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Thanks Spark, John. It's good to see that there doesn't appear to be a black and white solution and that makes for an interesting conversation. I don't think that feeding the SWA by a switched fuse would change much - I think the SWA still requires an RCD for protection? I can see where...

I have recently requalified as a domestic installer as I left the industry 30 years ago, after doing an electrical apprenticeship 35 years ago. As you can imagine things have changed a lot especially with additional protection. I have the right equipment with a multi tester and also an...

Sparky, thanks for your quick reply. The reason for wanting TT is two fold. The DNO will not approve of exporting the earth and yes there is a metal frame. It is the way to achieve discrimination that I am having problems with as I know that nuisance tripping could occur. Is the fact...

I know there are many posts related to this but of the ones I have read, none of them appear to answer my questions specifically. I have a dual 30mA RCD consumer unit in the house which is on a PME supply. I would like to supply the garage from one of the MCB's. I have a small CU in the...