I have writer's block today, but I will ask a question based upon a recent installation that I saw.
You visit a 1950s bungalow. You notice an original wooden cased four way fuse box with porcelain fuse wire holders, all in good dry condition. The final circuits are 30Amp cooker, 30 Amp sockets, and two 5 Amp lighting circuits. The fuse box is supplied by what look to be single insulated, or quite small compared to moderns standards, red and black tails from a Voltage operated earth leakage circuit breaker. The black cable V.O.E.L.C.B. connection to the original earth rod has been disconnected. The test button of the V.O.E.L.C.B. does not cause the unit to trip off. The cooker panel has a 13 Amp socket mounted in it. Zs at the cooker panel is 0.25 Ohms. The supply is P.M.E. All cables are P.V.C. insulated.
I have writer's block today, but I will ask a question based upon a recent installation that I saw.
You visit a 1950s bungalow. You notice an original wooden cased four way fuse box with porcelain fuse wire holders, all in good dry condition. The final circuits are 30Amp cooker, 30 Amp sockets, and two 5 Amp lighting circuits. The fuse box is supplied by what look to be single insulated, or quite small compared to moderns standards, red and black tails from a Voltage operated earth leakage circuit breaker. The black cable V.O.E.L.C.B. connection to the original earth rod has been disconnected. The test button of the V.O.E.L.C.B. does not cause the unit to trip off. The cooker panel has a 13 Amp socket mounted in it. Zs at the cooker panel is 0.25 Ohms. The supply is P.M.E. All cables are P.V.C. insulated.
