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Why would it require rcd protection.Run swa to the lamp post (volt drop calculations) bonded on a 30MA rcd in the consumer unit job done!
Discuss Metal lamppost in garden... TNC-S in the UK Electrical Forum area at ElectriciansForums.net
Why would it require rcd protection.Run swa to the lamp post (volt drop calculations) bonded on a 30MA rcd in the consumer unit job done!
This was suggested many years ago by the ILE but was felt the column would be unreliable as an electrode due to corrosion, protection on the column to prevent corrosion and the means of bedding it in the ground.The post will propably act as one big rod.
It doesn't need RCD but it wouldn't hurt to have it.Why would it require rcd protection.
Yeah this one is pretty rusty!This was suggested many years ago by the ILE but was felt the column would be unreliable as an electrode due to corrosion, protection on the column to prevent corrosion and the means of bedding it in the ground.
Thanks Richard, this makes sense.This is probably a case of minimal risk. In general you are not constantly handling a lamppost, as opposed to hand held electrical equipment, and so the risk of neutral loss fault occurring and it being a risk due to contact are low.
Bonding will have limited effect since the potential you are trying to eliminate is between earth and the supply and bonding will only limit the PD between the MET and the supply.
Within a property there should be no potential differences because the bonding connects all sources of potential difference together. Outside a property without installing conductive mats in the ground you cannot avoid being in the presence of a nominal 0V from true earth and so the risk is increased.
Reply to Metal lamppost in garden... TNC-S in the UK Electrical Forum area at ElectriciansForums.net
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