Re: minimun voltage for person
WMitch is right about the variability of body resistance. 2 times when I was a kid I got a nasty shock from picking up a 1.5 volt D cell by the ends. This ways the result of playing with my electrical stuff for hours without washing my hands. This would allow tremendous amounts of perspiration salts to build up on my fingers. Since then I have found that frequent handwashing increases skin resistance in addition to reducing the number of germs to where the human immune system has a fighting chance. Problem then is how do you wash your hands on some construction sites?
About a few months after I bought my first pair of hot line gloves they saved my life. I was removing a panelboard cover that has those bogus blind hooks that grab onto the inside lip of the box and sure enough one of those hooks was wrapped around a 20 amp 120 volt circuit. It took about 30 seconds to blow an alledgedly fast acting fuse and the panelboard cover was very heavy on top of that.
Skin resistance also depends on how much skin area is in contact with an energized part. Weight among other factors also plays a role - if you accidentally sit or step on a live voltage the let-go current threshold is a lot lower because of body weight.
Needless to say, paranoia is a survival skill with electrical equipment.
WMitch is right about the variability of body resistance. 2 times when I was a kid I got a nasty shock from picking up a 1.5 volt D cell by the ends. This ways the result of playing with my electrical stuff for hours without washing my hands. This would allow tremendous amounts of perspiration salts to build up on my fingers. Since then I have found that frequent handwashing increases skin resistance in addition to reducing the number of germs to where the human immune system has a fighting chance. Problem then is how do you wash your hands on some construction sites?
About a few months after I bought my first pair of hot line gloves they saved my life. I was removing a panelboard cover that has those bogus blind hooks that grab onto the inside lip of the box and sure enough one of those hooks was wrapped around a 20 amp 120 volt circuit. It took about 30 seconds to blow an alledgedly fast acting fuse and the panelboard cover was very heavy on top of that.
Skin resistance also depends on how much skin area is in contact with an energized part. Weight among other factors also plays a role - if you accidentally sit or step on a live voltage the let-go current threshold is a lot lower because of body weight.
Needless to say, paranoia is a survival skill with electrical equipment.
