In article " Voltage drop calculations Part One ", I indicated that there are eight methods for Voltage Drop Calculations as follows:
1 Ohm’s Law Method,
2 European method,
3 U.S method which divided to:
 Circularmils method,
 Chapter (9) tables method.
5 Quick OnLine method,
6 AmpereFeet method,
7 Lookup tables,
8 Excel spreadsheets.
And I explained the first two methods: Ohm’s Law Method and European method in this Article.
And, I explained the third method: U.S Method Circularmils method In Article " Voltage drop calculations Part Two ",
And, I explained the third method: U.S Method Chapter (9) tables method In Articles:
Also, in Article " Voltage Drop Calculations Part Four ", I explained the following methods for Voltage Drop Calculations:
 Approximate Mathematical method,
 AmpereFeet method,
 Lookup tables,
7 Quick OnLine Method
Under this method, I will introduce the most famous and most used online Voltage Drop Calculators which are:
 Advanced Voltage Drop Calculator for 600 volt Building Wire,
 Three Phase Voltage Drop Calculator,
 Standard Voltage Drop Calculator,
 Voltage Drop Calculator for any voltage,
 Minimum conductor Size Calculator for Given Voltage Drop,
 Maximum Length Calculator for Given Voltage Drop,
 Southwire Voltage Drop Calculator,
 Nooutage Voltage Drop Calculator,
1 Advanced Voltage Drop Calculator for 600 volt Building Wire
This Calculator
calculates voltage drop by finding the actual approximate operating
temperature of the conductor and using the conductor's resistance at this temperature.
Notes:

2 Three Phase
Voltage Drop Calculator
This JavaScript calculator runs
in a web page. It uses Table 9 and Table 8 data to calculate 8 different
voltage drops for comparison. For 3phase, 3 wire in PVC, Aluminum, and
Steel conduit.

3
Standard Voltage Drop Calculator
Select the material
either copper or aluminum, the size of the conductor, the voltage and phase
from a list of common voltages, then enter the one way circuit length in
feet, and load in amperes. This Calculator finds voltage drop, per cent
voltage drop, and volts at end of circuit.

4 Voltage
Drop Calculator for any
voltage
Select the material
either copper or aluminum, the size of the conductor, then enter the voltage,
the one way circuit length in feet, and load in amperes. This
Calculator finds voltage drop, per cent voltage drop, and volts at end of
circuit.

5 Minimum
conductor Size Calculator
for Given Voltage Drop
Select the material
either copper or aluminum, the size of the conductor, the voltage and phase
from a list of common voltages, then enter the maximum voltage drop in per
cent and load in amperes. This Calculator finds minimum conductor size,
voltage drop and volts at end of circuit.

6 Maximum
Length Calculator for Given
Voltage Drop
Select the material
either copper or aluminum, the size of the conductor, the voltage and phase,
then enter the volts, maximum voltage drop in per cent and load in
amperes. This Calculator finds maximum conductor length in feet and
volts at end of circuit.

7
Southwire Voltage Drop Calculator
Select the system
parameters which are material copper or aluminum, the phases single or three
and the installation method to be direct buried, conduit or overhead.
1
To calculate the Minimum Conductor Size:
Enter the input
parameters which are voltage, maximum voltage drop in per cent, Length of
Cable Run in feet and current at the end of cable run in amps.
2
To find the Maximum Circuit Distance
Enter the input
parameters which are Conductor Size, voltage, maximum voltage drop in per
cent and current at the end of cable run in amps.
Notes:

8
Nooutage Voltage Drop Calculator
Use
this calculator to estimate cable voltage drop for sizing conductors.
The calculation assumes uncoated copper or aluminum conductors operating at
the temperature selected and is based on the ac/dc resistance or impedance
from NEC Tables 8 and 9 for stranded conductors operating on a DC or AC 60Hz
system. The ampacity of each conductor size in the dropdown menu below
is based on NEC Table 310.15(B)(16) for 60C insulated conductors rated 0
through 2000 volts with not more than three current carrying conductors in
raceway, cable or earth with an ambient of 30C (86F).
Notes:

In the next Article, I will continue explaining Other Methods for Voltage Drop Calculations. Please keep following.
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