Miller Electric Bobcat 250 manual Selecting Extension Cord Use Shortest Cord Possible

Page 58

13-11. Selecting Extension Cord (Use Shortest Cord Possible)

Cord Lengths for 120 Volt Loads

If unit does not have GFCI receptacles, use GFCI-protected extension cord.

Maximum Allowable Cord Length in ft (m) for Conductor Size (AWG)*

Current

Load (Watts)

4

 

6

 

8

10

12

14

(Amperes)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

600

 

 

 

350

(106)

225 (68)

137

(42)

100 (30)

 

 

 

 

 

 

 

 

 

 

7

840

 

400

(122)

250 (76)

150 (46)

100

(30)

62 (19)

 

 

 

 

 

 

 

 

10

1200

400 (122)

275 (84)

175 (53)

112 (34)

62 (19)

50 (15)

 

 

 

 

 

 

 

 

15

1800

300 (91)

175 (53)

112 (34)

75 (23)

37 (11)

30 (9)

 

 

 

 

 

 

 

 

 

 

20

2400

225 (68)

137 (42)

87

(26)

50 (15)

30

(9)

 

 

 

 

 

 

 

 

 

 

 

25

3000

175 (53)

112 (34)

62

(19)

37 (11)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

3600

150 (46)

87

(26)

50

(15)

37 (11)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

35

4200

125 (38)

75

(23)

50

(15)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

4800

112 (34)

62

(19)

37 (11)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

45

5400

100 (30)

62

(19)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

50

6000

87 (26)

50

(15)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*Conductor size is based on maximum 2% voltage drop

Cord Lengths for 240 Volt Loads

If unit does not have GFCI receptacles, use GFCI-protected extension cord.

Maximum Allowable Cord Length in ft (m) for Conductor Size (AWG)*

Current

Load (Watts)

4

6

 

8

10

12

14

(Amperes)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

1200

 

 

700

(213)

450

(137)

225 (84)

200 (61)

 

 

 

 

 

 

 

 

 

7

1680

 

800 (244)

500

(152)

300 (91)

200 (61)

125 (38)

 

 

 

 

 

 

 

 

 

10

2400

800 (244)

550 (168)

350

(107)

225 (69)

125 (38)

100 (31)

 

 

 

 

 

 

 

 

15

3600

600 (183)

350 (107)

225 (69)

150 (46)

75 (23)

60 (18)

 

 

 

 

 

 

 

 

20

4800

450 (137)

275 (84)

175 (53)

100 (31)

60 (18)

 

 

 

 

 

 

 

 

 

 

25

6000

350 (107)

225 (69)

125 (38)

75

(23)

 

 

 

 

 

 

 

 

 

 

 

30

7000

300 (91)

175 (53)

100 (31)

75

(23)

 

 

 

 

 

 

 

 

 

 

 

35

8400

250 (76)

150 (46)

100 (31)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

9600

225 (69)

125 (38)

75

(23)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

45

10,800

200 (61)

125 (38)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

50

12,000

175 (53)

100 (31)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*Conductor size is based on maximum 2% voltage drop OM-4419 Page 54

