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These undesired Ground Loops are created when two supposedly connected points are not at the same electrical potential. In my country (Australia) we use an earthing system that looks like this: In case of an earth fault, the fault current path looks like: Note the connection between the earth bar and the neutral bar at the "MEN link". Bonding appliances and materials to a ground system are critical to safety. The path to ground from circuits, equipment, and enclosures shall be permanent and continuous. Solar Panel Wiring: PV Wire vs USE-2 Wire, Tracer or Locating Wire vs THHN for Direct Burial Cables, More on Thermoset vs Thermoplastic Insulation for Your Copper Wire, Wire & Cable Acronyms: Making Sense of the Letters, Types of Material Used for Wire Insulation, Made in the USA ARRA, Buy American, and Getting the Right Copper Wire, VIEW THE LATEST INDUSTRY-WIDE COPPER PRICING, American Recovery and Reconstruction Act (ARRA) Information, Click here to subscribe to the Kris-Tech blog. What does this mean? What is interesting is the fact that the Neutral terminal has a wire that ultimately connects to Earth Ground as well. MathJax reference. National Fire Protection Association (NFPA) 2022, National Fire Protection Association (NFPA) 2022, National Fire Codes Subscription Service, The value of Standards Development Organizations, Alternative Fuel Vehicles Safety Training, Reducing Wildfire Risk to People and Property, State-approved NEC and NFPA 70E electrical online training, Certification for Electrical Safety in the Workplace, Safety in living and entertainment spaces, Free online access to the NEC and other electrical standards, How the NEC works with other NFPA standards, NEC enforcement and use in Latin America, NFPA 70B, Recommended Practice for Electrical Equipment Maintenance, NFPA 70E, Standard for Electrical Safety in the Workplace, NFPA 110, Standard for Emergency and Standby Power Systems, NFPA 111, Standard on Stored Electrical Energy Emergency and Standby Power Systems, NFPA 1078, Standard for Electrical Inspector Professional Qualifications, Certified Electrical Safety Compliance Professional, Certified Emergency Power Systems Specialist for Facility Managers, Certified Emergency Power Systems Specialist for Health Care Facility Managers. 3 Ways Electrical Distributors Are Investing in Tech, Green Tracer Wire: Applications, Use, and Installation Tips. Preventable mistakes in the electrical grounding system can leave it vulnerable to ground faults, side flashes and electronic noise, any of which could result in fire, damage to structures and personal injury. Both sets of wires enter your home through the utility's main service wires, run through your electrical service panel, and run side-by-side through every circuit in your home. Read our. So the earth path is not as good as the wires it's connected to, but it forms a reliable backup path. A minor scale definition: am I missing something? Where should you start? When does and when doesn't current flow to ground? - Electrical Got a friend, client, or colleague who could use some of this information? (B) Enclose the Water is vital for many body functions, but it isnt stored in the body. When thinking about grounding, always know what the end goal is supposed to be. The hybrid vehicle control system can detect a high voltage leakage to ground by use of ________. In many applications, grounding provides a circuit return path. A boy can regenerate, so demons eat him for years. This brings us to a term called Ground Loops. Symbol 5017 is the symbol for Earth Ground. Your home wiring system also includes other safety devices to help prevent disaster.