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C. Provide a machine typed circuit directory on inside of panelboard of door breaker <br /> identification when panelboard is delivered to site. Update the panelboard legend at <br /> end of project to reflect as-built conditions. <br /> 2.12 PANELBOARD TRANSFORMER <br /> A. The panelboard transformer shall be ventilated dry type. Voltage, phase and KVA _. <br /> ratings shall be as shown on the Contract One-line drawing.The transformer shall be <br /> as manufactured by G.E. Type QL, Westinghouse, Jefferson, or approved equal. <br /> B. The transformer shall have 115°C rise, insulation 220°C rise class H insulation -- <br /> system. <br /> C. Vibration isolators shall be installed between the transformer and its mounting _ <br /> surface to reduce case vibration and compensate for slight unevenness of the <br /> mount. They shall be sized for the appropriate loading at twice the fundamental <br /> frequency. The Transformer housing shall be securely fastened to the mounting _ <br /> surface to eliminate possible sound generation. <br /> D. The transformer shall be finished with two coats of heavy enamel to resist rust and <br /> corrosion. <br /> E. Transformers that require neutral grounding shall be grounded in accordance with <br /> Article 250-26 N.E.C. and any applicable local ordinances. Protection of the <br /> grounding attachments shall be per N.E.C. 250-117. -- <br /> 2.13 GROUNDING SYSTEM <br /> A. The ground rod shall consist of not less than 10 continuous feet of 3/4-inch copper _ <br /> coated electroplated high grade carbon steel. The ground rod shall be an Eritech <br /> 613400, NEHRING type NCC, Weater 348, or approved equal. <br /> B. Ground clamps shall be bolt-on type as manufactured by ILSCO type AGC, O-Z — <br /> Gedney Type GRC, Burndy Type GAR or GP, or approved equal. <br /> C. All ground rod, pipe, and steel plate and buried bond connections shall be made by <br /> welding process equal to Cadweld. <br /> D. Ground buses shall be provided in all electrical enclosures. Each ground bus shall <br /> be sized as shown on the Contract drawings or specified herein. The ground bus --- <br /> shall be adequately sized for the connection of all grounding conductors required per <br /> NEC. Screw type lugs shall be provided on all ground busses for connection of <br /> grounding conductors. — <br /> E. Each ground bus shall be copper. Screw type fasteners shall be provided on all <br /> ground busses for connection of grounding conductors. Ground bus shall be a <br /> Challenger GB series, ILSCO CAN series, or approved equal. <br /> F. Attachment of the grounding conductor to equipment or enclosures shall be by <br /> connectors specifically provided for grounding. Mounting, support, or bracing bolts <br /> shall not be used as an attachment point for ground conductors. <br /> G. All raceway systems, supports, enclosures,panels,and equipment housings shall be <br /> permanently and effectively grounded. -- <br /> H. One side of the secondary on all transformers shall be grounded. <br /> Division III-207 NEI Phase II Water and Sewer <br /> July 2007 CIP Nos. 7468, 7589, 7590 <br />