TN-C-S earth bonding

[harveysmith]

Securespark

(Sent my son to get on with the photos.)


The truth is Securespark ... you don't!

More to the point, the lecky company don't either. No company employee has actually read my meter in the 18 years I've been here. They turn up, take one look and rely on me reading it standing on the bannister and leaping across to the adjacent window. Only a few months ago someone arrived to change the meter. He came with a small step ladder as he had been forewarned (by the bloke who'd come before him I assume). The ladders were hopelessly too short so he left, saying he'd be back.

The cost of moving this meter etc terrifies me so I'll keep quiet until powergen prompt UU after I stop being so helpful with the meter readings.
Anyway I'm not getting any younger!

Do you think I could manoeuvre them into doing their bit of the work for free?


The fact of the matter is that browsing through this forum has told me that all my electrics need professional help!

Mike G

 

[Paul Barker]

In lieu of a picture with tncs the green and yellow disapears inside the cutout (whein, though you can't see it, they splice it to the neutral), with tns it is bared back and connected visibly to the outer sheeth of the supply cable, be that lead or wire.

Broken neutral between you and one of the multiple earth points along the line could leave your house floating between 0v and 230v so an earth spike would be like a guy teather on a hot air balloon, keeping it firmly grounded.

That doesn't sound like a bad idea, how often do overhead lines get lampooned by gales and light aircraft? Often enough. You have overhead lines bringing your teather. You can't rely on the other incoming services to teather you to ground. nobody can.

 

[plugwash]

In lieu of a picture with tncs the green and yellow disapears inside the cutout (whein, though you can't see it, they splice it to the neutral), with tns it is bared back and connected visibly to the outer sheeth of the supply cable, be that lead or wire.

I've seen picures TN-S cutouts where all the wiring was hidden.

Unless you can see either a join to the cable sheath or a join from neutral to earth the only way to find out is to compare the P-N and P-E loop impedances.

 

[Paul Barker]

Thanks