1mm attached to a 20A circuit

[vitoboy]

Yes .. my thoughts exactly..there has been a new boiler and heating system fitted ..but previously there was no heating system and just a immersion for hot water .
Maybe in the distant past (1960s building) there was a back boiler and this a stat wire .. but no trace of any of this within existing fittings now .. maybe a wiring center buried in the fabric of the building somewhere.. but no trace of this we could fine .. we were there for 6 hours for this eicr .. electrician and mate .. we gave it a good going over.
The building is a 1960s ex council built looks like concrete slab ground floor with timber upstairs .. we are working on the ground floor only as its a 2 bed flat with another 2 bed flat upstairs... both are now privately owned.
So this is why I'm asking your opinions.. its potentially major work to find where this 1mm is joined to this 20A radial circuit.. is it a c2 .. or a c3 .??
I do a lot of EICRs.. we don't rush them .. but this is a new one for me.

Ps ..Smokes wired from the lighting circuit

 

[HappyHippyDad]

Unsatisfactory report due to FI required.
I couldn't really understand most of the OP's posts though, so could well be a C2.
Could be anything actually due to lack of coherent info.

 

[timhoward]

To be fair to the OP this is a rather unusual situation.

My opinion based on what we know-
FI? Well the only thing we don't know is where it connects, and OP has done his best to determine there are no accessories downstream of the joint.
C1? No one is one single action away from danger
C2? As it's left the cable can't be used by an ordinary person, so hard to say that it's potentially dangerous.
C3? We'd definitely recommend improvement. Ideally if redecoration ever permits it the joint would be found and dealt with.

I think I'd C3 it.
(I might stick an FCU with 5A fuse on the end of it with a 5A Max label, then I'd feel that I'd done all I can to prevent anyone overloading the cable in future. )

 

[pc1966]

C3 would seem most appropriate (as 1mm can clear 20A MCB adiabatic under fault conditions), but it is clearly an odd situation to be still live from the far end without any obvious connection point.

 

[vitoboy]

To be fair to the OP this is a rather unusual situation.

My opinion based on what we know-
FI? Well the only thing we don't know is where it connects, and OP has done his best to determine there are no accessories downstream of the joint.
C1? No one is one single action away from danger
C2? As it's left the cable can't be used by an ordinary person, so hard to say that it's potentially dangerous.
C3? We'd definitely recommend improvement. Ideally if redecoration ever permits it the joint would be found and dealt with.

I think I'd C3 it.
(I might stick an FCU with 5A fuse on the end of it with a 5A Max label, then I'd feel that I'd done all I can to prevent anyone overloading the cable in future. )

Thank you Tim.. this was my feeling.

 

[vitoboy]

As an upshot of the other relpys that were unhelpful..
Can I ask how you would have described the situation I'm trying to get assistance with .. ?
I think we can agree it's not a straightforward situation.. and hard to describe without a huge essay.

Thanks again to everyone who persevered to an answer.

 

[Rockingit]

To the OP - I'm assuming that you've done the obvious thing and turned off all the other MCB's in sequence to find which is feeding this errant circuit? And, as daft as this sounds, if it's powered from this same MCB could someone have DIY'd the turning of a radial into an RFC? Only you know what you're looking at.

 

[vitoboy]

To the OP - I'm assuming that you've done the obvious thing and turned off all the other MCB's in sequence to find which is feeding this errant circuit? And, as daft as this sounds, if it's powered from this same MCB could someone have DIY'd the turning of a radial into an RFC? Only you know what you're looking at.

Yep .. only connected to that 1 20A radial .. no continuity to anything else.

 

[westward10]

When it comes to explaining what you have I often quote say what you see. The amount of reports I have QSd and had to ring the person asking what they mean and when explained I ask why didn't you write that.
From what I can make out you have a 20A device with both 2.5 and 1.0 cables connected, it isn't clear what the 1.0 does but becomes live when disconnected and the circuit energised. Is this correct?

 

[vitoboy]

When it comes to explaining what you have I often quote say what you see. The amount of reports I have QSd and had to ring the person asking what they mean and when explained I ask why didn't you write that.
From what I can make out you have a 20A device with both 2.5 and 1.0 cables connected, it isn't clear what the 1.0 does but becomes live when disconnected and the circuit energised. Is this correct?

Yep