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G. All motors 50 h.p. or smaller which will be installed outdoors shall be totallyenclosed fan cooled <br /> (TEFC) . All motors larger than 50 h.p. and up to 300 h.p. which will be installed outdoors shall <br /> be Weather-Protected Type I . All motors larger than 50 h.p . shall have a minimum 2 cycles of <br /> solid, baked epoxy vacuum impregnation . In addition, these motors shall be provided with <br /> rodent screens . Enclosures shall have stainless steel vent screens . Provide a 200 watt, minimum <br /> space heater for the windings . <br /> H . Unless otherwise specified , all motors which will be installed indoors shall be totally enclosed , fan <br /> cooled (TEFC) . All motors larger than 50 h . p . located in damp environments such as in pump and <br /> pipe galleries , tunnels , chemical feed and sludge areas, shall have 2 cycles of solid baked epoxy <br /> vacuum impregnation . <br /> I . Motors with a nameplate rating of 5 h.p . and above shall be " high efficiency" units . Such motors <br /> shall have efficiencies determined by the test as set forth in ANSMEEE 112 , Method B . <br /> J . Efficiency index, nominal efficiency, and minimum efficiency shall be defined in accordance <br /> with ANSUNEMA MG 1 - 12 . 53 .b; these values shall be stated in the Shop Drawing submittal . <br /> Motor nameplate data shall include the nominal efficiency value . <br /> K . Motors in the range of 1 h.p . to 150 h.p . , inclusive, shall be designed specifically for energy <br /> efficiency and high power factor. In accordance with NEMA Standard MG 1 - 12 . 53b, each motor <br /> shall meet the minimum guaranteed efficiency for the specified nameplate efficiency. All motor <br /> efficiency tests shall be performed utilizing the NEMA preferred test method IEEE 112 method <br /> B , Dynamometer. All tests shall be performed in accordance with the procedures contained in <br /> i NEMA Standard MG 1 - 12 . 53 . <br /> L. Motors larger than 150 h.p . shall have a minimum efficiency, at full load, of 95 percent and a <br /> minimum power factor of 85 percent. <br /> M. Condition of Service: All motors shall meet the following conditions of service, and other <br /> conditions as required on the Drawings : <br /> 1 . Continuous duty. <br /> 2 . Altitude (below 3300) feet . <br /> 3 . Ambient temperatures (0) to (40) degrees C . <br /> J 4 . Voltage variation plus or minus 10 percent (unless VFD controlled) . <br /> 1 5 . Frequency variation plus or minus 5 percent (unless VFD controlled) . <br /> J 6 . Combined voltage and frequency variation plus or minus 10 percent Frequency <br /> variation not to exceed plus or minus 5 percent (unless VFD controlled). <br /> 7 . Across-the4ine starting. <br /> 8 . VFD Control, as required. <br /> 1 <br /> 044572017 <br /> 16490 - 5 <br />