https://www.electricaltechnology.org/2015/05/earthing-and-electrical-grounding-types-of-earthing.html
Electrical Earthing, Grounding, Methods Of Earthing, Types of Earthing, Components of Earthing And Its Specifications In Respect To Electrical Earthing for Electrical Installations
33 Comments
Tomi Engdahl says:
Grounding – Safety Fundamentals (1hr:13min:19sec)
https://www.youtube.com/watch?v=mpgAVE4UwFw
2014 NEC – Grounding Versus Bonding (26min:26sec)
https://www.youtube.com/watch?v=3vvvv5QVZoA
Tomi Engdahl says:
Electric Code Violation: Sharing Neutral Wires of Three Circuits Creates Hazardous Magnetic Field
https://www.youtube.com/watch?v=-CaES0-yinI
When neutral wires of two or more separate circuits are connected at other than the main panel the electicity has multiple return paths resulting in net currents. This can cause fire, shock and magnetic field hazards.
Tomi Engdahl says:
Moving Violations Video No. 29, by Russ LeBlanc: GEC & Ferrous Metal Raceway NEC Article 250.64 (E)
https://www.youtube.com/watch?v=hPubuC0EzRc
Tomi Engdahl says:
Grounding – Safety Fundamentals (1hr:13min:19sec)
https://www.youtube.com/watch?v=mpgAVE4UwFw
Learn Grounding – Safety Fundamentals with code expert Mike Holt in this excerpt from his best-selling library – Grounding vs. Bonding DVD program.
Tomi Engdahl says:
Understanding Rise of Earth Potential
https://www.youtube.com/watch?v=ziOKoWEIDH8
Rise of Earth Potential from substation phase fault.
Tomi Engdahl says:
Grounding and Bonding
https://www.youtube.com/watch?v=LoQVdEQlmXM
This is a brief walk through of a simple grounding and bonding system, and what happens with the flow of current in normal operation, and in a ground fault condition.
Tomi Engdahl says:
Clēēr 600 A Loadbreak Connector System
https://www.youtube.com/watch?v=-x54b8OaXPY
Clēēr Loadbreak Connector reduces outages by providing reliable switching under load — as reliable as traditional 200A loadbreak connectors.
Tomi Engdahl says:
Testing Electrical Substations
https://www.youtube.com/watch?v=R9Z2VNRat1c
Power plants and substations are the major components of the energy system. Aside from power transformers, the main parts of such a plant include instrument transformers, the protection and control system, as well as switching elements like circuit breakers and disconnectors. For a reliable supply of electricity, the correct operation of all individual components and their seamless interaction has to be assured – during the entire lifecycle of the plant.
Substation Circuit Breaker Testing
https://www.youtube.com/watch?v=dW2YYABJAac
Circuit Breakers are an important and critical component of the power delivery system. In this video, learn about the components of a circuit breaker, different breaker technologies, and the various breaker testing methods.
Tomi Engdahl says:
What is a Lightning Arrester
https://www.youtube.com/watch?v=yFCWzQxT3nE
A short and simple overview of a lightning arrester for the non-technical
How to install Type 2 Surge Arrestors without Integral HRC Fuse
https://www.youtube.com/watch?v=r3glwiMcmQk
Tomi Engdahl says:
Clēēr 600 A Loadbreak Connector System
https://www.youtube.com/watch?v=-x54b8OaXPY
Clēēr Loadbreak Connector reduces outages by providing reliable switching under load — as reliable as traditional 200A loadbreak connectors.
Tomi Engdahl says:
Ground Rod Resistance
https://www.youtube.com/watch?v=yVsmRY6NTgo
The ground rod is an effective grounding component if used properly. Watch this video to learn more.
Tomi Engdahl says:
Testing Electrical Substations
https://www.youtube.com/watch?v=R9Z2VNRat1c
Power plants and substations are the major components of the energy system. Aside from power transformers, the main parts of such a plant include instrument transformers, the protection and control system, as well as switching elements like circuit breakers and disconnectors. For a reliable supply of electricity, the correct operation of all individual components and their seamless interaction has to be assured – during the entire lifecycle of the plant.
Substation Circuit Breaker Testing
https://www.youtube.com/watch?v=dW2YYABJAac
Circuit Breakers are an important and critical component of the power delivery system. In this video, learn about the components of a circuit breaker, different breaker technologies, and the various breaker testing methods.
