FIELD QUALITY CONTROL. A. Tests and Inspections: 1. After installing grounding system but before permanent electrical circuits have been energized, test for compliance with requirements. 2. Inspect physical and mechanical condition. Verify tightness of accessible, bolted, electrical connections with a calibrated torque wrench according to manufacturer's written instructions. 3. Test completed grounding system at each location where a maximum ground- resistance level is specified. a. Measure ground resistance no fewer than two full days after last trace of precipitation and without soil being moistened by any means other than natural drainage or seepage and without chemical treatment or other artificial means of reducing natural ground resistance. b. Perform tests by fall-of-potential method according to IEEE 81. 4. Prepare dimensioned Drawings locating each test well, ground rod and ground- rod assembly, and other grounding electrodes. Identify each by letter in alphabetical order, and key to the record of tests and observations. Include the number of rods driven and their depth at each location and include observations of weather and other phenomena that may affect test results. Describe measures taken to improve test results. B. Grounding system will be considered defective if it does not pass tests and inspections. C. Prepare test and inspection reports. D. Report measured ground resistances that exceed the following values: 1. Power and Lighting Equipment or System with Capacity of 500 kVA to 1000kVA: 5 ohms. E. Excessive Ground Resistance: If resistance to ground exceeds specified values, notify Architect promptly and include recommendations to reduce ground resistance.
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Sources: Architectural and Engineering Services Agreement, Architectural and Engineering Services Agreement