Spot The Mistake

[telectrix]

As title. No prizes for the first correct answer.

 

[jay sean]

no earth

 

[mogga]

yea jonny but still quote it as its NOT Ideal and NOT accessible and breaking the law to pull it

Grimmy Im hard on PIRs not every fault JUMPS out at you but if you "miss" something thats the thing that may come bite your BUM in the future

 

[Geoffsd]

One of the L sticker's is upside down - didn't see anything else wrong.:willy_nilly:

 

[grimysparks80]

Grimmy Im hard on PIRs not every fault JUMPS out at you but if you "miss" something thats the thing that may come bite your BUM in the future

Quite right mate. Rushing might save you ten minutes on the job but ittl cost you hours later on when youre putting right what you missed

 

[DNS1]

I'm a very happy newbie! Spotted the incorrect labeling before reading the rest of the thread.

Makes endless hours reading the regs seem worthwhile!

 

[malcolmsanford]

No cover on consumer unit. Disgraceful.lol
Live labelled as neutral. Earth looks too small

ive just noticed the earth bar? or lack of a decent 1. the main earth looks small too. Also the boards are missing the covers!! the live from the meter to the henley is labelled as a neutral.

As it looks like a TN-S supply why would the main earth conductor be automatically to small?

Still would change it on a CU change to a G/Y.

 

[JamesBrownLive]

As it looks like a TN-S supply why would the main earth conductor be automatically to small?

Still would change it on a CU change to a G/Y.

I thought it was a TN-C-S because of the connector that looks like its entering the SH right next to the neutral? But then I was confused because the cable then looked like it went down and was connected TN-S style??

If it is TN-S, what is the purpose of the connector on the side of the SH?

Cheers

Ok, having thought about it, I presume that if it was TN-C-S the earth would enter the SH completely, and that having a connector exposed like that would be extremely dangerous :behead:

 

[malcolmsanford]

Normally if it's PME you get a sicker, but agree that could have been removed or not put on altogether.

To me it looks a TN-S as there is a cable attached to the lead sheath, it may have been TN-S at one stage and then converted to PME and they never removed the the original TN-S link, but if it was done as a recent thing I would have thought they would have used G/Y cable.

Only person who knows for sure is the Tel

 

[Des 56]

The courses of bricks to the right of the board are out of line

 

[telectrix]

the connector on side of the head is the termination of the TN-S earth bar from the cable sheath. the "spare " cable going down is to an earth rod. found this arrangement on a few 60's installs. (belt & braces?). it's all done now. 10mm main earth ( caclulated using adiabatic ) and a nice shiny new MET. new starbreaker 13 way CU. you may be interested to know i found a new variation on the dreaded borrowed neutral. fluorescent light in garage ( one of three ) on 2 way switch, L coming from 2 way switching, N was supplied direct from CU neutral bar with a length of 1.0mm T/E with the red cut off. also, some clown had split the rfc to add sockets and left as 2 radials on a 30A 3036. this left me with needing an extra way, which i only had on the unprotected section of the new CU, so had to fork out for an RCBO, £30, customer was happy for me to add this to bill, so all cushty.

 

[Graeme Harrold]

Normally if it's PME you get a sicker, but agree that could have been removed or not put on altogether.

To me it looks a TN-S as there is a cable attached to the lead sheath, it may have been TN-S at one stage and then converted to PME and they never removed the the original TN-S link, but if it was done as a recent thing I would have thought they would have used G/Y cable.

Only person who knows for sure is the Tel

Did a supply change over only a couple of weeks ago where the permisses were on a shared supply that was subsequently split with the addition of a new incommer for the second business. I go in to have a look between the supply head being installed and the metering being fitted to find a bare piece of copper going from the PME block out to a plastic enclosed MET. I duly leave a nice length of 16mm earth cable and a note for it to be fitted. Return 2 weeks later to find the copper wrapped in tape and my note scribbled with "not my job mate"...........

 

[JamesBrownLive]

Normally if it's PME you get a sicker, but agree that could have been removed or not put on altogether.

To me it looks a TN-S as there is a cable attached to the lead sheath, it may have been TN-S at one stage and then converted to PME and they never removed the the original TN-S link, but if it was done as a recent thing I would have thought they would have used G/Y cable.

Only person who knows for sure is the Tel

But would a TN-C-S arrangement like that be acceptable? I just assumed that because N is considered a live conductor, that it would not be acceptable or safe to have a connection like that that could be touched?

Cheers

 

[telectrix]

it's not TNC-S. the connector block is just sat there, not connected to N.

 

[malcolmsanford]

But would a TN-C-S arrangement like that be acceptable? I just assumed that because N is considered a live conductor, that it would not be acceptable or safe to have a connection like that that could be touched?

Cheers

Remember the link for the NEUTRAL/EARTH connection is 99% of the time in a TNC-S system done in the head, and often you will get in older heads just as above an extended earth bar open just like that. Like attached

View attachment Lucy HRC Insulated House Service Cutouts.pdf

 

[telectrix]

yep, similar but not as ancient. i think that around the early 70's heads were supplied with the block attached in readiness for PME, but no link across to the neutral in the head. the way to be certain is to measure the pssc and pefc. if the readings are identical, then its TNC-S. if the pefc is lower than the pssc, then it's TN-S.