A copy of a PIR given to me by a new customer. The installation is TNCS, the Ze on the report is 0.56ohm (I measured it and got 0.06ohm) Look at the cpc sizes for the t&e cables! The PIR was done by a registered company/electrician.
PIR Report
- Thread starter vera121
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Oh good greif 
I'm loving the phrase "electronics", which we all know means "I'm either too lazy or too incompetent to test the circuit properly"
No R1+R2 for the ring final, and no 5xI∆n on the RCD.
500MΩ seems a very precise figure for every circuit to be at.
Can you post us the rest of the certificate to have a laugh at?
(Obviously obscure the customers and contractors details)
I'm loving the phrase "electronics", which we all know means "I'm either too lazy or too incompetent to test the circuit properly"
No R1+R2 for the ring final, and no 5xI∆n on the RCD.
500MΩ seems a very precise figure for every circuit to be at.
Can you post us the rest of the certificate to have a laugh at?
(Obviously obscure the customers and contractors details)
Who asked you anyway?
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lazy<=>incompetent
In my book.
Those IR readings are clearly made up. From all the meters i've used it would either be >299 or >999 so he doesn't mean that!!!!
I WANT to know who the company is, they should not be getting away with it
In my book.
Those IR readings are clearly made up. From all the meters i've used it would either be >299 or >999 so he doesn't mean that!!!!
I WANT to know who the company is, they should not be getting away with it
More details,
The DB was 100ma RCD main switch type, (no 30ma for sockets etc) the report was marked 'Satisfactory' don't know why they didn't do the R1+R2 measurement?
The DB was 100ma RCD main switch type, (no 30ma for sockets etc) the report was marked 'Satisfactory' don't know why they didn't do the R1+R2 measurement?
The measurements for the cooker circuit are suspect - 0.06 for R1R2, yet measured Zs is 0.51 - far more than most of the other circuits?.
'Lts' (Lights presumably) apparently have 'electronics' yet smoke detectors do not? Even if they did, there should be no problem measuring L-E and N-E.
Were BS3871 breakers ever manufactured in 6, 16 and 32A sizes? 5, 15 and 30A is more likely - probably the Wylex press button types?
'Lts' (Lights presumably) apparently have 'electronics' yet smoke detectors do not? Even if they did, there should be no problem measuring L-E and N-E.
Were BS3871 breakers ever manufactured in 6, 16 and 32A sizes? 5, 15 and 30A is more likely - probably the Wylex press button types?
What did he put down as observations and recommendations?
No sufficent RCD protection on sockets, depending where they are can be a code 1 or 2.
If they were OK under the 16th edn tho a code 4 might be more suitable.
No sufficent RCD protection on sockets, depending where they are can be a code 1 or 2.
If they were OK under the 16th edn tho a code 4 might be more suitable.
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I do often wonder where companies insist on us entering details which we are not really able to know.
If we look at a modern 6242Y cable then 1mm has 1mm ECC and 6mm has 2.5mm ECC but one can't really know those sizes without measuring in some way and times given for a PIR are to tight to remove every cable to measure.
Also how can one tell between 6242Y and 6242B maybe it is written on sheath but can one see the sheath?
To enter these details on the installation certificate is good. But in most cases with a PIR we do not know the details and to look at some of the old 2.5mm cables or imperial equivalent it is very easy to mix it up with 4mm cable. Or vice versa as has happened many times where someone extends what they think is a ring main but is a 4mm radial.
So I have long questioned the entering of values which one knows the likely hood is we will guess.
And like you have had some one gives you a report which you rely on. So do you remove and measure the ECC or do you guess?
I would normally enter the sizes from old certificate and would hope these had been found in a likewise manor back to original insulation cert. And where it asks how I can tick inquiry.
So is it out with the micrometer?
If we look at a modern 6242Y cable then 1mm has 1mm ECC and 6mm has 2.5mm ECC but one can't really know those sizes without measuring in some way and times given for a PIR are to tight to remove every cable to measure.
Also how can one tell between 6242Y and 6242B maybe it is written on sheath but can one see the sheath?
To enter these details on the installation certificate is good. But in most cases with a PIR we do not know the details and to look at some of the old 2.5mm cables or imperial equivalent it is very easy to mix it up with 4mm cable. Or vice versa as has happened many times where someone extends what they think is a ring main but is a 4mm radial.
So I have long questioned the entering of values which one knows the likely hood is we will guess.
And like you have had some one gives you a report which you rely on. So do you remove and measure the ECC or do you guess?
I would normally enter the sizes from old certificate and would hope these had been found in a likewise manor back to original insulation cert. And where it asks how I can tick inquiry.
So is it out with the micrometer?
how is it that the light circuit has no Ze?
Zs-(R1+R2)=Ze?
0.49-0.49=0
the Ze doesn't appear to be constant either..
Ze1 = 0.45
Ze2 = ( can't be arsed to do the math )
Ze3 = 0.20
Ze4 = 0.48
Ze5 = 0.00?
Zs-(R1+R2)=Ze?
0.49-0.49=0
the Ze doesn't appear to be constant either..
Ze1 = 0.45
Ze2 = ( can't be arsed to do the math )
Ze3 = 0.20
Ze4 = 0.48
Ze5 = 0.00?
yet you can work out Zs by ADDING R1+R2 to Ze..
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There is no 5x for the RCD as it is not required.
I would say the installation is no more than 20years old. Basicly its a poor PIR. There were no recomendations or comments on the PIR.
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