I have never filled in an Electrical Installation Cert before and just wanted to clarify a couple of things. The new installation is a supply for a 3Ph machine. The supply for the machine is from a DB which is fed from a Section Board which in turn is fed from a Main Section Board1:Is the Main Section Board where I will take my Ze and Pfc readings2: Main Switch / Switch Fuse /Circuit Breaker / RCD - is that details from main switch of Main Section Board, Section Board or DBThanks