When installers put in a new airconditioner they told me a new switchboard was requird. They arranged a quote and the quote included a new "earth" . I asked Stuart from Action Electrics for a quote and he and I seached for and found the house was already earthed. Saved me $200.
After installing new board Stuart helped me with the airconditioner which did not start because of an installation error by the installers.
Stuart was terrific and the inspector who inspected the system 2 days later said the switchboard installation was a "beautiful job.
Thanks to Stuart

Approximate cost: $1000