B32 and one...

Good morning all, A 'ground fault' alarm came in over the weekend on the 110V charging system. We have two 110V fans currently running and I am suspecting that one is at fault but I can't turn it off yet to fault find. I say I suspect this as we have had to change them before because of low...

I've been phoned by a customer who says his central heating pump is running almost constantly, whether his heating is on or not. (oil fired Worcester system boiler) Its not my usual area of expertise, but im thinking its possibly the motorised valve sticking and not releasing the switch that...

Hi all, I got that really weird issue with my internet router/line. I tried everything I could, replaced modem, providers everyone diagnosed the broadband line from every angle. But issue still happening, my internet goes down every few hours. But now I know the problem is somehow with my...

Hi guys, got my AM2 fault finding Resit on Monday and have a question. How would I check for reverse polarity? If I test say from the board L N or E to say a switched spur if I put one probe on the board side L then the other probe on the spur N and I get a reading, surely that means the fault...

Probably going to get slated for not knowing/doing something wrong but here goes!! So, been asked to do a board change for a customer, when I turned up they explained that had had a new PME done a few weeks ago, when I mentioned that their house wasn't earthed the customer said that the...

I came across these images on the Facebook group ECUK and thought I would share them with you guys. The sparky said that these are in his own house that he put in. Quite worrying actually as Elite are my go to make/model and I've also put them in my house.

Hi Everyone I recently had a coil pack fail highlighted by a misfire on cylinder 1. I took out the plug, turned over the engine and sure enough no spark on cylinder 1. I then checked the spark on cylinder 2 and it was perfect so i swapped the plug and lead on cylinder 1 and 2. The fault stayed...

Fault in lighting circuit, started poking about in the loft in the dark and managed to find it....:tearsofjoy:....

Hello guys, Do you do Earth fault loop impedance test for lighting circuits during periodic inspection ? do you measure it at the lighting point? what is the percentage of lights you test? Thanks alot in advance

Hi there Im reaching out here as I have given up trying and couldn't find a local electrician to help today . so the issue . after painting the wall I was try to fit the light switch back into the wall and somehow the com cable touched the metal surround on the wall. the lighting RCBO...

Can anyone help me clarify the formula in regulation 434.5.2, the time a conductor can withstand a fault current without sustaining damage. t=k2 x S2 / I2 The regulation states I is the effective fault current. Does effective fault current mean the prospective short circuit current/...

Hi guys just wanted to ask if there are any Irish electricians here that can tell me whether these examples of making off SWA are accepted in Ireland. Just had to fault find a light not working in a garden and opened up a couple of manholes to find PVC 4x4 waterproof boxes with SWA going into...

Hello guys EDF came out to a flat and attempted to replace the meter. I have been called out to investigate there comments which are “unsafe to remove meter, possible borrowed neutral, voltage at meter even with fuse removed (dropped neutral test)” First off i am currently on site, I removed...

Hello Everyone, I am from India. Things were good [seemed to be good] with temporary electric connection [single phase, 230v] to our new house. Now when we are organizing electrical wiring, dividing phases, installing ELCB, the problem started occuring. Now the electricity connection is of 3...

Was called to a commercial lighting issue on Friday where the circuit had tripped, RCBO protected. On arrival reset the RCBO and all held, three lights weren't working, two were lamps and one had a black scorched ballast, replaced this and all works. The circuit has eight lights, two PIRs a...

I work in a large public services building near my home town and it consists of wiring that was done back in the 1950's (perhaps 12/13th Edition?) when the first buildings were erected using V.I.R. cables right up to the latest 18th Edition wiring that includes "phase matched UPS/IPS" systems...

Hello, my Esser IQ8 control FACP is displaying an O/P fault 046. I have tried to see if its a zone or an address or a device. Still havent been able to rectify the fault. And what's the meaning of the O/P fault. Please anyone help. I have been on this for two dats now. All troubleshooting is not...

Please how do i start to check for system fault on panel short circuit. I was able to solve this problem before but now it's taking like forever and am getting frustrated please help. I am working on a Esser IQ 8000 control FACP.

Hello All, I never have a great deal of luck when it comes to domestic appliances! We have a Belling fan oven which when the temperature dial is turned up, immediately blows the 13amp plug fuse, trips the MCB and takes out the RCD for good measure. I was assuming U/S element so have removed...

