The flat is on the ground floor and therefore the main MCB on the CU is an RCD. When doing the Zs for all the circuits I use the RCD setting on the EFLI setting on my Alphatek. This works fine for the ring and the cooker final circuits ie no RCD tripping. However it does trip on the lighting circuit test. Should I use the calculated Zs for the Schedule Of Test Result form and state this somewhere on the form? (measured Ze plus R1+R2).