Miller Electric 300 P manual Selecting Weld Cable Sizes, 150 ft 200 ft 250 ft, Stop engine before

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5-8. Selecting Weld Cable Sizes*

Weld Cable Size** and Total Cable (Copper) Length in Weld Circuit

Not Exceeding***

100 ft (30 m) or Less

150 ft

200 ft

250 ft

300 ft

350 ft

400 ft

(45 m)

(60 m)

(70 m)

(90 m)

(105 m)

(120 m)

Weld Output

Terminals

Y Stop engine before

Welding

10 − 60%

60 − 100%

connecting to weld out-

Duty

Duty

10 − 100% Duty Cycle

put terminals.

Amperes

Cycle

Cycle

YDo not use worn, dam- aged, undersized, or poorly spliced cables.

	100		4 (20)	4 (20)	4 (20)	3 (30)	2 (35)	1 (50)	1/0 (60)	1/0 (60)

	150		3 (30)	3 (30)	2 (35)	1 (50)	1/0 (60)	2/0 (70)	3/0 (95)	3/0 (95)

	200		3 (30)	2 (35)	1 (50)	1/0 (60)	2/0 (70)	3/0 (95)	4/0 (120)	4/0 (120)

	250		2 (35)	1 (50)	1/0 (60)	2/0 (70)	3/0 (95)	4/0 (120)	2 ea. 2/0	2 ea. 2/0
	250		2 (35)	1 (50)	1/0 (60)	2/0 (70)	3/0 (95)	4/0 (120)	(2x70)	(2x70)
									(2x70)	(2x70)

	300		1 (50)	1/0 (60)	2/0 (70)	3/0 (95)	4/0 (120)	2 ea. 2/0	2 ea. 3/0	2 ea. 3/0
	300		1 (50)	1/0 (60)	2/0 (70)	3/0 (95)	4/0 (120)	(2x70)	(2x95)	(2x95)
								(2x70)	(2x95)	(2x95)

	350		1/0 (60)	2/0 (70)	3/0 (95)	4/0 (120)	2 ea. 2/0	2 ea. 3/0	2 ea. 3/0	2 ea. 4/0
	350		1/0 (60)	2/0 (70)	3/0 (95)	4/0 (120)	(2x70)	(2x95)	(2x95)	(2x120)
							(2x70)	(2x95)	(2x95)	(2x120)

	400		1/0 (60)	2/0 (70)	3/0 (95)	4/0 (120)	2 ea. 2/0	2 ea. 3/0	2 ea. 4/0	2 ea. 4/0
	400		1/0 (60)	2/0 (70)	3/0 (95)	4/0 (120)	(2x70)	(2x95)	(2x120)	(2x120)
							(2x70)	(2x95)	(2x120)	(2x120)

	500		2/0 (70)	3/0 (95)	4/0 (120)	2 ea. 2/0	2 ea. 3/0	2 ea. 4/0	3 ea. 3/0	3 ea. 3/0
	500		2/0 (70)	3/0 (95)	4/0 (120)	(2x70)	(2x95)	(2x120)	(3x95)	(3x95)
						(2x70)	(2x95)	(2x120)	(3x95)	(3x95)

*This chart is a general guideline and may not suit all applications. If cables overheat, use next size larger cable.

**Weld cable size (AWG) is based on either a 4 volts or less drop or a current density of at least 300 circular mils per ampere.
( ) = mm2 for metric use	S-0007-F

