Electrical Test sheets & Fudged Figures

[Ian1981]

Full electrical Installation report.

ThenR1+R2 values are required to be measured only.
Zs can be measured by a live test but I would expect the results to be that of a lower value than the calculated method of zs=ze+R1+R2

 

[Beyond Espresso]

I'm going for a lie down in a dark room

I'm asking - do you think its fudged? Without me having to spend to send another body down to the job and get them to retest. Can anyone see ANYTHING suss about the test sheet I've just uploaded?

I am not an electrician in any shape of form, However I do check figures against what the lads send me on the low and what gets printed on a test sheet. Because I am certain both the CM/QS are pulling the wool over the company.

At the end of the day, I'm there to protect the company and the lads on site, So if I don't check these things then i'm as bad as they are.

 

[Pete999]

I'm asking - do you think its fudged? Without me having to spend to send another body down to the job and get them to retest. Can anyone see ANYTHING suss about the test sheet I've just uploaded?

I am not an electrician in any shape of form, However I do check figures against what the lads send me on the low and what gets printed on a test sheet. Because I am certain both the CM/QS are pulling the wool over the company.

At the end of the day, I'm there to protect the company and the lads on site, So if I don't check these things then i'm as bad as they are.

Sorry Mate "you are not an Electrician" how do you know what you are checking is correct?

 

[The Ghost]

RCD test result times

those RCBO are very twitchy I often get figures like that but more like 22 @ 5 x. I think its very hard to believe that dado sockets (cct 8 and other rings) upstairs have an R1/R2 of 0.11 must be a circa 10m cct I would have thought more like 30m total giving approx 0.48. What distance does the circuit go to? And thinking about it what you said about the Zs = Ze + R1/R2 is so spot on in every case it looks like its calculated. They could have faked it better by varying the figures.

 

[westward10]

The only thing which I doubt is correct is the line/neutral insulation resistance readings which are rarely achievable on an EICR. As for similar rcbo trip times that isn't impossible they are similar, very often Memshield 2 devices will give 39/29 all the time, yesterday I had four in a Wylex NHX all identical. The R1+R2 for the ring finals are incorrect and the Zs for these circuits don't tally with the continuity readings.

 

[Beyond Espresso]

Sorry Mate "you are not an Electrician" how do you know what you are checking is correct?

Hence me asking for help on this forum. If someone could look at the test sheet I uploaded. Tell me, do you see anything suss.
I sent this to the independent person I use, and he noticed straight away. I had my suspicions when I received it, because the original figures were MISSING.
QS/CM said the electrician did it online, The electrician said he didn't because it crashed mid way, so did a blank handwritten TS for us, and the CM/QS lost it.

 

[SparkyChick]

I'm not disputing they could be valid results, but last week I installed two RCBOs, brand new, identical in every way... operation times were wildly different... all within required times, but radically different. Those on that test sheet look too similar across that many devices.

Edit:-

And having just read Westward's post, I'm happy to bow to you guys who are more experienced with these matters. I've not had much to do with RCBOs in all honesty, they just look too similar.

 

[Deleted member 26818]

There's a few things that don't add up.
System is TN-S, yet the Ze is is more applicable for TN-C-S.
Test button for RCD on circuit 12 has been operated?
RCD test times don't look right.
I would expect a quicker time on 5x test than on 1x, yet they are either the same or slower?
Nominal voltage is 400V for single phase?

 

[Beyond Espresso]

The R1+R2 for the ringame finals are incorrect and the Zs for these circuits don't tally with the continuity readings

That's all I wanted to know - Thank you. This is the answer I needed.

 

[westward10]

As an approximation the Zs for circuit 8 should be about 0.41, circuit 15, 0.42 and circuit 16, 0.43 however the values of end to end continuity look incorrect for the size of conductors unless the cpcs have been incorrectly sized and should be 1.5 as opposed to 2.5.

 

[Wilko]

... however the values of end to end continuity look incorrect for the size of conductors unless the cpcs have been incorrectly sized and should be 1.5 as opposed to 2.5.

I think they may have written down it was 4mm / 2.5mm but like you I'm thinking the numbers are closer to 4/1.5 which of course is a standard cable size.
Having read it a few times while consuming this evening's anesthetic IMHO the report is best redone as it has some inconsistencies.

 

[Ian1981]

The only thing which I doubt is correct is the line/neutral insulation resistance readings which are rarely achievable on an EICR. As for similar rcbo trip times that isn't impossible they are similar, very often Memshield 2 devices will give 39/29 all the time, yesterday I had four in a Wylex NHX all identical. The R1+R2 for the ring finals are incorrect and the Zs for these circuits don't tally with the continuity readings.

Schneider ikq range rcbo s are practically the same when testing the most common ratings 32 amp.
Also the 16amp and 6amp.

 

[Ian1981]

I think they may have written down it was 4mm / 2.5mm but like you I'm thinking the numbers are closer to 4/1.5 which of course is a standard cable size.
Having read it a few times while consuming this evening's anesthetic IMHO the report is best redone as it has some inconsistencies.

It's surprising how many people think that 4mm twin comes with a 2.5mm cpc.
It's even written on the drum and most of the time the cable 2x 4.0mm 1x 1.5

 

[westward10]

It's surprising how many people think that 4mm twin comes with a 2.5mm cpc.
It's even written on the drum and most of the time the cable 2x 4.0mm 1x 1.5

Not so sure according to the schedule it is T&E as it is referenced as singles in conduit but who knows if that is correct.

 

[Ian1981]

Not so sure according to the schedule it is T&E as it is referenced as singles in conduit but who knows if that is correct.

I can't see the cert as I'm on my phone.
Won't upload so I can't comment on any results