Hobart Welding Products OM-240 438E guide

12-11. 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)	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)	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-240 438 Page 50

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Hobart Welding Products OM-240 438E manual Selecting Extension Cord Use Shortest Cord Possible

Contents

OM-240 438E ProcessesDescription From Hobart to You Protect Your Investment Table of Contents 10-1 Electric Shock can kill Symbol UsageArc Welding Hazards HOT Parts can burn ARC Rays can burn eyes and skin Fumes and Gases can be hazardousBuildup of GAS can injure or kill Welding can cause fire or explosion Engine Hazards Hydraulic Equipment can injure or kill Hydraulic HazardsCompressed Air Hazards Hydraulic Fluid can injure or kill Overheating can damage motors Compressed AIR can injure or killFire or Explosion hazard Falling Equipment can injure California Proposition 65 Warnings Principal Safety Standards EMF InformationAbout Implanted Medical Devices UN Choc Électrique peut tuer Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation Indique des instructions spécifiques LE Soudage peut provoquer un incendie ou une explosion LES Pièces Chaudes peuvent provoquer des brûluresLES Fumées ET LES GAZ peu- vent être dangereux LE Bruit peut affecter l’ouïe ’EXPLOSION DE LA Batterie peut provoquer des blessures Les Pièces Mobiles peuvent causer des blessures LES Étincelles À L’ÉCHAPPEMENT peuvent provoquer un incendie LA Chaleur DU Moteur peut pro- voquer un incendie Lire LES Instructions LE Surchauffement peut endommager le moteur électrique Risque D’INCENDIE OULA Chute DE L’ÉQUIPEMENT peut provoquer des blessures LES Étincelles Projetées peuvent provoquer des blessures Proposition californienne 65 Avertissements UNE Remorque QUI Bascule peut provoquer des blessuresLE Soudage À L’ARC risque de provoquer des interférences Principales normes de sécurité Informations relatives aux CEMEn ce qui concerne les implants médicaux Weld, Power, and Engine Specifications − SpecificationsSymbol Definitions − Definitions Dimensions, Weights, And Operating Angles Weight 562 lb 254 kg Duty Cycle Dimensions For Units With Optional Running GearDimensions Duty Cycle For CC/AC Mode For CC/DC ModeVolt-Ampere Curves Generator Power Curve Fuel Consumption Serial Number And Rating Label Location − InstallationInstalling Welding Generator Movement Location / Airflow Clearance Grounding Generator To Truck Or Trailer Frame GND/PE Engine Prestart Checks Oil Connect negative − battery cable last Installing Exhaust PipeConnecting Or Replacing the Battery + − Connecting To Weld Output Terminals Stop engine Failure to properly connectTools Needed 3/4 350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m Selecting Weld Cable Sizes150 ft 200 ft 250 ft 100 150 200 250 Start Your Professional Welding Career Now Front Panel Controls Engine Control Switch− Operating the Welding Generator Fine Control Loaded Cold Weather Engine OperationInfrequently Frequently Loaded Typical Stick Welding Connections And Control Settings Stop engineElectrode Gfci Receptacle Option − Operating Auxiliary EquipmentStandard Receptacles At least once a month, run engine at Current Available in Amperes 240 Simultaneous Weld And PowerWiring Optional 240 Volt Plug Receptacle − Maintenance Maintenance Label 200 Routine Maintenance100 500 Servicing Air Cleaner Close valve and valve cap Changing Engine Oil, Oil Filter, and Fuel FilterStop engine and let cool Before Adding Oil Running engine Weld/Power Speed Adjustment Adjusting Engine SpeedIdle Speed Adjustment Turn idle speed screw for fine ad- justments Servicing Optional Spark Arrestor Stop engine. Disconnect negative − battery cableOverload Protection Fuse F1 See Section Generator Power Troubleshooting − TroubleshootingWelding Troubleshooting Trouble Remedy Ers SR2 and SR3 Engine TroubleshootingCheck receptacle wiring and connections Check fuel level Recommended Spare Parts − Parts ListControl switch S2, and throttle solenoid TS1 Recommended Spare Parts − Electrical Diagrams Circuit Diagram For Welding Generator 240 424-B − Generator Power Guidelines Selecting Equipment Use ground device as stated Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Electrical codes Industrial 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 Watts Approximate Power Requirements For Contractor Equipment Contractor Rating Starting Watts Running Watts Single-Phase Induction Motor Starting Requirements Power Required To Start MotorHow Much Power Can Generator Supply? KVA/HP x HP x 1000 / Volts = Starting Amperage Typical Connections To Supply Standby Power Selecting Extension Cord Use Shortest Cord Possible Weld current starts when Stick Welding Procedure− Stick Welding Smaw Guidelines Electrode touches work Scratch Technique Electrode and Amperage Selection ChartStriking an Arc Tapping Technique Positioning Electrode Holder Poor Weld Bead CharacteristicsGood Weld Bead Characteristics End View Of Work Angle Side View Of Electrode Angle 10-30 Electrode Angle Conditions That Affect Weld Bead ShapeElectrode Movement During Welding Normal Tee Joint Groove Butt JointsLap Joint Or Less Possible Causes Corrective Actions TroubleshootingWeld Test Weld bead Metal remains Lack of Penetration Good PenetrationGood Penetration Excessive Penetration Direction SOCKET/WRENCH Selection Table Standard Metric Service SupportAssistance Contact your Distributor for Hobart Welding Products