My house supply is TN-C-S but also has an earth rod. It's a dedicated supply that runs overhead for some distance before diving underground to get into the house. An earth rod with PME seems to be controversial but I can't see any downside for an isolated property. Have I missed anything?
TN-C-S with additional earth rod
Sep 30, 2017
4 Replies
You are already 18th edition ready.
The outside connection to the earth rod should be mechanically protected and insulated from being touched. It should have decent size of wire connecting it directly ot the main earth terminal by the incoming main fuse. There shouldn't be any additional connections to it except via the house wiring. Then I can't see what harm it could do (others might!) but don't rely on it to alter the characteristics of the TN-C-S installation.
No not really. The earth rod simply becomes another of the "multiple" earthing points along the run of the combined neutral and earth conductor.
Thanks all.
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