Laserfiche WebLink
6. The switch shall be fully rated at amperage as shown on Contract Drawing, <br /> when mounted in switchboard/pedestal, for switching all types of loads, <br /> including induction motors, at the specified amperage and voltage. <br /> 7. Switches that are not rated for continuous duty, repetitive switching of all types <br /> of loads or transfer between two active power sources, are not acceptable. <br /> 8. The main power contacts shall have silver alloy construction with wiping action <br /> and shall be protected by arc chutes or arcing contacts. <br /> 9. The main contact design shall allow repeated making and breaking of full load <br /> current, in a combination of motor and other loads, without damage to the <br /> main contacts. <br /> 10. All main power contacts and auxiliary contacts shall be mechanically attached <br /> to a common actuator shaft. <br /> 11. The operating transfer time shall be adjustable time delayed open transition <br /> type with intentional load disconnect position for an adjustable period of time <br /> when transferring from Source 1 to Source 2 or from Source 2 to Source 1. <br /> 12. Silver plated copper shall be used in the construction of the bus work. <br /> 13. Inspection of all contacts (movable and stationary)linkages and moving parts <br /> shall be possible from the front of the switch without disassembly of operating <br /> linkages and without disconnection of power conductors. <br /> 14. All switch and relay contacts, coils, mechanical linkages, and control eiements <br /> shall be serviceable or removable from the front of the mounted switch and <br /> accessory assembly without removal of the switch or assembly from the <br /> compartment and without disconnection of the power cables or control wiring. <br /> 15. The switch shall have a manual operating handle for maintenance purposes. <br /> 16. Screw type solderless terminals or lugs shall be provided for connecting all <br /> external line & load power cables and control wiring. All connections shall be <br /> accessible from the front without removal of internal components. <br /> 17. A terminal strip shall be provided for terminating all control wiring. Number all <br /> terminals with machine printed lettering matching the wire number of the <br /> terminated wire. <br /> 18. All control wiring shall have permanent identification at each point of <br /> connection. Wire identification shall be by machine printed numbered wiring <br /> sleeves. Electrically common wires shall have the same wire number. <br /> Electrically different wiring shall have unique wire numbers. <br /> 19. Control wiring shall be neatly bundled and secured in place by plastic cable <br /> ties. Wiring shall be protected with plastic spiral wrap where it is subject to <br /> mechanical damage or crosses over to a hinged door. <br /> 20. The switch assembly shall be in a enclosure as shown on Contract E-Series <br /> Drawings. <br /> 21. The automatic transfer switch shall be an ASCO Model 7000 with options to <br /> meet specified requirements, or approved equal. <br /> July 2007 Division III-204 NEI Phase II Water and Sewer <br /> CIP Nos. 7468, 7589, 7590 <br />