Wow I don't think I believe that one. No OC device at the house? Do you really mean an isolating switch (no fuses) is all the service requires?
There was a time here where some houses had no main and I know of two of those that burned through the enclosure. Fortuneately the houses did not burn down. A Utility transformer is often so overfused that the transformer will feed a fault for a long time before anything blows. Sounds like there are a few things going on down under that have me scratching my head.
