• The construction supervisor doesn’t need to specify the method used, but does need to understand it and agree that the proposed method will achieve acceptable results. It’s also valuable to wander by during the first few concrete footing placements and verify that the proposed method is actually being appropriately followed.
  • Jan 01, 2019 · Why do you have to bond an above ground swimming pool? Bonding your pool is a safety measure to prevent accidentally getting electrocuted or seriously injured. You need to create a field around your swimming pool by attaching the bonding wire to the metal deck, pool equipment, metal pool wall, and even the water.
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  • ground must be kept below 10,000 ohms (National Fire Protection Association, NFPA #407, Aircraft Service Guide). Note: When using a buried rod, resistance is affected by soil moisture. Federal and local codes require grounding and bonding connections during gravity transfer of flammable liquids from 55-gallon (208 liter) storage drums to approved
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  • If your valve is also made of plastic then you'll have to use a ground rod or an electrical outlet instead. For the copper coupling, follow the same instructions as in method 1. Multiple wires can branch off from the original wire with no loss of effectiveness.
  • A 50Ω match will be achieved when the angle between the ground plane rods and the horizontal is 42 degrees. If the radials are dropped even further, the impedance rises even more and in the limit condition, the radials all run in the same axis as the main radiating element to form a vertical dipole for which the radiation resistance / feed ...
  • Parallel Ground Connection • Q: When do you connect ground in your system in this manner? Circuit 2 Z1 I 1 Z2 I 2 Circuit 3 Z3 I 3 Circuit 1 SPG 3 - 26 Multi-point Ground Connection • Definition: circuits are connected to a reference ground plane at several different points by low impedance connections. • The low impedance, single ...

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rmeier2 (Robert Meier) July 30, 2019, 1:46am #13. A detached structure with a panel fed by a feeder always requires a grounding electrode system, could be two ground rods. Prior to the 2008 NEC that feeder could be 3-wire with the neutral bonded, 2008 and post 2008 code cycles a 4-wire feeder is required.
Ground rods, lugs, and bars protect you and your household from electrical shock. They also keep electronic equipment safe and limit neutral-to-ground voltage. Ground bars are added into a power panel to terminate ground wires, and ground lugs are used to attach the ground rod wire to the power panel.

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The ground rod would be for lightning...you still need the equipment ground from the main panel to the second building.
The fourth conductor was so the neutral and ground bars could remain isolated from each other in the sub-panel. And a ground rod could be used without neutral current being carried back though earth and the grounding conductors. The overhead three wire triplex service supplies cause some real problems.

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If you need more ground (dry soil, rocky, etc.) run #6 or larger wire out in a "star pattern" from that one ground rod to other ground rods/water pipes/etc. From that center ground rod--that is now your "zero volt" location (in telecom, also called the Ground Window). Run single cables to each of the other points that will need grounding.
Using a ground-fault circuit interrupter is one way of overcoming grounding deficiencies. Summary of Grounding Requirements. Ground all electrical systems. [for exceptions, see 29 CFR 1926.404(f)(1)(v)] The path to ground from circuits, equipment, and enclosures must be permanent and continuous. Ground all supports and enclosures for conductors.