Tomi Engdahl says:
How Does It Work: Substations
https://www.youtube.com/watch?v=Iu6CqiM1ANg
Safety in Substations and Switchyards [PREVIEW]
https://www.youtube.com/watch?v=B-sQVoxjJTM
Tomi Engdahl says:
How to apply the earthing device in HV/MV substations with guidance device for insulating sticks
https://www.youtube.com/watch?v=tvvFBQGtIPs
High voltage switch installation
https://www.youtube.com/watch?v=Uyu08KxB0-Y
44 kv barehand operation
Neat. I liked the use of the current probe to check the bypass link was working and that the new switch was passing current before the link was removed.
Tomi Engdahl says:
What is the Difference Between Neutral, Ground and Earth?
https://www.electricaltechnology.org/2015/08/difference-between-neutral-ground-and-earth.html
Tomi Engdahl says:
33kV Live suspension Insulator replacement
https://www.youtube.com/watch?v=fP6n6DCPlrI
33kV Live suspension Insulator replacement works carried out at Ratkarawwa, Sri Lanka, without interrupting the power by linemen working in Ceylon Electricity Board.
Tomi Engdahl says:
Live line work
https://www.youtube.com/watch?v=VG0KB4XODXk
Refurbishment of 400kV live power line using aerial live work techniques by Chopper Worx
115kv dragon
https://www.youtube.com/watch?v=CB5UXvMTNVo
Tomi Engdahl says:
AEMC® – Understanding Ground Resistance Testing
https://www.youtube.com/watch?v=NP9Jbdi_k6s
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.
Tomi Engdahl says:
Grounding – Ground Resistance Measurement, 250.53(A)(2) (26min:27sec)
https://www.youtube.com/watch?v=Yg6G5VUSsWA
This real world test will be conducted by Nationally recognized Code Expert Mike Holt and electrical utility professional Joe Symmes using a 3 pole fault potential method, a clamp on meter to check the ground, an Amp meter to measure the current flow in the event of a ground fault and a volt meter and also test the test potential.
Mike is nationally recognized as one of America’s most knowledgeable Code Experts and electrical trainers. His instruction has helped tens of thousands of electrical professionals ensure that the proper design and installation of electrical systems are in accordance with the NEC. His dynamic and animated teaching style is relaxed, direct and enjoyable.
Tomi Engdahl says:
The Basics of Grounding Systems
https://www.ecmweb.com/content/basics-grounding-systems
Should I install an ungrounded, solid, or high-resistance grounding system? That is the question asked by many designers and installers. The answer to this question depends on many factors. To make the correct decision, you must completely understand the pros and cons of each type of system. But first, you must also understand the different types of faults that can occur on your system and in what
Tomi Engdahl says:
What is the difference between Bonding, Grounding and Earthing?
https://electrical-engineering-portal.com/what-is-the-difference-between-bonding-grounding-and-earthing
Ground or earth in a mains electrical wiring system is a conductor that provides a low impedance path to the earth to prevent hazardous voltages from appearing on equipment. Earthing is more commonly used in Britain, European and most of the commonwealth countries standards (IEC, IS), while Grounding is the word used in North American standards (NEC, IEEE, ANSI, UL).
In TN Type Power Distribution System, in US NEC (and possibly other) usage: Equipment is earthed to pass fault Current and to trip the protective device without electrifying the device enclosure. Neutral is the current return path for phase. These Earthing conductor and Neutral conductor are connected together and earthed at the distribution panel and also at the street, but the intent is that no current flow on earthed ground, except during momentary fault conditions.
Consumer has no any permission to mix Neutral with earth at his premises here earthing and grounding is the different by practice.
Bonding
Bonding is simply the act of joining two electrical conductors together. These may be two wires, a wire and a pipe, or these may be two Equipments. Bonding has to be done by connecting of all the metal parts that are not supposed to be carrying current during normal operations to bringing them to the same electrical potential.
Bonding ensures that these two things which are bonded will be at the same electrical potential. That means we would not get electricity building up in one equipment or between two different equipment. No current flow can take place between two bonded bodies because they have the same potential.
The primary reason for bonding is personnel safety, so someone touching two pieces of equipment at the same time does not receive a shock by becoming the path of equalization if they happen to be at different potentials. The Second reason has to do with what happens if Phase conductor may be touched an external metal part.
