0
Still curious? Ask our experts.
Chat with our AI personalities
Fran
Lao
BlakeAdd your answer:
Earn +20 pts
What is a static switch?
A static switch is a switch that uses the electrostatic current that flows through the human body to power on or off the device.
Why an electric shock from a 240v supply can kill you but an 3000v DC supply from a static charge should not while walking across a nylon carpet and touching a metal door knock?
can dc volts kill you? It is in relationship to the amount of time the body is conducting the milliamp current. With your DC static charge, once the potential voltage has equalized by grounding the current flow stops. On a 240 volt system the voltage remains constant thereby causing the current to continually flow through the body. If you have ever has an electrical shock you know the feeling.
Why is an open ground so dangerous?
Current flows from the voltage source to ground. If an appliance is not grounded somehow the hot were to touch the metal case and you touched the case while standing on the ground then the current would try to travel to ground through your body. I once was called to debug a situation in a residence in Florida where the owner got a shock everytime he took a shower. Turns out the main electric panel had never been grounded to earth and thus the whole house was floating above earth ground. Essentially all the metal pmumbing was at about 60 volts above ground. When taking a shower the water stream conducted the current through the owner's body to the metal drain which was earth grounded.
What happens if you touch an exposed electrical wire?
If the wire is carrying an electrical current, and if the current has enough voltage, the current can leave the wire and pass through your body. This is painful, and can causes burns or death.
What part of the human body has the highest resistance to electrical current?
The Skin
