13-02-2015, 05:13 PM
"Google to see that a lot of ink has been spilled on the subject. More heat than light"
Just a little...
The caravan we have is not of metal construction it's all timber but there is exposed copper plumbing inside, the main problem with an earth rod would be getting it into the ground and assuming I could would the resistance requirement (whatever that may be) be up to spec.
We live on the site of an old metal mine, 150 mm of soil at most then it's either bedrock or rocks (mine waste) I seem to remember when I dug the trenches for the septic tank soak away drains I skirted the edge of a metal mat near to the bottom of the last utility pole in the garden that carries the incomer, I think back then there was an earth wire running from the top of that pole to the bottom and disappearing under ground, since then Western Power replaced the old aluminium overhead incomer (phase & neutral) with a pair of insulated cables twisted together long weave fashion, not sure if the two cables comprising the twisted pair is phase & neutral or two separate concentric conductors each containing phase & neutral, one to our place and one to the folks next door. In the original set up it was just one pair of aluminium conductors (phase & neutral) coming from the transformer via a couple of poles across a field to the last pole in our garden, at the top of that pole it was spliced/split, one feed to our place via an insulated cable and ditto to supply next door.
Lawrence.
Just a little...
The caravan we have is not of metal construction it's all timber but there is exposed copper plumbing inside, the main problem with an earth rod would be getting it into the ground and assuming I could would the resistance requirement (whatever that may be) be up to spec.
We live on the site of an old metal mine, 150 mm of soil at most then it's either bedrock or rocks (mine waste) I seem to remember when I dug the trenches for the septic tank soak away drains I skirted the edge of a metal mat near to the bottom of the last utility pole in the garden that carries the incomer, I think back then there was an earth wire running from the top of that pole to the bottom and disappearing under ground, since then Western Power replaced the old aluminium overhead incomer (phase & neutral) with a pair of insulated cables twisted together long weave fashion, not sure if the two cables comprising the twisted pair is phase & neutral or two separate concentric conductors each containing phase & neutral, one to our place and one to the folks next door. In the original set up it was just one pair of aluminium conductors (phase & neutral) coming from the transformer via a couple of poles across a field to the last pole in our garden, at the top of that pole it was spliced/split, one feed to our place via an insulated cable and ditto to supply next door.
Lawrence.
