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ST. BARBARA CATHOLIC SCHOOL TASK 2 75-24272-01 <br />DIOCESE OF ORANGE SEPTEMBER 12TH, 2024 <br />SANTA ANA, CA BID & PERMIT SET <br /> <br />GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS 260526 - 5 <br />D. Water Heater: Install a separate insulated equipment grounding conductor to each electric water <br />heater. Bond conductor to heater units, piping, connected equipment, and components. <br />E. Isolated Grounding Receptacle Circuits: Install an insulated equipment grounding conductor <br />connected to the receptacle grounding terminal. Isolate conductor from raceway and from <br />panelboard grounding terminals. Terminate at equipment grounding conductor terminal of the <br />applicable derived system or service, unless otherwise indicated. <br />F. Isolated Equipment Enclosure Circuits: For designated equipment supplied by a branch circuit <br />or feeder, isolate equipment enclosure from supply circuit raceway with a nonmetallic raceway <br />fitting listed for the purpose. Install fitting where raceway enters enclosure, and install a <br />separate insulated equipment grounding conductor. Isolate conductor from raceway and from <br />panelboard grounding terminals. Terminate at equipment grounding conductor terminal of the <br />applicable derived system or service, unless otherwise indicated. <br />G. Signal and Communication Equipment: For telephone, alarm, voice and data, and other <br />communication equipment, provide No. 4 AWG minimum insulated grounding conductor in ¾” <br />(19mm) raceway from grounding electrode system to each service location, terminal cabinet, <br />wiring closet, and central equipment location. <br />1. Service and Central Equipment Locations and Wiring Closets: Terminate grounding <br />conductor on a 1/4-by-2-by-12-inch grounding bus. <br />2. Terminal Cabinets: Terminate grounding conductor on cabinet grounding terminal. <br />H. Metal Poles Supporting Outdoor Lighting Fixtures: Install grounding electrode and a separate <br />insulated equipment grounding conductor in addition to grounding conductor installed with <br />branch-circuit conductors. <br />3.4 INSTALLATION <br />A. Grounding Conductors: Route along shortest and straightest paths possible, unless otherwise <br />indicated or required by Code. Avoid obstructing access or placing conductors where they may <br />be subjected to strain, impact, or damage. <br />B. Common Ground Bonding with Lightning Protection System: Comply with NFPA 780 and <br />UL 96 when interconnecting with lightning protection system. Bond electrical power system <br />ground directly to lightning protection system grounding conductor at closest point to electrical <br />service grounding electrode. Use bonding conductor sized same as system grounding electrode <br />conductor, and install in conduit. <br />C. Ground Rods: Drive rods until tops are 2 inches below finished floor or final grade, unless <br />otherwise indicated. <br />1. Interconnect ground rods with grounding electrode conductor below grade and as <br />otherwise indicated. Make connections without exposing steel or damaging coating, if <br />any. <br />2. For grounding electrode system, install at least three rods spaced at least one-rod length <br />from each other and located at least the same distance from other grounding electrodes, <br />and connect to the service grounding electrode conductor.