2core swa, not earth load end.. TT

[jaydub]

Wilko has interpreted what I was getting at lol

 

[The Ghost]

yeh but is it a circuit or just a piece of cable? Where is the loop hah!

 

[jaydub]

It would be a circuit wouldn't it, I guess it would be protected by an MCB in this scenario? I guess OP needs to clarify that

 

[Wilko]

yeh but is it a circuit or just a piece of cable? Where is the loop hah!

Well if it ain't a circuit how does current / fault current flow in it? Being creative, I'm thinking it's a >32A distribution circuit with a 5 or 1 sec disc time from 411.3.2.3 or .4 - at least it would be if I'd done it in 10mm

 

[The Ghost]

how does current / fault current flow

The MCB in the house protects the cable. The circuit in the garage is separate imho.

 

[westward10]

To the op I don't know the task you are undertaking but the EFLI or R1+R2 for the circuit from the house will be between the line conductor and armour of the cable which has been rendered inaccessible. This is the fault path for said circuit and has nothing to do with the TT arrangement. Whatever you are doing you will have to note the reading as Not Verified with the reasons.

 

[robo83]

He is trying to verify earth continuity to the armour of the cable which is not accessible as it is contained within pvc conduit to isolate it from the TT, this earth continuity is applicable to the circuit from the house and nothing to do with the TT.

Spot on.

Appoligise to everyone else for confusion.

Pete, duly noted.

The swa has been stripped back and the 2 cores run inside pvc conduit.

I did a board change after the customer had an EICR report conducted. This wasn't highlighted and only became apparent when I begun testing after the new consumer unit was installed.

 

[westward10]

Wasn't confusing at all Robo.

 

[robo83]

Thanks,

I have put LIM in the box and noted on the EIC.

They also pulled 2 strands from the other swa (another circuit) and connector blocked it and used as the cpc :/ no idea why they never glanded properly.

 

[Toneyz]

Wilko has interpreted what I was getting at lol

Exactly as Wilko said ,don't know regarding the position of the RCD however you will need loop reading /Ze +(R1+R2) to determine that the protective device for the sub-distribution circuit will operate within the maximum time for example if someone should accidently put a spade into the cable.

 

[Toneyz]

yeh but is it a circuit or just a piece of cable? Where is the loop hah!

The LINE (live) conductor SWA via the substation etc.

 

[Pete999]

To the op I don't know the task you are undertaking but the EFLI or R1+R2 for the circuit from the house will be between the line conductor and armour of the cable which has been rendered inaccessible. This is the fault path for said circuit and has nothing to do with the TT arrangement. Whatever you are doing you will have to note the reading as Not Verified with the reasons.

Will it have any reference to the choice of OCPD? cant see how as it's not being used as a cpc?

 

[The Ghost]

The LINE (live) conductor SWA via the substation etc.

Ok so you verified a piece of cable.

 

[Toneyz]

Ok so you verified a piece of cable.

Yes and I then can confirm it is safe to energise in the new consumer unit should there be a fault with the sub-distribution circuit the C.P. device will operate.

 

[The Ghost]

However the OP was asking about R1/R2 vis a vis the garage assuming I read it right I am tired and somewhat sanguine tonight.