Using twin & earth for sub board

[Octopus]

So are you doing the 2391 with little practical experience?

 

[JakeC]

I've got experience of installing but didn't have any experience of testing or calculations etc before I started. Brought a Fluke tester, gn3 and just ran through the tests on my home install. Don't get me wrong I spent many nights going through it all maybe why I found the test ok.