How can it be possible to create a high voltage and have a small gauge wire? Example: 3gj or 3000mw in a small wire (just an example)
insulation depend on voltage not wire
Voltage don't matter. It's the amps that will kill the wire. Just have really high voltage and low current and you can have lots of power going through smaller gauge wires. That's how it's done with overhead power lines.
The limit on the size of current carrying conductor is the heat produced due to power losses which leads to failure of the conductor, the power losses depends mainly on the square of the current (P=I^2R) so in power transmission voltage is being stepped-up to high values to decrease current and, in turn, the conductor size is reduced. Theoretically we could step-up the voltage to extremely high values and thus we could have a very thin wire to carry the small current because P=VI so at constant power as voltage V increases the current I decreases. But there are also limits for stepping up voltage as the insulation is directly affected by the voltage. In case of insultaed cables, the insulating material (PVC or XLPE) will fail if the voltage reaches its Break-down Voltage. In case of overhead transmission lines (OHTLs) the conductors are insulated by air between phases and the suspended disk insulators each has their own breakdown voltages. It should be noted that safety regulations determine a safe distance of 1 cm per Kv that you should keep from high voltage conductor. This means that for a consductors carries voltage of 500kv you should allow a distance of 5 meters away from it for your safety as its magnetic effect is not exlusive on its surface but for a distance around it proportional with the voltage.
Assuming the wires aren't linked, and assuming the voltages are with appreciate to floor. There's no difference between the wires, or as a minimum there need not be any variations. What makes you factor there may be. Voltage is only a knowledge utilized to the wire, through batteries for example. When you have a 1.5 volt battery and a ninety volt battery (that you would be able to purchase these, but steeply-priced) both with the bad tied to floor. Now take 2 small pieces of copper wire, about an inch long. Lay each one on the constructive terminal of one of the crucial batteries. That meets your stipulations. Nothing happens to the wires.
Wire six does not care about voltage, it cares about current. Every wire has a speific Fusing current when it melts or in a coil it burns up the insulation and shorts out.
