I indicated that the Earthing Systems Design Steps process has (3) main steps:
Earthing Systems Design
Steps

And I explained the first step: Data Collection in the following Articles:
I explained the second step: Data Analysis in the following Articles:
And I explained What we are going to design for grounding system in any building in the following Articles:
And, in Article " Grounding Design Calculations – Part One ", I indicated the following:
Grounding System Design
Calculations according to type of the building
The procedures for performing the Grounding System Design
Calculations can differ slightly according to the type of the building
as follows:

First: Domestic,
commercial and industrial premises
We mean by domestic, commercial and
industrial premises, all installations up to 1,000 V ac and 1,500 V dc 
between phases, with some minor exceptions.

And I started discussion for Methods of Grounding Design Calculations of Domestic, commercial and industrial premises as follows:
Methods of Grounding Design
Calculations
There are many methods can be used for
performing Grounding System Design Calculations But the common methods
are:

In this Article and Article " Grounding Design Calculations – Part Two ", I explained the first method of grounding design calculations: Equations Method and solved examples.
And I explained the second method of grounding design calculations: Nomographs Method in Article " Grounding Design Calculations – Part Three".
Also, I explained the third method of grounding design calculations: Excel Spreadsheets Method in " Grounding Design Calculations – Part Four ".
And I explained the forth method of grounding design calculations: By using Tables In Articles " Grounding Design Calculations – Part Five " and " Grounding Design Calculations – Part Six ".
Today, I will explain the fifth method of grounding design calculations: Online Earthing Calculators Method.
You can preview the following Articles for more info:
Fifth Method: Online
Earthing Calculators Method

Online Earthing
Calculators Method
In
this method, I will introduce some good online earthing calculators that can
help electrical designers in grounding design calculations. I choose the
following (3) online earthing calculators providers:
These (3)
earthing calculators providers provide (6) online earthing calculators that
will be explained herein.

Important
Before
using any online earthing calculator, you must check its compatibility with
your local codes and standards.

First: LPI Earthing Calculator
This,
user friendly, earthing calculator allows you to estimate earth system
resistance based on IEEE and other international earthing/grounding
standards.

1 Calculator sections
This
calculator includes (3) different sections (see fig.1), they are as
follows:

1.B Parameters Section
This
section includes (3) parameters category (see fig.3) as follows:
Each
category's parameters differ according to the selected configuration from the
configurations section.
1.B.1 Soil Category
It
includes the resistivity parameter (Ωm) which can be inserted by one of the
(2) following methods (see fig.4):
1.B.2 Products Category
You
can perform the calculations with or without using vertical rods (see fig.9);
this is done by on/off the button beside the rod product.
The
dimensions parameters in above table can be inserted in the calculator by
editing the blue underline values for each parameter.
1.B.3 Layout Category

1.C Results Section
This
section includes (3) results tabs (see fig.14)as follows:
RESLO
(Ground Enhancement Compound) and GRIP (Ground Resistivity Improvement
Powder) are used in earthing systems to reduce soil resistivity adjacent to
earth system electrodes so as to reduce the resistance of the earth system.
What
is the R range?
Formulas
provided in earthing standards assume perfect contact between the buried
earthing conductor and the soil. The result is a theoretical bestcase
scenario. In real world applications it is generally found that perfect
contact is not possible, and the measured result can in fact exceed this
calculated bestcase scenario by a factor of 10 or more. The “Range”
given in the LPI Earthing Calculator provides a lower limit (the theoretical
bestcase scenario) and an upper limit or worstcase scenario for a given
soil type.
What
is R Typical?
Based
on installation experience and careful field testing, the LPI Earthing
Calculator is also able to provide a very useful “Typical” result which shows
the likely result for typical conditions seen in the field.

2LPI Earthing Calculator's Using method
The
method of using this calculator is working left to right as follows:

You can use the LPI Online Earthing Calculator by click on the link.

In the next Article, I will continue explaining grounding design calculations by using other Online Earthing Calculators. Please, keep following.
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