Worst tested cable I ever found doing a EICR

[Sam cook]

Last year at night I was carrying out Electrical Inspection and Testing and Found the 300mm 4 core SWA sub main cable to a chapel was recording 0.09 ohms on carrying out high insulation resistance testing between phases. 25 thousand pounds later its rectified.

Would love to hear other people's great finds on carrying out Inspection and testing.

 

[Pete999]

Last year at night I was carrying out Electrical Inspection and Testing and Found the 300mm 4 core SWA sub main cable to a chapel was recording 0.09 ohms on carrying out high insulation resistance testing between phases. 25 thousand pounds later its rectified.

Would love to hear other people's great finds on carrying out Inspection and testing.

Hi Sam, what do you mean by "high insulation resistance testing"

 

[Sam cook]

Hi Pete carrying out a megger test, my ipad correction is a nightmare,

 

[Rpa07]

What do you mean by last year at night? Reminiscing are we Sam?

 

[westward10]

Must have blown out the protective device with a resistance of 0.09 ohms between line conductors.

 

[telectrix]

it's a chapel. they put their trust in God, not fuses.

 

[Pete999]

Hi Pete carrying out a megger test, my ipad correction is a nightmare,

Oh you mean an Insulation Resistance test with a Megger instrument, still not sure what you mean by High Insulation Resistance test though, sorry if I 'm coming across as a thickie

 

[Sam cook]

That's okay Pete yeah insulation resistance Test, I had a day of accessor correcting me telling me I could call it insulation resistance testing, he kept telling me it's high ohm resistance testing bloody bloke. The fuses were all intact and not blown, a theory I still can't understand. RPA07 I was going through my pictures of works and thought I would share if anyone else has had similar experiences. The feeder pillar was isolated and generator was delivered to site next morning.

 

[westward10]

I think you probably mean 0.09 Meg ohm.

 

[Sam cook]

Yes I do 0.09 Mega Ohms sorry for the confusion all.

 

[bigspark17]

So do you know what the damage was to the cable.? I think id have tried everything i cud before replacing it at that cost

 

[Sam cook]

Unable to inspect damage by eye but over a period of time we carried out testing at different intervals and we found damp issues. Test results were a lot better when the ground was dry. The existing cable is still underground, it passes below a listed building and war memorial garden. Nightmare! Small cost for the school. The new cable is temporary until a new building is to be built over the top of it this year. The site has 4 electricians permantley sited on site.

 

[The Ghost]

Boy that sounds like a job and half! Best IR test I did on EICR was frying the landlords tablet, I need to qualify that. I was testing the ring and told the landlord who was hovering throughout, that I have unplugged everything the mains is off (safe isolation etc.) and that I was about to inject 500v down the cable. Should have been enough of a clue? No, the landlord quietly plugged his tablet in as it needed charging, (He knew the mains was off and big volts coming down the line) I tested, strange result checked to see if I had missed something saw the Landlord attempting to charge/use his tablet. It did get fried. Worst thing (for him) was that it was his wifes. Anyhow he saw that it was stupid on his part and did not make a big thing of it, had a bit of laugh actually, until he got home! Just goes to show you can never be too careful!

 

[Sam cook]

i agree Vortigern I must admit I've been part of that stupidity when I was an apprentice. I got told to make tea for the 4 sparks I was serving, they told me to go and make tea in the other end of the school because they were doing dead testing where we were based. I was too lazy to do that, plugged into a ring main circuit in a classroom out of sight they were testing and kettle went on/off several times until it went off. The sparks were so ----ed off because it was morning tea they each gave me a dead arm and I had to walk to Tesco and buy another kettle. Bloody good sparks though!

 

[Rpa07]

It's taken me a good while to realise that you can't put the kettle on for a cuppa when you've pulled the main fuse and you're changing the board. I've done it so many times now that I started questioning whether I should be an electrician although being an electrician means drinking lots of tea so it's one of them things, you know, not an oxymoron but a . . . . . Cup of tea anyone?