What is Voltage Drop Calculation, Formula For Copper, Aluminium, iron, Silver Cable

What is Voltage Drop

Voltage drop is defined as the amount of voltage loss that occurs through all or part of a circuit due to impedance. A common analogy used to explain voltage, current and voltage drop is a garden hose. … This condition causes the load to work harder with less voltage pushing the current.

Voltage drop Formula for DC/Single Phase:

Vdrop = I*R

I – flow of current

R – resistance of the circuit

Resistance of the wire = Resistivity of the material* Length/Cross-section of the cable

AWG to MM2 Chart

MM to AWG to MM2 Chart

Example Problem:

How far can No. 6 copper wire be used to carry a load of 30 amperes at 240 volts and keep within 1% voltage drop?


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