I may be being a numpty but here goes, I had three hours today to sort this out and had to leave it disconnected in the end as had other urgent committments. Client has an outside light which is tripping RCD, this is fed via a fused switch from a rfc this circuit also feeds an adjacent fuse...

Alright folks, First time poster but im at my wits end! Got a mobile welfare unit which has a small 3kw hand wash in it. The water to the hand wash is fed from a small pump which comes on when the sensor for the hand wash is activated. There is a flying earth lead from the pump which is now...

Hi Can anyone enlighten me of what has caused this (see attachment ) ? I'm Thinking water but hoping its not so I can take the tape back

Could the better and wiser assist with an odd one...? I've just finished a big CU swap on a 1950's house that uses single core & earth lighting circuits. All but one of these are fine, but the faulty one is pretty funky; There are 3 accessories on this circuit in 3 separate rooms. The first...

Hello all, I was hoping for some advice on this ring fault I have come across. It has been intermittent for about 2 months now. It is a converted church to a children and family centre. Installation is within 10-15 years. TN-C-S supply. The fault is on a 32A type C RCBO 30ma which supplys 12...

Fault on external lighting roughly 12 lights around a building, RCBO tripping, my tester only goes to 200 Megger Ohms L-N is 0 Megger N-E is greater than 200 Megger L-E is greater than 200 Megger LN-E is 150 Megger Now tested insulation from board and roughly found the middle light with 1...

Hello all, I’m now overthinking the - Prospective fault current test for the 2391 practical, the exam boards will be a 3 phase and a single phase board. Do I test the three phase board and double the highest and use that for both DB’s or do I do one for 3 phase db1 and sep one for single phase db2

Hi guys, I haven't done much in the past with fire alarms but am starting to get more work leads with them so it is something I want to get into. Does anybody have a fire alarm zone fault checklist they wouldn't mind sharing please and what are the most common FA panel keys? By the looks of...

I have come across a fault that I am struggling to find. I cant remember being stumped like this before as I like fault finding and have always found the fault before. 6A MCB is tripping on lights. It sometimes trips the moment it is switched on and sometimes takes up to 30 mins. There is no...

Hi hope someone can give me some advice on what to do I think I'm being overcharged according to my supplier I'm using 6300 KWH a year costing me around £60 a month on electric I have no electric heaters on its all gas no electric shower all i have running is my pc 24/7 and tv on most hours...

I’ve just altered a ring main by taking 1 leg out of the board and taking it to a spur (then taking a leg back), to add a socket in. After doing so I’ve turned the board back on and everything is working as it should, other than cooker circuit (A radial feeding the cooker/hob, extractor fan and...

got a phone call from my brother at about 1.30pm to say his immersion timer had caught fire and completely melted. I thought he was exaggerating so popped round to take a look. And yep it had completely melted into a big ball of moulded black sticky plastic...:eek: This timer was fitted when he...

Hi All I have a fault on an underfloor heating mat which is as follows L-N no continuity (should be around 200 ohms) N-E short circuit L-E clear I need to find the exact location of the fault so I can take a tile up to repair it, I have thought about hiring a thermal imaging camera, just...

I work for a hotel chain and recently we’ve had our 5 yearly test they have 8 circuits from our LV panel with excessive loop impedance readings !! So apart from either introducing an rcd or dropping mcb ratings or type is there any other way of achieving satisfactory readings ?? Also if I have a...

I have just completed my 607 test and inspection exams and we are now moving onto 608 fault diagnosis, I have been searching the internet for 608 learning and exam practice but the only acceptable source I have come across is Swindon massive, however having studying from that website for 607...

Gaggenau induction hob fault - code Ci9 ADB R Today, 08:29 PM Dear All, Does anyone have any experience of the induction hob range made by the company Gaggenau? I have a customer who has the above fault being displayed and now the hob after struggling on and off for a few months has finally...

Hi All I have an issue with my shower and I suspect it's the solenoid. The original fault is that the shower either wouldn't switch on at all, or it very briefly powers on, see video I removed the front panel and as you can see below, manually pressing the plastic arm starts the water...