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2.14 <br /> <br /> A. <br /> <br /> B. <br /> <br />Co <br /> <br />2.15 <br /> <br /> A. <br /> <br />CONTACTORANDRELAYS <br /> <br />Contactors and relays shall have rating as indicated on Drawings. <br /> <br />Verify coil voltages for relays and contactors in order to comply with control voltage <br />indicated. <br /> <br />Provide NEMA~ 1 enclosures for indoor mounted relays where not indicated to be <br />installed in a panelboard, motor control center or similar product. Provide NEMA 3R <br />enclosures for exterior mounted relays. <br /> <br />MOTOR CONTROLLERS <br /> <br />This Specification describes the electrical work related to manual motor switches, <br />manual motor starters and magnetic motor starters. <br /> <br />Provide motor controllers specified or indicated, unless noted or specified as furnished <br />under another section of the Specifications, or from some other specified source. <br /> <br />Provide motor switches and starters having quick make, quick break mechanisms, with <br />enclosures having provisions to permit padlocking starter in "off" positions. Equip <br />each pole of starters with an interchangeable thermal actuated overload element <br />arranged to trip all poles open if any pole is overloaded. Size of overload elements for <br />the motor load controlled. Provide NEMA-I enclosure for indoor and NEMA-3R for <br />outdoor, unless otherwise indicated. <br /> <br />Fractional horsepower manual starters shall consist of a manually-operated toggle- <br />switch and equipped with overload relay. Relay shall be of bi-metal construction and <br />be interchangeable. Starter shall be inoperative should terminal unit be removed. <br /> <br />Magnetic motor starters: Starters for motors over 25 HP shall be current reducing type. <br />Unless otherwise indicated, provide nonreversing, full voltage across-the-line <br />mechanisms. <br /> <br />Provide starter sizes as indicated or required but not smaller than NEMA size 1. Equip <br />with not less than two sets of reversible auxiliary contacts and control transformer. <br /> <br />Provide pilot lights and control devices as indicated, operable at front of enclosure <br />without opening enclosure. Where not otherwise indicated, equip magnetic starters <br />with hand-off-auto selector switches for automatic devices. Where local control is <br />indicated, equip magnetic starters with stop-start push button stations. Buttons, <br />switches, pilot lights are to be interchangeable in mounting. <br /> <br />BASIC MATERIALS AND METHODS 16050-11 <br /> <br /> <br />