Earthing Arrangements Explained + Photo's

[shanky887614]

Ah so when a lot of people install earth rods they are potentially increasing the chance of nuisance tripping

 

[Knobhead]

Ah so when a lot of people install earth rods they are potentially increasing the chance of nuisance tripping

Only if they link N→E. Which as we all know they shouldn't.

 

[Silly Sausage]

Ta Tony, I'll have to get back later on this one.
I need a clear head!

 

[Knobhead]

This is a thread from many moons back. Imported N→E fault.

http://www.electriciansforums.co.uk...eral-electrical-forum/21227-tingley-taps.html

 

[GLENNSPARK]

and i`ll say this as well Tony..

one of the neighbours up until recently had issues with extranious in his house with voltage sitting on it..

then he said one day the DNO came out and were doing something...
ever since then the extranious in his house has been clear....

hmm.....

 

[Knobhead]

The DNO’s also have another crafty trick with MV OH earthing. You may have seen section switches on OH lines. If you look there will be an earth running from the switch metalwork to the ground. It isn’t a rod, there will be a mat.
The idea is that the ground the operator is standing on is at the same potential as the switch metalwork. Where it gets tricky is approaching the switch, I was taught “the shuffle”. You don’t go striding up to the switch as there could be a ground voltage gradient, you shuffle towards it not putting one foot fully in front of the other.

PS I don’t like MV OH lines.

 

[DPG]

Cows are more sensitive to the gradient effect because of the distance between their legs (this applies to some TV 'celebrities' as well). Luckily most cows don't need to operate MV switchgear - they normally stick the the LV stuff. Daz

 

[Hohmage]

PS I don’t like MV OH lines.[/QUOTE]

Oh boy, this is all filling me with confidence, not! So, as a poor soul who has to live with an overhead supply, is there anything I can do/have done to make it safer? Apart from avoid crawling about on all fours! The DNO is clearly not concerned until some poor sod discovers a fault!

 

[Knobhead]

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.

 

[Knobhead]

Oh boy, this is all filling me with confidence, not! So, as a poor soul who has to live with an overhead supply, is there anything I can do/have done to make it safer? Apart from avoid crawling about on all fours! The DNO is clearly not concerned until some poor sod discovers a fault!

If you know there's a fault, supplies gone off etc. Don't go nosing around the MV gear, simple as. If you're that woried, talk to the DNO. If you're on a farm then it's worth a phone call.

Remember I’m talking of fault conditions, not the everyday life of country folk.