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d. Grounding System Tests <br /> 1) Visual and Mechanical Inspection <br /> a) Verify ground system is in compliance with Drawings and <br /> Specifications. <br /> 2) Electrical Tests <br /> a) Before backfilling trenches, and placement of sidewalks, <br /> landscape and paving, measure the resistance of each <br /> electrode to ground using a ground resistance tester. <br /> Perform the test not less than two days after the most <br /> recent rainfall and in the afternoon after any ground <br /> condensation (dew) has evaporated. <br /> b) After all individual ground electrode readings have been <br /> made, interconnect as required and measure the system's <br /> ground resistance. <br /> c) The grounding test shall be in conformance with IEEE <br /> Standard 81. <br /> d) The current reference rod shall be driven at least 100 feet <br /> from the system under test. <br /> e) Measurements shall be made at 10 feet intervals beginning <br /> 25 feet from the test electrode and ending 75 feet from it in <br /> a direct line between the system being tested and the test <br /> electrode. <br /> f) Point-to-Point <br /> a) Perform point-to-point tests to determine the <br /> resistance between the main grounding system and <br /> all major electrical equipment frames, system neutral, <br /> and/or derived neutral points. <br /> 3) Test Values <br /> a) The resistance between the main grounding electrode and <br /> equipment ground shall be no greater than five ohms per <br /> IEEE Standard 142. <br /> b) Investigate point-to-point resistance values that exceed 0.5 <br /> ohms. <br /> c) The Contractor shall fill in Grounding System Test Form <br /> TF3 located in Section 16010 Appendix "A". <br /> d) Plots of ground resistance shall be made and submitted to <br /> the Engineer for approval. <br /> e. Panelboard Test <br /> 1) Visual and Mechanical Inspection <br /> a) Inspect for physical damage, proper anchorage and <br /> grounding. <br /> July 2007 Division III-224 NEI Phase II Water and Sewer <br /> CIP Nos. 7468, 7589, 7590 <br />