Dear Arunciblespoon
Please sir and with with respect , you have big gaps in your knowledge and understanding of the problem you have highlighted, but you are correct by saying one should NOT to rely on the 'Volt Stick'. It is just another tool to give a primary check and a dam site safer than 'Shorting to earth' as was first suggested. Testing should be carried out by trained, competent people, qualified and experienced in what they do. You sir, are not. This is not a criticism, but a statement of concern for your safety, and the safety of the people working with you.
Rob
Blue, why keep it if it's crap?