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Lightning ground rod8/1/2023 ![]() It the voltage passing through that equipment is higher then its operating threshold that equipment will fail and an outage of some type will take place. When current seeks and finds its own path(s) back to its voltage source usually it will pass through equipment. Earth Ground Resistance and Voltage Any earth ground connection has some resistance. One ground stake is going to be affected with a voltage spike much more than any other. ![]() If a return path is not designed, or multiple return paths exist, current will seek its own paths back to its voltage source. With two ground rods that arent connected together, lightning puts most of its power into one earth ground connection or another. In either case there is a parallel path back to the voltage source through the earth that crates the loop for current to flow on the earth ground conductor.Īlways remember current will always return to its voltage source.ĪC will seek a path to the AC source, DC will seek a path to the DC source and a static discharge (lightning) will seek a path back to its source which is usually earth. Another term that could be used is leakage current. If current is flowing on the conductor going to earth a ground fault exists. If you place a current probe around the conductor going to earth or the ground rod itself you should never see any current flowing on the conductor. From this point all other voltage measurements can be taken with earth referenced to zero volts. The only purpose of a ground rod or a group of ground rods forming a ground field is to have a designed electrical path to dissipate a static discharge voltage (which can be lightning or other forms of static electricity) to the earth. The electrical earth ground rod is usually considered at zero volts. Universal Grounding Kit - Coaxial Cable Shields.Surge Protective Devices For: RF, TV and CCTV SPDs.Purchasing The Right Surge Protection Devices.Using the Zero Method to Interpret Electromagnetic Compatibility Issues. ![]() These products are also backed by the foremost lightning protection design department in the world today.
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