The bonding helps to create a low impedance path back to the source. This will force a large current to flow, which in turn will cause the breaker to trip.
In other words, bonding is there to allow a breaker to trip and thereby to terminate a fault.
Tomi Engdahl says:
External earth loop impedance (Ze) test
https://www.youtube.com/watch?v=PUTn3t65na4
For many installations the resistance of the earth electrode can be measured using an earth fault loop impedance test instrument.
This test is explained in the video.
Loop Impedance
https://www.youtube.com/watch?v=HsWWKzjVUxE
Loop impedance, why it matters and typical values.
Tomi Engdahl says:
2017 NEC – Equipotential Bonding [680.26], (20min:51sec)
https://www.youtube.com/watch?v=wyOILpoR39A
Tomi Engdahl says:
Why we do not join ground wires and neutral wires together downstream of the service equipment.
https://www.youtube.com/watch?v=lI59y1h3MxU
Parallel Paths
https://www.youtube.com/watch?v=NrHy9pwv1iQ&t=0s
This demonstration shows why we do not want to connect grounds and neutrals together downstream of the service equipment.
Tomi Engdahl says:
Why Neutrals & Grounds are Connected in a Main Panel
https://www.youtube.com/watch?v=nKWf7XTg-wg
Why Neutrals & Grounds are Separated in a Sub Panel: https://youtu.be/5iEuaAYs5x4
Tomi Engdahl says:
Why Neutrals and Grounds are Separated in a Sub Panel
https://www.youtube.com/watch?v=5iEuaAYs5x4&t=0s
Here we go over the reasons behind why neutral and ground wires are separated in sub panels. I also simulate what happens if you leave the neutrals and grounds bonded with a bonding screw or strap and where the current goes within the grounding system in a bonded neutral scenario.
Tomi Engdahl says:
Understanding Grounding in Audio
https://www.youtube.com/watch?v=f2soKg9JAUA&feature=youtu.be
Tomi Engdahl says:
From discussion at https://www.facebook.com/groups/2324569074469604/permalink/2948698262056679/
There is a huge difference between grounding and equipment safety bonding often called earthing(the green wire)
The planet earth DOES NOT dissipate energy from a faulty in a piece of equipment. Voltage on the equipment safety bond(often called an earth) is trying to return to its source in this case a generator NOT the planet earth
Any power system needs ONE ground stake only. More grounding stakes DOES NOT make it safer, in fact having more than one grounding stake in a system increases your chances of damage to equipment by a near by lighting strike as it gives a path of least resistance thru your cables and equipment as the lighting strike dissipates into the earth.
When lighting strikes it dissipates out in a circle from the point of the lightning strike. Imagine a dart board center is where the lightning strikes and the outer 1point ring is where the energy has full dissipated into the planet earth. If you have a ground rod at the 9point ring close to center and the strike and another rod at the 2point ring, energy from the lighting strike at center will flow thru your cables and equipment as the path a least resistance instead of flowing thru the earth as is dissipates and this will cause damage to your equipment
There is alot of misunderstanding out there even among licensed electricians on the difference between grounding and electrical safety bonding often called earthing(the green wire), they are different things
watch this video by Mike Holt with the Nation Electrical Commission in the US on Grounding Fundamental
https://youtu.be/mpgAVE4UwFw
Tomi Engdahl says:
https://sound-au.com/earthing.htm
Tomi Engdahl says:
What does GROUND mean?
https://www.youtube.com/watch?v=bOxzsGu2Aaw
What does GROUND mean?
In this video we look at different types of ground symbols you may see and why we use different ones. We talk about Earth ground, chassis ground, a generic ground, analog and digital grounds.
Tomi Engdahl says:
Where Does Grounded Electricity Actually Go?
https://www.youtube.com/watch?v=jduDyF2Zwd8
Grounding is one of the most confusing and misunderstood aspects of the grid.
Tomi Engdahl says:
Ham Busts The Myth Of Ground
https://hackaday.com/2024/06/04/ham-busts-the-myth-of-ground/
Ground is a Myth! | 2024 ARRL National Convention
https://www.youtube.com/watch?v=VvE570NPmmI
Tomi Engdahl says:
https://hackaday.com/2024/06/04/ham-busts-the-myth-of-ground/