Earthing Arrangements Explained + Photo's

[Hohmage]

The advantage of having sheep and cattle in the field is you know there’s a ground voltage gradient around the switch. Dead sheep and cows tend to give it away.

Okay, thank you Tony. I usually do my best to keep the sheep out, but will now go and tear holes in the fence.

 

[GLENNSPARK]

The advantage of having sheep and cattle in the field is you know there’s a ground voltage gradient around the switch. Dead sheep and cows tend to give it away.

yes Tony...

 

[zap]

Can anyone identify which type of supply this is please?
It looks like 16mm2 twin and bare earth.

 

[topquark]

Nope, not from that pic, but I'd hazard a guess that's a submain with EMT, the question is where from.

 

[zap]

I think it's a 60's build council semi near Poole, Dorset. It's no longer council though.
I'm not sure how to proceed. I suppose a call to the dno should be the next step.

 

[topquark]

Where is the service fuse? Is this flats (possibly three phase with a phase/flat etc). That doesn't look like the main head to me.

 

[zap]

It's a semi-detached house with a pre-paid meter and cut out within the same enclosure (I think!).
The property is some distance from me so I'll ask the client (a friend) for another picture showing the content of the enclosure and when I get it I'll post it here.

 

[zap]

Deleted... only I haven't worked out how to delete the photos! Help!!

 

[zap]

Where is the service fuse? Is this flats (possibly three phase with a phase/flat etc). That doesn't look like the main head to me.

Sorry for the delay, 415V ???

View attachment 22379View attachment 22380View attachment 22381

 

[Engineer54]

The incoming cable looks like a split concentric and so will be TN-S. I assume that the G/Y earth cable is the main earth to the remote CU. If in doubt test for TNC-S!!

 

[zap]

The incoming cable looks like a split concentric and so will be TN-S. I assume that the G/Y earth cable is the main earth to the remote CU. If in doubt test for TNC-S!!

Thanks Eng. Yep, G/Y is the main earthing conductor. I'm sure determining the pfc will reveal.

 

[DPG]

Why do you say 415V ? Daz

 

[zap]

Why do you say 415V ? Daz

the information on the cut out (pic 3) says:

series 7 415V BS1361 100A type IIb

 

[DPG]

Though it might be that. Don't assume it's 415V because it says it on the side. In a similar way, don't assume it's a 100 amp fuse because it says 100A on the fuse carrier. Daz

 

[zap]

Why do you say 415V ? Daz

post #129 3rd image

 

[zap]

Though it might be that. Don't assume it's 415V because it says it on the side. In a similar way, don't assume it's a 100 amp fuse because it says 100A on the fuse carrier. Daz

Yeh, sorry, my system went a bit lala for a few minutes. I don't assume anything. Assumptions bite! But point taken...

 

[Engineer54]

That's the BS fuse voltage rating.... lol!!

 

[zap]

Though it might be that. Don't assume it's 415V because it says it on the side. In a similar way, don't assume it's a 100 amp fuse because it says 100A on the fuse carrier. Daz

Right you are, not to assume.
After obtaining some temporary seals from the DNO I looked inside the carrier and this is what I found.

Brush
30 Amp
60 LR
Certified
440V AC 4
BS88 - 1952
Class 3
Made in England

The print on the fuse had faded so there may be errors in the above info.

The DNO were contacted again and they're sending an engineer to address the issue.

 

[Engineer54]

Just shows you how long that service fuse has been in place. My parents house only had a 40A service fuse and a 40A meter for donkeys years. Then got updated out of the blue to 60A fuse and 100A meter. Later still, Mechanical meter replaced with digital meter and fuse/tails uprated to 80A/16mm....

 

[Silly Sausage]

Brush
30 Amp
60 LR
Certified
440V AC 4
BS88 - 1952
Class 3
Made in England

Non of your Chinese rubbish!