Depends on what you are using it for:
aprox 10% of the diameter of the wire
Baltimore, Maryland
mainly on farms in the US
Place a current meter (rated for several hundred amps) in series with the battery. Or Place a large gauge wire of known resistance in series with your battery, use a high precision volt meter to measure the voltage drop across this piece of wire, then divide the measured voltage drop by the resistance of the wire. This will give you the current traveling through it.
The type of wire you are looking for is called lamp cord. It comes in different colours usually to match the fixture. Fixtures hanging from chains use a clear insulation so as to blend in with the fixture chain colour. Remember that the smooth wire of the lamp cord connects to the hot wire and the ribbed wire on the lamp cord connects to the neutral wire in the ceiling junction box.
voltage
something
Uninsulated wire does not have any outer protective covering, making it more susceptible to damage and electrical shock. Insulated wire, on the other hand, is covered with a material like rubber or plastic to protect the wire and prevent contact with electrical currents. This insulation provides safety and helps prevent short circuits.
Mainly because wires are insulated. In the case of being on an uninsulated wire the bird isn't grounded since both feet are on the wire.
aprox 10% of the diameter of the wire
If the solenoid wire is not insulated the number of turns will be reduced by the uninsulated wires touching and shorting out the turns.
A ground wire is a typically uninsulated copper wire. The intent is to connect the wire to an electrical appliance or fixture to provide electricity a path to ground in the event of a short, thus preventing electrocution.
cloisonne
Copper bare wire refers to uninsulated copper wire that has not been processed, while copper millberry wire is clean, untinned, uncoated, and unalloyed copper wire that is at least 99.9% pure. Millberry wire is typically used for high-quality applications like electrical wiring due to its purity and consistency, while bare copper wire is more commonly used for grounding applications.
Answer for USA, Canada and other countries using similar 60Hz household electricity supplies "Ground or "earth" wire has green insulation or is just bare uninsulated copper wire. Answer for Europe and other countries using similar 50Hz household electricity supplies "Earth" or "ground" wire has green/yellow striped insulation or is just bare uninsulated copper wire which should always have a green/yellow striped insulation sleeve put over it when it comes into any terminal boxes or plugs.
Because if the wire is "hot", that is, has electricity flowing through it, and you touch a bare wire, then YOU become the "ground" and complete the circuit. This will cause at the least a bad shock, and at the worst it will cause death. The "ground" wires are bare, but that is because they do not have electricity flowing through them unless something shorts out (ie a "hot" wire which is normally black or red in color touches a ground or neutral wire which is normally white. The "ground" wires are either bare or have a green coating.
Paper insulated wire is coated with DuPont's NOMEX Paper wrap which can withstand temperature over 200 degrees centigrate. Enamel insulation usually is coated over aluminum wire and shipped from 3rd world countries to put in our houses because housing contractors don't care if your house burns down. bottom line is money, enamel is cheaper.