Transcription of Determining the right size generator - John Deere US
1 Determining the right size generatorTo select an engine-driven generator , you llneed to determine the power (kilowatt)requirements which must be met underoperating the generator can be avoided by considering all of the loads that will beconnected to the generator , and by deter-mining the starting requirements (motorstart) of electric motor-operated sure the generator you select is largeenough to handle your present requirementsand anticipated determine the right size generator , addup the total watts of all lights, appliances, tools, or other equipment to be connected tothe the nameplates to determine wattage is not shown, but amps and voltsare given, the following simplified formulamay be used:Amps x Volts = Watts(Ex.)
2 Amps x 120 volts = 1,500 watts)To determine kilowatts (kW), use thefollowing formula:1,000 Watts = 1 Kilowatt(Ex. 1,500 Watts/1,000 = kW)Charts 1, 2, and 3shown will help youin selecting the proper size generator . WithEquipmentWattageAir conditioner,10,000-Btu2,000 3,000 Blanket,electric150 Broiler1,400 Clothes dryer,electric5,000 10,000 Coffee maker850 Dishwasher1,500 2,500 Fan,attic375 Fan,furnace800 1,200 Fan,window200 Freezer,food 300 500 Heater,radiant1,300 Hot plate1,250 Refrigerator/freezer600 2,000 Sump pump400 3,000 Toaster1,100 1,700TV,color100 350 Water heater3,000 4,500 Water pump1,000 3,000 EquipmentWattageBlower,electric1 2 3 hpCompressors1 4 3 hpConcrete vibrators,3 4-hp840 Concrete vibrators,1-hp1,080 Concrete vibrators,2-hp1,560 Concrete vibrators,3-hp2.
3 400 Drain cleaners250 Drills,1 600 Drills,3 600 Drills,1 1,200 Drills, ,000 Grinders,bench1 4 1 hpGrinders,portable1,000 2,500 Hammers,demolition1,260 Hammers,rotary1,200 Heaters,space1 4 2 hpLightscheck wattage on bulbEquipmentWattagePump,electric1 2hp and upRouters900 1,100 Sanders,belt600 1,500 Sanders,disc1,200 Sanders,orbital250 Saws,chain800 1,500 Saws,circular, ,000 2,500 Saws,cutoff2,500 Saws,jig200 800 Saws,masonry2 5 hpSaws,radial arm1 5 hpSaws,table1 3 hpScrewdrivers550 Shears,metal-cutting750 Wrenches,impact,1 ,impact,3 ,impact, ,200 Chart 3:Motor starting requirementsWatts required to start motorRunningRepulsionSplit Motor (hp)wattsinductionCapacitorphase1 82756008501,2001 62756008502,0501 44008501,0502,4001 34509751,3502,7001 26001,3001,8003,6003 48501,9002,600 11,1002,5003,300 Chart 4.
4 Insulated copper wire sizeLoad in wattsMaximum allowable cable lengthCurrentatatin120240#4#6#8#10#12#14 #16# 1, ,200 ,800 ,2002,400 ,8003,60065040026516510050 ,4004,80050030020012580 ,0006,000400250150100 ,6007,200325200125 ,2008,400275175100 ,8009,600250150 ,40010,800225 ,00012,000200 lights, heaters, and small appliances, simplyadd the nameplate ratings or see Chart 1 foraverage wattage requirements. For portableelectric tools and equipment, check thenameplate rating or use Chart 2 for averagerequirements. If watts and/or amps are notgiven and only the horsepower is shown,use Chart 3 to determine the starting andrunning 4is furnished as a guide for select-ing the proper size of insulated copper wirewhen extension cables are used.
5 We recom-mend the use of outdoor-rated ( ) cable,recognized type 1: Home applications approximate wattage requirementsChart 2: Portable electric tools approximate wattage requirementsThese are suggested guidelines only, please contact a qualifiedelectrician or licensed contractor for.
