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Construction Documents <br />20052.02 / Orange County - Justice <br />Facility <br />26 0526 - 2 GROUNDING AND BONDING FOR <br />ELECTRICAL SYSTEMS <br />1.07 DELIVERY, STORAGE, AND HANDLING <br />A.Receive, inspect, handle, and store products in accordance with manufacturer's instructions. <br />PART 2 PRODUCTS <br />2.01 GROUNDING AND BONDING REQUIREMENTS <br />A.Existing Work: Where existing grounding and bonding system components are indicated to be <br />reused, they may be reused only where they are free from corrosion, integrity and continuity are <br />verified, and where acceptable to the authority having jurisdiction. <br />B.Do not use products for applications other than as permitted by NFPA 70 and product listing. <br />C.Unless specifically indicated to be excluded, provide all required components, conductors, <br />connectors, conduit, boxes, fittings, supports, accessories, etc. as necessary for a complete <br />grounding and bonding system. <br />D.Where conductor size is not indicated, size to comply with NFPA 70 but not less than applicable <br />minimum size requirements specified. <br />E.Grounding System Resistance: <br />1.Achieve specified grounding system resistance under normally dry conditions unless <br />otherwise approved by Architect. Precipitation within the previous 48 hours does not <br />constitute normally dry conditions. <br />2.Grounding Electrode System: Not greater than 5 ohms to ground, when tested according <br />to IEEE 81 using "fall-of-potential" method. <br />3.Between Grounding Electrode System and Major Electrical Equipment Frames, System <br />Neutral, and Derived Neutral Points: Not greater than 0.5 ohms, when tested using <br />"point-to-point" methods. <br />F.Grounding Electrode System: <br />1.Provide connection to required and supplemental grounding electrodes indicated to form <br />grounding electrode system. <br />a.Provide continuous grounding electrode conductors without splice or joint. <br />b.Install grounding electrode conductors in raceway where exposed to physical <br />damage. Bond grounding electrode conductor to metallic raceways at each end with <br />bonding jumper. <br />2.Metal Underground Water Pipe(s): <br />a.Provide connection to underground metal domestic and fire protection (where <br />present) water service pipe(s) that are in direct contact with earth for at least 10 feet <br />(3.0 m) at an accessible location not more than 5 feet (1.5 m) from the point of <br />entrance to the building. <br />b.Provide bonding jumper(s) around insulating joints/pipes as required to make pipe <br />electrically continuous. <br />c.Provide bonding jumper around water meter of sufficient length to permit removal of <br />meter without disconnecting jumper. <br />3.Metal In-Ground Support Structure: <br />a.Provide connection to metal in-ground support structure that is in direct contact with <br />earth in accordance with NFPA 70. <br />4.Concrete-Encased Electrode: <br />a.Where metallic structural components meet the definition of a concrete encased <br />electrode as defined in NEC 250.52, the concrete encased electrode shall be bonded <br />to the grounding electrode system per NEC 250.50. Coordinate with the structure <br />prior to pouring concrete foundations. <br />b.Provide connection to concrete-encased electrode consisting of not less than 20 feet <br />(6.0 m) of either steel reinforcing bars or bare copper conductor not smaller than 4 <br />AWG embedded within concrete foundation or footing that is in direct contact with <br />earth in accordance with NFPA 70. <br />5.Ground Rod Electrode(s): <br />DocuSign Envelope ID: 09980A3B-0691-41B4-854D-3865F2287392