I'm totally baffled !!??

[Torturedsole]

Hi All

New here !

So this has me stumped .

I'm currently renting my house privately and i asked permission to have smart meters installed as i currently have really old analogue ones . When the chap , who was from a subby of Scottish power , Turned up he plugged his socket tester ( cant remember the brand ) and he got the weird reading as i have gotten in the attached pictures ( the fluke one is my own , i have also tried 2 other ones ).
As you can see the red LED lights up even when the switch is off on the socket , but it isn't always present , some times its dimmer , sometimes its not there at all. For instance when i was taking these photos , at first it didn't light up , then after like 30 seconds or so it came on .
The installation has passed its inspection , i have the cert , and i asked the landlord to send someone to take a look to be sure and they said they hadn't see it before . Ive searched the net and i cant find any reason for this ??

Trouble is the subbie wont come out to fit the smart meters as they seem to think its massively dangerous ??

Any ideas ???

TIA !

 

[OnlQQker]

You wouldn't happen to have an outside light tapped into that circuit by any chance?

 

[timhoward]

It looks as though this is a report completed after some of the concerns were addressed.
According to the report and pictures the cooker is now on a B32, there is no longer an RCD enclosure, and the (presumably) two RCD's are both operating within required times, assuming the 333 was a typo and should be 33 like it's neighbours.

The main thing that jumps out now, as the OP already mentioned is the earth electrode impedance is well above what I'd be happy with, mitigated by the fact that fault protection is being provided by the RCDs.

 

[Torturedsole]

You wouldn't happen to have an outside light tapped into that circuit by any chance?

There is an outside light , which may be tapped into it

 

[goasis]

The test certificate doesn’t have a number for “points served”
How difficult is it to count light bulbs

The tester apparently didn't even know what voltage he/she was doing the IR testing at, or any mention of how they've managed to get RCD test results when there's no RCD mentioned, and presumably don't know where to find max zs values in bs7671 as they are N/A as well.

 

[Dave OCD]

And all the circuit Zs readings are waaay below Ze value ?! Were these measured with all the bonding connected ?

 

[goasis]

And all the circuit Zs readings are waaay below Ze value ?! Were these measured with all the bonding connected ?

That's to be expected though isn't it?

 

[littlespark]

The tester apparently didn't even know what voltage he/she was doing the IR testing at, or any mention of how they've managed to get RCD test results when there's no RCD mentioned, and presumably don't know where to find max zs values in bs7671 as they are N/A as well.

I had to look at that… the BS number suggests MCB, but there’s RCD trip times. Wasn’t until I noticed the times were all the same that I realised.
Must be a dual rcd board,

 

[goasis]

I had to look at that… the BS number suggests MCB, but there’s RCD trip times. Wasn’t until I noticed the times were all the same that I realised.
Must be a dual rcd board,

So why aren't they listed at the top of the certificate then? The cert is a load of crap.

I think I over worry about getting things wrong/ missing something and look back at some things I've done or not understood correctly in the past and cringe, but then you see something like this, this is just poor.

 

[timhoward]

So why aren't they listed at the top of the certificate then?

I certainly would do this for clarity, and I know what you mean, but is there an absolute requirement to list the two RCD's on their own line?
Ultimately we are listing final circuits and what is protecting each one.

 

[goasis]

I certainly would do this for clarity, and I know what you mean, but is there an absolute requirement to list the two RCD's on their own line?
Ultimately we are listing final circuits and what is protecting each one.

I was thinking the " characteristics of this db" section, "associated RCD's". Would you not use that?

 

[timhoward]

I was thinking the " characteristics of this db" section, "associated RCD's". Would you not use that?

No, as that is "Complete only if not connected directly to the origin", i.e. a sub main
Napit's certifcates could be better worded in that part.

 

[goasis]

No, as that is "Complete only if not connected directly to the origin", i.e. a sub main
Napit's certifcates could be better worded in that part.

Oh yeah, see that now. Good point.

 

[littlespark]

There’s enough lines to add in a couple of rcd’s.
That gives a chance to note their BS numbers, size etc… which could be wrong when you total the load that it’s expected to carry.
N/A or leave blank a lot of the other columns, but put “for circuits 1-5” or whatever it is.
Looks understandable when you’ve got the sheet, and the board in front of you.

Just lazy not to

 

[telectrix]

Normally, there is no voltage neutral to earth… so it’s possibly not an option on these testers.

Looks like VIR tails between cutout and meter which could do with being replaced, but that should be done if the meter is changed.

The test certificate doesn’t have a number for “points served”
How difficult is it to count light bulbs?

all depends on how deep you planted them.

 

[Deleted account]

Split board on a TT system. I hope there is an up front time delayed RCD.

@Torturedsole , any chance of photo of CU with lid up.