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City of Everett 26 05 26 - 6 <br /> Inductive Charging Infrastructure for Everett Transit <br /> 2. Underground Connections: Welded connectors except at test wells and as <br /> otherwise indicated. <br /> 3. Connections to Ground Rods at Test Wells: Bolted connectors. <br /> 4. Connections to Structural Steel: Welded connectors. <br /> 3.3 INSTALLATION OF GROUNDING AND BONDING <br /> A. Comply with manufacturer's published instructions. <br /> B. Reference Standards: <br /> 1. Ground Bonding Common with Lightning Protection System: Comply with <br /> NFPA 780 and UL 96 when interconnecting with lightning protection system. <br /> Bond electrical power system ground directly to lightning protection system <br /> grounding conductor at closest point to electrical service grounding electrode. <br /> Use bonding conductor sized same as system grounding electrode conductor, <br /> and install in conduit. <br /> 2. Consult Architect for resolution of conflicting requirements. <br /> C. Special Techniques: <br /> 1. Grounding and Bonding Conductors: <br /> a. Route along shortest and straightest paths possible unless otherwise <br /> indicated or required by Code. Avoid obstructing access or placing <br /> conductors where they may be subjected to strain, impact, or damage. <br /> b. Underground Grounding Conductors: <br /> 1) Bury at least 30 inches below grade. <br /> 2) Duct-Bank Grounding Conductor: Bury 12 inches above duct bank <br /> when indicated as part of duct-bank installation. <br /> 2. Grounding and Bonding Connectors: Make connections so possibility of galvanic <br /> action or electrolysis is minimized. Select connectors, connection hardware, <br /> conductors, and connection methods so metals in direct contact are galvanically <br /> compatible. <br /> a. Use electroplated or hot-tin-coated materials to ensure high conductivity <br /> and to make contact points closer in order of galvanic series. <br /> b. Make connections with clean, bare metal at points of contact. <br /> c. Make aluminum-to-steel connections with stainless steel separators and <br /> mechanical clamps. <br /> d. Make aluminum-to-galvanized-steel connections with tin-plated copper <br /> jumpers and mechanical clamps. <br /> e. Coat and seal connections having dissimilar metals with inert material to <br /> prevent future penetration of moisture to contact surfaces. <br /> f. Bonding Straps and Jumpers: Install in locations accessible for inspection <br /> and maintenance except, where routed through short lengths of conduit. <br /> 1) Bonding to Structure: Bond straps directly to basic structure, taking <br /> care not to penetrate adjacent parts. <br /> 26 05 26 - 6 GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS <br />