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Contents Visit our website at OM-4419File Engine Drive 2007−05From Miller to You Table of Contents 10-3 10-110-2 11-1Electric Shock can kill Symbol UsageArc Welding Hazards HOT Parts can cause severe burnsARC Rays can burn eyes and skin Fumes and Gases can be hazardousBuildup of GAS can injure or kill Welding can cause fire or explosionEngine Hazards Compressed Air HazardsFire or Explosion hazard Welding Wire can cause injuryHOT Parts can cause burns and injury Falling Unit can cause injuryEMF Information Principal Safety StandardsCalifornia Proposition 65 Warnings Radiation can cause interferenceUN Choc Électrique peut tuer Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation Indique des instructions spécifiquesLES Fumées ET LES GAZ peuvent être dangereux DES Pièces Chaudes peuvent provoquer des brûlures gravesLE Soudage peut provoquer un in cendie ou une explosion ’EXPLOSION DE LA Batterie peu LE Bruit peut affecter l’ouïeDES Organes Mobiles peuvent pro voquer des blessures ’AIR Comprimé peut provoquer des blessures LA Chaleur DU Moteur peut pro- voquer un incendieRisque D’INCENDIE OU D’EXPLO- Sion LES Fils DE Soudage peuvent provoquer des blessures LE Surchauffement peut endom- mager le moteur électriqueDES Organes Mobiles peuvent provoquer des blessures ’EMPLOI Excessif peutInformation EMF Proposition californienne 65 AvertissementsPrincipales normes de sécurité En ce qui concerne les implants médicauxWeld, Power, and Engine Specifications − SpecificationsSymbol Definitions − DefinitionsRobin-PoweredUnit 560 lb 254 kg Dimensions, Weights, and Operating AnglesDimensions For Units With Optional Running Gear DimensionsFuel Consumption Robin-Powered Units Fuel Consumption Kohler-Powered UnitsFor CC/DC Mode For CV/DC Mode For CC/AC ModeVolt-Ampere Curves Duty Cycle Generator Power Curve100% Duty Cycle at 250 Amperes − Installation Installing Welding GeneratorOil Check Engine Prestart Checks Robin-Powered Units0000 OilEngine Prestart Checks Kohler-Powered Units Open top service doorConnecting The Battery Connect negative − cable last Installing Exhaust PipeConnecting Or Replacing the Battery + −Stop engine Connecting to Weld Output TerminalsTools Needed Correct Installation Work Weld Output TerminalSelecting Weld Cable Sizes − Operating the Welding Generator Front Panel ControlsLoaded Cold Weather Engine OperationInfrequently Frequently LoadedWork Clamp Electrode Holder Typical Stick Welding Connections And Control SettingsTypical Settings For 7018 1/8 in Electrode Tools Needed 3/4Fine Control, Weld Process switch Settings Quick connector Typical MIG Welding Connections And SettingsSolid Wire Applications Be sure to use the correct size weld cables see SectionSelf-Shielded Flux Core Wire Applications Fine Control, Weld Process switch SettingsWork Typical Settings For 4043Aluminum On 1/8 in Material Lines and may not suit all applications Cables see SectionGenerator Power Receptacles − Operating Auxiliary EquipmentCurrent Available in Amperes 240 Simultaneous Weld And PowerWiring Optional 240 Volt Plug Receptacle200 Routine Maintenance Robin-Powered Units100 500Maintenance Label Robin-Powered Units Overload Protection Robin-Powered Units Servicing Air Cleaner Robin-Powered UnitsStop engine. Disconnect negative − battery cable Stop engine and let cool Oil Fill Oil CheckFull Oil Drain Valve 2 ID x 7 in Hose Oil FilterTurn idle speed screw for fine adjustments Adjusting Engine Speed Robin-Powered UnitsIdle Speed Adjustment Weld/Power Speed AdjustmentServicing Optional Spark Arrestor Robin-Powered Units Material Thickness Reference ChartRoutine Maintenance Kohler-Powered Units Hours Nl Weld Cables ~ Slip Rings Nl Brushes OM-4419Maintenance Label Kohler-Powered Units Servicing Air Cleaner Kohler−Powered Units Close valve and valve cap before adding oil Full Stop engine and let cool Oil Drain Valve2 ID x 7 in Hose Oil Filter Up fuelAdjusting Engine Speed Kohler-Powered Units Turn idle speed screw for fine ad- justmentsOverload Protection Kohler-Powered Units Servicing Optional Spark Arrestor Kohler-Powered UnitsGenerator Power Troubleshooting − TroubleshootingWelding Troubleshooting Trouble RemedyCheck receptacle wiring and connections Engine TroubleshootingCheck fuel level Recommended Spare Parts − Parts ListSwitch S2, and throttle solenoid TS1 Recommended Spare Parts− Electrical Diagrams Circuit Diagram For Welding Generator228 460-A Grounding Generator To Truck Or Trailer Frame − Generator Power GuidelinesSelecting Equipment Electrically Bond GeneratorUse ground device as stated in electrical codes Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Amperes x Volts = WattsIndustrial Motors Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Farm/Home Equipment Rating Starting Watts Running WattsApproximate Power Requirements For Contractor Equipment Contractor Rating Starting Watts Running WattsSingle-Phase Induction Motor Starting Requirements Power Required To Start MotorHow Much Power Can Generator Supply? KVA/HP x HP x 1000 / Volts = Starting AmperageTypical Connections To Supply Standby Power Selecting Extension Cord Use Shortest Cord Possible Weld current starts when electrode touches work- piece Stick Welding Procedure− Stick Welding Smaw Guidelines Striking an Arc − Scratch Start Technique Electrode and Amperage Selection ChartStriking an Arc − Tapping Technique Positioning Electrode Holder Poor Weld Bead CharacteristicsGood Weld Bead Characteristics 10-30 9090Conditions That Affect Weld Bead Shape Electrode Movement During WeldingTee Joint Butt JointsLap Joint Or LessWeld Test Troubleshooting − PorosityTroubleshooting − Excessive Spatter Possible Causes Corrective ActionsTroubleshooting − Lack Of Penetration Troubleshooting − Incomplete FusionTroubleshooting − Excessive Penetration Troubleshooting − Waviness Of Bead Troubleshooting − Burn-ThroughTroubleshooting − Distortion − MIG Welding Gmaw Guidelines Holding And Positioning Welding GunShort Normal Long Push Perpendicular DragSlow Normal Fast Gun Movement During Welding 15-8 Troubleshooting − Porosity 15-7 Troubleshooting − Excessive Spatter15-9 Troubleshooting − Excessive Penetration Fusion between weld metal Lack Of Penetration − shallowImproper joint preparation Unsteady hand Support hand on solid surface or use two hands Application Common MIG Shielding GasesFillet Page Your distributor also gives ServiceSupport For assistance in filing or settling claims, contact To locate a Distributor or Service Agency visitMiller Electric Mfg. Co Your distributor and/or equipment manufacturer’s
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