Re: 310.6 new restriction on unshielded cables
I just tried a 9 volt battery on my tongue. It tingles the tip of my tongue but has no effect on the center of my tongue. And, my tongue did not go numb.
On the other hand, grandmother could not let go of 120 volts. That was how we learned that my rabbit was chomping on the 120 volts. We did unplug her before there was any serious damage.
There are also some American Indians who have a genetic trait that causes them to have absolutely no perspiration glands in their hands. Jones & Laughlin Steel in Pittsburgh, PA had one of these people in the electrical department back in the 1970s. Drove the other electricians nuts because he could deliberately touch all 3 phases of a 480 volt or 600 volt circuit instead of using a voltmeter. I also have seen a black guy I know who can barehand 120 volts. I have also met a white guy who only gets a small tingle from grabbing 120 volts. Kind of nice to have factory installed hot line gloves. None of these buys would dare touch a 2,400 volt circuit. That definitely punches through skin.
You also have to remember that the reason for the once upon a time popularity of 4,800 volts for distribution was that it was the highest voltage that could be worked with multilayer leather hot line gloves and molded rubber hot line gloves had not been invented yet. Thanks to rubber gloves and EPDM line sleeves we can use more reasonable distribution voltages.
I just tried a 9 volt battery on my tongue. It tingles the tip of my tongue but has no effect on the center of my tongue. And, my tongue did not go numb.
On the other hand, grandmother could not let go of 120 volts. That was how we learned that my rabbit was chomping on the 120 volts. We did unplug her before there was any serious damage.
There are also some American Indians who have a genetic trait that causes them to have absolutely no perspiration glands in their hands. Jones & Laughlin Steel in Pittsburgh, PA had one of these people in the electrical department back in the 1970s. Drove the other electricians nuts because he could deliberately touch all 3 phases of a 480 volt or 600 volt circuit instead of using a voltmeter. I also have seen a black guy I know who can barehand 120 volts. I have also met a white guy who only gets a small tingle from grabbing 120 volts. Kind of nice to have factory installed hot line gloves. None of these buys would dare touch a 2,400 volt circuit. That definitely punches through skin.
You also have to remember that the reason for the once upon a time popularity of 4,800 volts for distribution was that it was the highest voltage that could be worked with multilayer leather hot line gloves and molded rubber hot line gloves had not been invented yet. Thanks to rubber gloves and EPDM line sleeves we can use more reasonable distribution voltages.
