Feb 12, 2008 · A ground resistance tester as manufactured by Megger, can be used for a two-point resistance test per IEEE Std 81. Is there a low impedance ground such as a metal water pipe system …

Aug 13, 2003 · The resistance to ground shall be measured using a fall- to - potential method described in IEEE-81. I'm not sure what this test entails. Is there any way I can read this standard without …

Mar 7, 2025 · As others have mentioned, it is likely asking for 10 ohms or less from the ground bar to the earth, which you would perform a fall of potential test per IEEE 81. The ground bar conductor to the …

Jan 4, 2019 · I have question about IEEE-80 ground grid. IEEE-80 says that the total depth of the horizontal ground grid below grade should be 18 inches. But it does not give information that how …

Jun 6, 2012 · I have a project that calls for Fall of Potential test OR alternative in accordance with IEEE Standard 81. New School has 1200 amp 480/277 3 phase service. we have 3 ground rods in a …

Mar 27, 2008 · I would like to know more about the IEEE's 5 ohm recommendation for grounding systems for sensitive equipment. For background, I'm a mechanical engineer in an MEP firm. We …

Feb 27, 2006 · 2. Electrical Tests a. Perform fall-of-potential or alternative test in accordance with ANSI/IEEE 81 on the main grounding electrode or system. b. Perform point-to-point tests to …

May 5, 2006 · The IEC Technical Committee 81 responsible for lightning protection of structures has published hypothetical scenarios for the division of lightning current for structures struck by lightning …

Feb 21, 2020 · You may be able to get some reduction in the required distance to the stakes for current injection and voltage probes by applying the Tagg slope method to the fall-of-potential …

Dec 4, 2025 · NEC 2026 has functionally mandated the use of IEEE 1584, and IEEE 1584 is only realistically accessible through licensed software or specialized consultants. That is not how most …