Ground Neutral and Hot wires explained – electrical engineering grounding ground fault
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Ground neutral and hot wires explained. In this video we look at the difference and purpose of the ground wire, the hot wire and the neutral wire in a north american residential electrical system. We look at ground faults, GFCI, current, voltage and simple examples for each.
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Electrician earthing electric potential grounding electrician electrical safety, ground neutral and hot wires explained,
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Electrical Grounding Explained | Basic Concepts
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00:49 Why do we a Ground?
01:23 Earth Ground
02:07 Graphical Symbol
02:32 Common Ground
02:58 1) Typical example electronic schematic
04:17 2) Typical example Industrial schematic drawings
04:35 Ground loops
In this video, we’re going to discuss the commonly used, but often misunderstood term, Ground.
There are lots of different names for Ground…
There’s Earth, Earth Ground, Neutral, Common Ground, Analog Ground, Digital Ground, and Instrument Ground… just to name a few. And then you have terms like Ground Loops…
Quite often, Ground means different things to different people. For example, Ground to an electrician might mean something different than Ground to electronic engineers.
There are lots of reasons for grounding.
Proper grounding is a critical safety measure in all electrical systems and installations.
We ground the exposed part of electrical equipment so that internal wiring failures don’t raise the voltage potential of these exposed parts to dangerous levels.
Let’s look at some of the different perceptions of the ground.
It’s probably safe to say that Earth and Earth Ground are the same things.
Earth ground is the reference point in an electrical circuit that is a direct and physical connection to the earth. Earth Ground is the ground that you walk on.
Earth Ground is true zero volts. It is the true zero reference for any and every electricity discussion.
You don’t have to go far to see evidence of earth ground.
You might be able to spot a copper rod in the ground with a heavy wire attached to it.
This Earth Ground wire runs to your power panel and ultimately connects to all the Ground terminals of every receptacle in your house.
Notice that we’ve used an electrical symbol for Earth Ground.
The symbols used to indicate ground terminals are found in the International Electrotechnical Commission document IEC 60417 Graphical Symbols for Use on Equipment.
Symbol 5017 is the symbol for Earth Ground.
Every electrical circuit needs to be complete for the current to flow. In many applications, the common ground becomes the return path. For example, your car chassis is a common ground for the return current to the battery’s negative terminal.
Sometimes you’ll see the Earth Ground symbol used incorrectly on electronic schematics. The intention is to symbolize a Common Ground and it may not be connected to Earth Ground.
If ground points are not connected to Earth Ground but are connected to a Common Ground, it would be more appropriate to use the symbol IEC 60417 5020. This symbol suggests the points are connected to a frame or chassis terminal.
This brings up an interesting question…
Are all the components at the common ground potential connected at one point on the frame or chassis, or are they connected to the chassis at multiple locations?
Unfortunately, the schematic does not provide that answer. The schematic does not provide any clue as to physical connections. Industrial schematic drawings will indicate ground points and often provide more detail but physical connection points are still a mystery.
This brings us to a term called Ground Loops.
A Ground Loop is an unwanted electrical current path that can cause havoc in equipment or process control systems by introducing unwanted electrical noise.
These undesired Ground Loops are created when two supposedly connected points are not at the same electrical potential. That’s when Ohm’s Law takes over and creates an electrical current flow between two points.
Ground loops can be avoided if all devices are grounded together at one point. This type of grounded is referred to as Star Point grounding.
Unfortunately, in large industrial plants, multiplepoint grounding is the reality, and the possibility of ground loops is high.
With so many connections referenced to the ground within a facility, the chances of needing more than one ground point are great.
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RealPars Electrical Grounding
Measuring Resistance of Ground Electrodes – Fall-of-Potential test method
The measurement of ground resistance for an earth electrode system should be done when the electrode is first installed, and then at periodic intervals thereafter. This ensures that the resistancetoground does not increase over time. Since the resistance of the grounding, system can increase if the ground rods are eaten away by corrosive soils with high moisture content, high salt content, and high temperatures.
The most commonly used method of measuring the earth resistance of an earth electrode is the fallofpotential test method. This video describes the three basic types of the fallofpotential method:
• Full fallofpotential
• Simplified fallofpotential
• 62 Rule
This video describes these methods
The Earthing Movie: The Remarkable Science of Grounding (full documentary)
Share where you’re viewing the film from, how grounding (earthing) has helped you, and/or any questions in the comments below. Learn more at https://earthing.com. Connect with us on Facebook: https://www.facebook.com/earthing.com and Instagram: https://instagram.com/earthing. (use the hashtag earthingmovie)
You can also Watch the Earthing Movie on…
Amazon Prime Video:
\”The Earthing Movie: The Remarkable Science of Grounding\” is directed by Sundance AwardWinning filmmakers Josh and Rebecca Tickell (The Big Fix, FUEL, etc). This is a featurelength documentary based on their viral short film entitled ‘Down To Earth,’ that reveals the scientific phenomenon of how we can heal our bodies by doing the simplest thing that a person can do…standing barefoot on the earth.
The winner of the Audience Award for Best Documentary at Dances With Films Festival, the film shares the Tickell family’s journey with the healing power of grounding, aka earthing, and the people they met and learned from along the way; featuring grounding pioneer Clint Ober, author Deepak Chopra M.D., actress/activist Amy Smart, author/activist Mariel Hemingway, cardiologist Dr. Stephen Sinatra, renowned healer Dr Joseph Mercola, engineer and physicist Gaetan Chevalier, PhD. and many others.
Over 20 peerreviewed studies have shown that Grounding (Earthing) reduces inflammation…one of the most damaging internal biological processes that leads to chronic disease. So get out there and put your feet on the ground, and/or increase your grounding time indoors with grounding products. Your body and mind will thank you! Read up on all the studies and research at https://earthinginstitute.net
Watch this Q\u0026A with Mother and Filmmaker Rebecca Tickell as she shares her family’s healing grounding experience, which ultimately led to the film being made:
Join the movement:
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For more information on utilizing safe products to ground yourself indoors go to: https://earthing.com
To learn more about the science, research, and health benefits of grounding, go to: https://earthinginstitute.net/research
Produced by Big Picture Ranch: https://bigpictureranch.com
AEMC® – Understanding Ground Resistance Testing
Understanding Ground Resistance Testing
A grounding system is a conducting connection by which an electrical circuit or equipment is connected to earth. This connection is used to establish and maintain as closely as possible the potential of the earth on the circuit or equipment connected to it. This connection to the earth provides a low impedance path for electrical currents to travel under fault conditions. The system ground can be a simple metal rod driven into the ground, a grid consisting of multiple electrodes, or another type of grounding system.
When these disruptions of normal electrical operation do occur, it’s very important for the grounding system to operate efficiently. For this to be possible, the grounding circuit must have a low resistance connection to the surrounding earth. And a grounding system will only perform properly if it is designed and installed with local soil conditions taken into consideration.
This video is an introduction to grounding systems. Our goal is to provide you with a good basic understanding of why grounding is important, the environmental factors to consider when designing a grounding system, and the testing required to ensure your grounding is properly installed and performing to specifications.
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