cross sectional area of cable * voltage drop
Voltage determines a cable's insulation thickness, not its conductor thickness (or, more accurately, its cross-sectional area). It's current that determines the csa of a conductor, not voltage.
The voltage drop in a wire has nothing to do with the insulation. Voltage drop has to do with the cross sectional area of the wire.
It depends on its cross-sectional area, its construction, and how it is laid.
100 kw is the power drawn by the load. to calculate the cable size you need to know the voltage. From that you can calculate the current. this decides the cable size. for example if the voltage is 400Volts then the current flowing in the circuit when the load is 100 KW will be 250 amps. (100,000/400). for 250 amps to flow with out causing excessive heating of the cable the cross sectional area of the copper cable should be 150 sq mm.for a round cross section the diameter will be roughly 15mm.
if your load draws a max of 15 amps then you would use 14-16 gauge wire. the lower the gauge the more current that is allowed to pass. there are charts that show max current for diameter of wire
You can measure its diameter with a micrometer. For this the cable does not have to be vertical.
Simply work out the area of a section of cable.........
Conversion of cable diameter to circle cross-sectional area and vice versa. Scroll down to related links and look at "Conversion of cable diameter to circle cross-sectional area".
Electrical resistance is measure in Ohms. A function of voltage divided by current. It is also dependant on the length and cross sectional area of the conductor.
Resistance (Ohms) = Voltage (v) / Current (I)
Electrical resistance is measure in Ohms. A function of voltage divided by current. It is also dependant on the length and cross sectional area of the conductor.
Voltage drop can be minimized in a radial distribution by increasing the cross-sectional area of the conductors.