RimstarOrg has another excellent video – a whirlwind tour of the different meanings and applications of earth and ground, including an evolving diagram for understanding how power comes in, and eventually goes to ground.
Watch:
What is ground and what does it mean to do Earthing? Here I answer what ground is, how it relates to your wall socket and the wiring in your appliances, how to get grounds for your high voltage and other experiments, and about the ground symbol in electrical schematics.
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