The curtains open to reveal a tripped R.C.D. reported. The underground S.W.A supplies Koi Carp pond equipment such as water pumps, a U.V. unit and other stuff. Water ingress me thinks. The home owner says that the R.C.D. will not reset even with repeated tries.
I arrive to find that the owner has eventually got the R.C.D. to turn on.
Fault finding starts. The first section of S.W.A. cable reveals an insulation resistance of 0.03 Meg Ohms L to E. N to E o.k.
The owner wants the faulty S.W.A to be reconnected. I say that I can not as the supply is unreliable and maybe dangerous. I refuse to reconnect it. I install a temporary supply for the pond to keep it airated and to prevent freezing. It is cold here.
The faulty section of S.W.A. cable runs to a socket at a shed before continuing to the pond. I seem to recall in my dreams that the faulty S.W.A. cable is a 4 core type.
Do I use the 4th unused core as a new L if it tests O.K? YOUR THOUGHTS PLEASE.
P.S. Fencers have replaced an old fence with new posts, that is more than likely the cause of the damage to the cable.
Z.
