I live in Australia, with three-prong 240v power supply including ground prong. I own a simple plug adapter that does not include the ground connection. As far as I'm aware, using any appliance with this plug removes the safety of the ground protection, but should not have any further effects on the appliance. Instead, if I use this adapter with any of my appliances (washing machine, air compressor, etc) the chassis of the appliance becomes energised. By this I mean that I get a strong shock if I touch the chassis. Also, my proximity voltage detector and neon testing screwdriver light up when touching the chassis. My multimeter detects 0.3v running through the chassis (by the suggested method of touching one probe to the chassis and holding the other probe in my hand) Just touching both probes to chassis and trying all settings on multimeter gives infinite "1" result.
What is going on here? How serious is this problem?
Notes: 1. Yes, this is a follow-up to a previous question asked. 2. Yes, I have booked an electrician to come out, but it is always good to investigate yourself so that I can make sure that the electrician addresses the problem correctly. Also, I want to know if it's even safe for me to be in my house and use my appliances in the meantime.