TN-CS or TNS?

[wcampbell]

Hi all.

Can someone tell me what kind of E system this is?

I think its TNCS but the 6mm to E Sleeve is confusing me.

I think the MET is connected to the N - hence TNCS.

Should I upgrade 6mm E.

Thanks for your replies.

 

[GLENNSPARK]

yep....looks like a pme to me......16mm earth here mate...check the bonding n all.....what type of c/u is it...?...RCDd?

 

[telectrix]

it's a bloody bodge up, that.s what it is. what's that 6mm? doing coming from the meter?

 

[GLENNSPARK]

noticed that tel.....looks like its "jointed" onto some neutral or summat.....

 

[telectrix]

shower cable, not a spare way in the board?

 

[Edd]

what a freaking mess,,would say pop the fuz out and loosen the cover off, but being an open forum that would be wrong..

 

[i=p/u]

yes wata messssssssssss even to my standards

 

[mickys86]

At least it's in right side of the meter

 

[telectrix]

and adequately protected by a 100A? fuse.........

 

[Edd]

Should I upgrade 6mm E.

Thanks for your replies.

I think you need to upgrade the whole CU area.. its time for whoever owns the mess to pay up..

 

[i=p/u]

could be a fuse within 3m

 

[wcampbell]

It's my house and the 12mm T&E runs to a new DB in extension.

I did n't run this cable but did design and erect all circuits to secondary DB in extension and hooked up everything into Sub Main DB.

This is one of two installs for my NIC assessment ( novice ).

Once I found the problem I fitted 63a RCD as isolator in main DB with Henley Block.

Problem now is that 6mm E.

PFC at secondary DB is 700a. 100a Isolator at secondary DB.

700a x 5s / 115 = 13.5mm = 16mm needed.

Assessment on Monday so I'm stuffed.

 

[Knobhead]

Cut that 6mm and hide it, mind you there’s no seal on the meter so disconnect.

You put this forward for an assessment?

It’s time for a trip to B&Q very early Sunday AM and some very fast work to make it presentable. Pull your finger out and the situation is recoverable, just! Even if you have work very late.

Out of interest, who did put that 6mm in?

 

[Engineer54]

I'm not being funny here, but are you really ready to be assessed and to go out doing work in peoples property?? The mistakes you've made are really very basic, and I've never seen or heard of 12mm T&E...

 

[Knobhead]

Once I found the problem I fitted 63a RCD as isolator in main DB with Henley Block.

Problem now is that 6mm E.

Just reread this bit of your post, there’s no RCD on the sub board? Scrap the quick fix, there’s to much to do!

This is your house?

 

[SPARTYKUS]

That piece of cable as Telectrix points out, be it 4, 6 or 10mm, IS the fuse. Its protective device is the suppliers fuse which will only pop with a large current flowing, well after that piece of cable has melted/caught fire.

Hard to know what else to say really its been suggested already, maybe get someone in to do it and watch.

Saying that, it might be a 60A fuse but its still a demonic mess

 

[telectrix]

700a x 5s / 115 = 13.5mm = 16mm needed.


​if that's supposed to be an example of the adiabatic equation, then i suggest you do some reading.

 

[wcampbell]

Thanks for all the replies.

I let a Sparky with some forty years experience connect Sub Main Cable at the origin of the circuit ( although he did send someone else to do it ).

My experience may be low but I'm learning at a great rate of Knots.

On Friday I isolated Sub Main at origin with 63a Rcd. The RCBO in extension DB has 100a Isolator.

The Line Conductor cable has a CSA of 6mm so that's 12mmsq.

The time/current graphs in Regs say 100a RCBO = 500amps.

500x5/115 = 9.72.

Going to run 10mmsq from extension DB to MET at origin of the circuit.

I never gave a thought to the work done at origin, why would I - it's been done by a qualified Spark!

 

[Guest111]

as previous poster said, are you sure your ready to be assessed? not having a go like but anyone with any elec experience would see that the wiring on that meter is a lash up,do yourself a favour mate seriously get more experience,how are you gonna do the job if you don,t know when something isn,t done right?

 

[malcolmsanford]

Thanks for all the replies.

I let a Sparky with some forty years experience connect Sub Main Cable at the origin of the circuit ( although he did send someone else to do it ).

My experience may be low but I'm learning at a great rate of Knots.

On Friday I isolated Sub Main at origin with 63a Rcd. The RCBO in extension DB has 100a Isolator.

The Line Conductor cable has a CSA of 6mm so that's 12mmsq.

The time/current graphs in Regs say 100a RCBO = 500amps.

500x5/115 = 9.72.

Going to run 10mmsq from extension DB to MET at origin of the circuit.

I never gave a thought to the work done at origin, why would I - it's been done by a qualified Spark!

Son I do really try to help people on here, and I'm all for people learning .......but to be honest your clueless and you are a danger to yourself, and to anyone else you decide to do electrical work for.

Please do not take that assessment, I don't know what training you had or if your still in training or whatever, but please rethink you do not have the skills or training to be assessed and then take work on in peoples home.

Blunt, yes it can be, but I'm worried for your and others safety