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Construction Documents <br />20052.02 / Orange County - Justice <br />Facility <br />26 0526 - 3 GROUNDING AND BONDING FOR <br />ELECTRICAL SYSTEMS <br />a.Space electrodes not less than 10 feet (3.0 m) from each other and any other ground <br />electrode until maximum allowed resistance to ground is achieved. <br />b.Where location is not indicated, locate electrode(s) at least 5 feet (1.5 m) outside <br />building perimeter foundation as near as possible to electrical service entrance; where <br />possible, locate in softscape (uncovered) area. <br />6.Provide additional ground electrode(s) as required to achieve specified grounding <br />electrode system resistance. <br />7.Ground Bar: Provide ground bar in main electrical room, separate from service equipment <br />enclosure, for common connection point of grounding electrode system bonding jumpers <br />as permitted in NFPA 70. Connect grounding electrode conductor provided for <br />service-supplied system grounding to this ground bar. <br />a.Ground Bar Size: 1/4" x 2" x 18" unless otherwise indicated or required. <br />b.Where ground bar location is not indicated, locate in accessible location as near as <br />possible to service disconnect enclosure. <br />8.unless otherwise noted. Location as identified on plans. <br />9.Ground Riser: Provide common grounding electrode conductor not less than 3/0 AWG for <br />tap connections to multiple separately derived systems as permitted in NFPA 70. <br />G.Service-Supplied System Grounding: <br />1.For each service disconnect, provide grounding electrode conductor to connect neutral <br />(grounded) service conductor to grounding electrode system. Unless otherwise indicated, <br />make connection at neutral (grounded) bus in service disconnect enclosure. <br />2.For each service disconnect, provide main bonding jumper to connect neutral (grounded) <br />bus to equipment ground bus where not factory-installed. Do not make any other <br />connections between neutral (grounded) conductors and ground on load side of service <br />disconnect. <br />H.Separately Derived System Grounding: <br />1.Separately derived systems include, but are not limited to: <br />a.Transformers. <br />b.Uninterruptible power supplies (UPS), when configured as separately derived <br />systems. <br />c.Generators, when neutral is switched in the transfer switch. <br />2.Provide grounding electrode conductor to connect derived system grounded conductor to <br />nearest effectively grounded metal building frame. Unless otherwise indicated, make <br />connection at neutral (grounded) bus in source enclosure. <br />3.Provide bonding jumper to connect derived system grounded conductor to nearest metal <br />building frame and nearest metal water piping in the area served by the derived system, <br />where not already used as a grounding electrode for the derived system. Make connection <br />at same location as grounding electrode conductor connection. <br />4.Where common grounding electrode conductor ground riser is used for tap connections to <br />multiple separately derived systems, provide bonding jumper to connect the metal building <br />frame and metal water piping in the area served by the derived system to the common <br />grounding electrode conductor. <br />5.Provide system bonding jumper to connect system grounded conductor to equipment <br />ground bus. Make connection at same location as grounding electrode conductor <br />connection. Do not make any other connections between neutral (grounded) conductors <br />and ground on load side of separately derived system disconnect. <br />I.Bonding and Equipment Grounding: <br />1.Provide bonding for equipment grounding conductors, equipment ground busses, metallic <br />equipment enclosures, metallic raceways and boxes, device grounding terminals, and <br />other normally non-current-carrying conductive materials enclosing electrical <br />conductors/equipment or likely to become energized as indicated and in accordance with <br />NFPA 70. <br />2. Provide insulated equipment grounding conductor in each feeder and branch circuit <br />raceway. Do not use raceways as sole equipment grounding conductor. <br />DocuSign Envelope ID: 09980A3B-0691-41B4-854D-3865F2287392