Earthing TNCS grid UK and load connection
For a UK TNCS earthing grid connection.
2 things I want to understand.
1. Does that mean the earth in the house just connects to the grid neutral in my meter box, and that's it?
So it's used to allow rcd's to trip, but then where is it connected to earth?
2. Does that mean we can just put a permanent Erth neutral bond on the load output, if its only going to be used when the grids off.
Ie the inverter is then the same setup as the grid earth neutral in my meter box.
78 Views
If you are interested in understanding this sort of issue from a "why is it like this?" perspective rather than just from a "what are the rules?" perspective, then I recommend these two papers: "http://rsgb.org/main/files/2019/12/EMC07-v4-Earthing-and-the-Radio-Amateur-Basic.pdf" and "http://rsgb.org/main/files/2019/12/UK-Earthing-Systems-And-RF-Earthing_Rev1.4.pdf". They explain, among other things, why you might need local earthing when the grid goes away but also why it is not a good idea to just add local earths all of the time. Without this background the rules seem arbitrary but, for me, when I read these I went "aha!".