Hello again,
I had previously asked for references to an alleged occupational requirement for a maximum touchable voltage of 24V and I thank you for your responses. I saw nothing concrete which gave legitimacy for a 24V limit. I found the references to the telephone company interesting. I have another somewhat related question. What is the reasoning for selecting 42.2V peak and 60Vdc as a limit? Does UL explain this anywhere? The reason for this line of questioning is that I am involved in a debate on an electrical safe work practices policy(working on energized equipment). The issue of applicability involves who is covered. Ideally everything should be de-energized before performing work, but that is not always the case. There are plenty of situations where that will not occur. So, the question is at what voltage should the policy kick in. Regards, Bob Brister Digital Equipment Corp.
