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• Boeing 40-31 Phase 1 July 12,2012 <br /> Drive Service Factor <br /> � The drives shall be constant speed with fixed-pitch sheaves. The drives shall be selected at a minimum 20 percent <br /> larger than the motor brake horsepower(1.2 service factor). <br /> Motor Wiring Conduit <br /> The fan motor wiring shall be factory-wired to the unit-mounted starteddisconnect,variable frequency drive,or external <br /> motorjunction box within flexible metal conduit of adequate length so that the fan vibration isolation will not be restricted. <br /> Refer to the Product Data section for fans with motor wiring conduit. <br /> External Motor Junction Box <br /> The fan section shall have motor leads extended to a factory-installed NEMA 4 external junction box to facilitate motor <br /> wiring and to maintain air leakage integrity of the casing. Refer to the Product Data section for fans with an external <br /> motorjunction box. <br /> FLD=Furnished by Trane U.S.lnc.d6a Trane/ Equipment Submittal Page 9 of 26 <br /> lnstalled by Others <br />