P
phawk
Could anybody help me with this?
I'm starting a re-wire of an old property that has an overhead incoming supply. I've pulled the main fuse and there is a live & neutral supply, then the earth is taken from the neutral block (TN-C-S, right?). The problem I have is that I spoke to another electrician who seems to think that this shouldn't be the case if the supply is coming from overhead, as the system would need an earth rod, making it a TT system.
I've done a Ze which comes in at 0.20 ohms, and a PFC & PSCC which both come in at 1.17kA, which are well within the limits for a TN-C-S system.
So.......is the system earthed or not? Seems to me that it is but I want to make sure.
Also, the property has no gas (it has a stand-alone oil supply for the central heating). Where do I bond this?
Thanks a lot,
Paul
I'm starting a re-wire of an old property that has an overhead incoming supply. I've pulled the main fuse and there is a live & neutral supply, then the earth is taken from the neutral block (TN-C-S, right?). The problem I have is that I spoke to another electrician who seems to think that this shouldn't be the case if the supply is coming from overhead, as the system would need an earth rod, making it a TT system.
I've done a Ze which comes in at 0.20 ohms, and a PFC & PSCC which both come in at 1.17kA, which are well within the limits for a TN-C-S system.
So.......is the system earthed or not? Seems to me that it is but I want to make sure.
Also, the property has no gas (it has a stand-alone oil supply for the central heating). Where do I bond this?
Thanks a lot,
Paul