In a TN-C-S system the C.P.C.s of the final circuits connect to the earth bar in the consumer unit. The white R.C.B.O. leads connect to the earth bar. Neutral and earth are connected together at the cut-out. If the neutral is lost so is the earth connection (P.E.N. broken).
In a TN-C-S system the C.P.C.s of the final circuits connect to the earth bar in the consumer unit. The white R.C.B.O. leads connect to the earth bar. Neutral and earth are connected together at the cut-out. If the neutral is lost so is the earth connection (P.E.N. broken).