A. Unless indicated otherwise hereinafter or on the drawings, motors shall be 1800 RPM open drip proof (ODP) type. B. Motors shall operate within plus or minus 10% of nameplate voltage without reduction of performance or life. C. Motors shall have continuous duty classification based on 40 degree C. ambient temperature. Motor service factor shall not be less than 15% unless indicated other wise herein. D. Motors shall be sized for the duty to be performed and shall not be operated in the service factor when the driven equipment is operating at specified capacity. E. Motors shall comply with NEMA MG – 1-2003, Section I, parts 1, 2, 3, 4, Section II, parts 10, 11, 12, 14. F. Motors operating on 120 volt systems shall be rated at 115 volts; motors operating on 208 volt system shall be rated at 200 volts; motors operating on 240 volt system shall be rated at 230 volts; motors operating on 277 volt system shall be rated at 265 volts; motors operating on 480 volt system shall be rated at 460 volts. G. Motor voltage and phase shall be as indicated on the Electrical drawings. H. Motors used with variable frequency drives shall be inverter duty designed to operate with variable frequency drives. Motors shall be approved by the variable frequency drive manufacturer and the motor manufacturer to provide quiet and stable operation over the entire speed range.
