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"Real success delivers you up to a high degree of Allah's floor" Hüseyin Güzel

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Basic Principles of Electrical Grounding


Basic Principles of Electrical Grounding

for Electricians & Technicians


Electrical Grounding

This is a discussion of the basic principles behind electrical grounding systems and how grounding is related to safety and the effective operation of circuit protection devices such as fuses and circuit breakers. The discussion moves quickly from a basic study of grounding to simple examples of a single building installation and onto facilities with multiple buildings and structures.

!!! Finally the discussion will briefly cover grounding as it applies to lightning protection and the control of static electricity.

Grounding to most engineers, technicians and electricians is a simple subject and little attention is paid to it other than knowing that something is required. To some people there are grounds and then there are “Clean Grounds”.


Figure 1 – High earth resistance, safe Sally

Thirty years ago when computers were relatively new, there were many approaches to grounding, particularly for electronics and computers.

" Some of these approaches established what was called a “Clean Ground” which was often isolated from the power grounds.

!!! Many of these ideas have been proven to be ineffective and sometimes dangerous to equipment and personnel. As frequencies became higher and higher (computer speeds faster and faster) research accelerated into the subject of grounding, shielding, EMI, lightning protection and static electricity.

The research resulted in the basic science behind grounding. This subject is not as simple as once thought and one needs a clear understanding of the basic principles. First, the ground or grounding of a circuit is a misnomer. For most purposes the term means earthing or connecting the circuit to earth.

In actuality, it’s connecting the circuit to a common point of reference – for most systems that is the earth.


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#grounding #electrical #principles

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