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Since there has been no answer of yet I will give a quick summary from an Electrical Engineer's standpoint and the method for an Electrician. Firstly, in response to post 2, you must understand that Ohm's Law (I=V/R) is strictly for calculations involving purely resistive circuits/loads. You...

Would just like to add, although I'm sure you're plenty aware, that if you touch any circuit then you will need to put it on RCBO anyway if you want to sign-off.

Hi john, A centre tapped transformer works in pretty much the same way as normal, only difference being the separation of the secondary winding to allow two separate voltages across two lines. The current flows through a process of self-inductance between two magnetic fluxes, producing a back...

It'll need to be a metal board to meet with the new amendment, so you'll have to adapt the circuit protection as necessary. I'd suggest new CU with RCBOs, as they will be doing away with domestic split load boards in the 18th.