Student2011
New member
When we touch the line wire or supply wire we get shock. What is that? Is it voltage or current or something else?
Severity of shock is due to contact resistance. I missed that one on a test, I answered amperage.
When we touch the line wire or supply wire we get shock. What is that? Is it voltage or current or something else?
To receive a shock, one must touch a wire or other conductor, at the same time as being in contact with the ground/a grounded article, or whilst being in contact with another conductor energised at a different voltage.
Most electric shocks are between energised conductors and ground.
A minority are whilst insulated from ground, the shock resulting from touching two energised conductors at different voltages.
It is in theory perefctly safe to touch an energised conductor, if completly insulated from ground. Please dont try it though as a mistake could kill.
Every year people die as a result of touching energised overhead lines, yet birds perch upon these without harm. The bird is well away from ground, but the person is likely standing on the ground, or is in contact with grounded articles.
The degree of danger is in rough proportion to the current that passes through the body NOT to the normal operating current* of the circuit touched.
Touching a 120 volt conductor carrying 1,000 amps is no more dangerous than one carrying 15 amps, as regards electric shock.
Other factors being equal, high voltage circuits are more dangerous becuase the higher voltage, under similar conditions, will result in a greater current through the body.
*High current circuits are more dangerous as regards arc flash and burns, but not as regards electric shocks.
At higher voltage, just being near the HV lines - too close than what is safe can get you shocked!
At higher voltage, just being near the HV lines - too close than what is safe can get you shocked!
When we touch the line wire or supply wire we get shock. What is that? Is it voltage or current or something else?
Severity of shock is due to contact resistance. I missed that one on a test, I answered amperage.
Shocks and Burns are caused by current flowing through the body and not due to the voltage. However current flowing through the body follows ohm's Law I =V/R.
Shocks and Burns are caused by current flowing through the body and not due to the voltage.
But of course voltage effects the current.
But of course voltage effects the current.
However current flowing through the body follows ohm's Law I =V/R.
So you rub your socked feet on the carpet in the winter and touch the doorknob, the several thousand volt charge passes how much current through your body? Not what Ohms "law" would tell you it is.
Does it not become an open circuit?