[Question] Reading are to high

[Jaco DJ]

Please can someone help me we did a revamp of an old house but when we did the tests the PSC was 5.67KA and the Earth Loop was 4.78 oum. What can be wrong and how can we fix it

[Eskom]

Have you isolated the installation and do the loop impedance test on incoming to see if its a supplier problem?

[Eskom]

What is the earthing system? You could try and add additional earth like the crow foot or just one or two earth spikes to the installation earthing.

[bergie]

how close is the house to the minisub?

[skatingsparks]

I am assuming you have a TN-S earthing systems if you are getting a high prospective short circuit and and low earth reading. Is it the old style supply cable, metal sheath used as earth. An earth wire kind of wrapped around the metal tape sheath? The earth on that stuff is usually useless after many years. Sometimes you just getting an earth from the old metal conduits (you said was an old house, right?)

Check with the local supplier if its possible to convert to TN-C-S earthing system. Check with them first to see if there is PEN conductor. A lot of the time when they run new cables to feeder pillars they link Neutral and earth at the feeder pillar.

Also the nice people from the power company could have done a kak joint on the cables outside the house under the road. They still use the armouring as the earth and have been known not to bother connecting it. Had them dig up the road a few times. They love that.....

Alternatively, new supply cable from boundary to board as a last resort.