***For distances longer than those shown in this guide, call a factory applications representative at 920-735-4505.

Notes

OM-4433 Page 22

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Contents Description OM-4433218 314KProcesses File Engine DriveFrom Miller to You Table of Contents Warranty Symbol Usage Arc Welding HazardsEngine Hazards Compressed Air Hazards EMF Information Principal Safety StandardsCalifornia Proposition 65 Warnings Radiation can cause interferenceUN Choc Électrique peut tuer Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation LES Fumées ET LES GAZ peuvent être dangereuxDES Pièces Chaudes peuvent provoquer des brûlures graves LE Soudage peut provoquer un in- cendie ou une explosionDES Particules Volantes peuvent blesser les yeux LE Bruit peut affecter l’ouïe’EMPLOI Excessif peut LA Chaleur DU Moteur peut pro- voquer un incendie’AIR Comprimé peut provoquer des blessures LE Surchauffement peut endom- mager le moteur électriquePour les moteurs diesel LE Soudage À L’ARC risque de provoquer des interférencesPour les moteurs à essence Boulevard, Rexdale, Ontario, Canada M9W 1R3 téléphoneStd − Definitions− 50 h Std Manufacturer’s Rating Label Symbols And Definitions Dimensions, Weights, And Operating Angles − SpecificationsWeld, Power, And Engine Specifications TIG Mode Stick ModeMIG Mode Volt-Ampere CurvesFuel Consumption Curve shows typical fuel use under weld or power loadsExceeding duty cycle can damage unit and void warranty Duty Cycle And OverheatingAC Generator Power Curve 150 125 100See -2for lifting eye rating See -2for mounting information − InstallationInstalling Welding Generator GroundingMounting Welding Generator Stop engine and let cool Installing Exhaust PipeTools Needed 1/2 Point exhaust pipe in desired diDo not overfill battery cells Activating The Dry Charge Battery If ApplicableConnecting The Battery Close door after connecting batteryFuel Do not use gasoline. Gasoline will damage engine Coolant Recovery TankEngine Prestart Checks OilMIG and Fcaw Welding Connecting To Weld Output TerminalsStick and TIG Welding Stop engine350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m Selecting Weld Cable Sizes150 ft 200 ft 250 ft Stop engine beforeConnecting To Remote 14 Receptacle RC14 Socket Information− Operating Welding Generator Front Panel Controls See SectionDescription Of Front Panel Controls See Section Process/Contactor Switch Process/Contactor Switch SettingsDo not Strike Like a Match Lift-ArcStart ProcedureLift-Arc Start Method Touch Lift-Arc t TIGRemote Voltage/Amperage Control At least once a month, run engine at Generator Power Receptacles− Operating Auxiliary Equipment − Maintenance & Troubleshooting Routine MaintenanceMaintenance Label To clean air filter Servicing Air CleanerBy the warranty Do not clean housing with air hoseServicing Engine Cooling System Inspecting And Cleaning Optional Spark Arrestor MufflerStop engine and let cool. Reinstall cleanout plug Do not set engine speed higher Adjusting Engine Speed On Standard ModelsMaximum Stop engine. Close doorEngine Speed No Load Engine Speed AdjustmentWeld/Power Speed Adjust- ment Rpm max 62.6 Hz 1250 rpm 41.6 HzTo replace primary canister fuel filter Servicing Fuel And Lubrication SystemsTo change oil and filter To drain water from fuel systemOverload Protection Checking Generator Brushes Replace Damaged BrushesHelp 25 Display Voltmeter/Ammeter Help DisplaysHelp 20 Display Troubleshooting WeldingGenerator Power EngineCheck for obstructed throttle solenoid Material Thickness Reference Chart − Electrical Diagrams Circuit Diagram For Welding Generator219 228−D Welding Generator − RUN-IN ProcedureWetstacking Stop engine Do not touch hot exhaust Run-In Procedure Using Load BankProcedure at less than From flammables Do not PerformFrom flammables Run-In Procedure Using Resistance GridBank/grid Do not perform run-inSelecting Equipment − Generator Power GuidelinesHas this symbol Grounding Generator To Truck Or Trailer FrameEarth ground if supplying Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Use ground device as stated Electrical codesIndustrial 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 = Starting AmperageTypical Connections To Supply Standby Power Selecting Extension Cord Use Shortest Cord Possible Current Load Watts Amperes108 -2 107 101 102 103 100 104 106 105 − Parts List109 81 Fig 7372 71 67 66 65 PC3 Dia Part Description Quantity Mkgs Batt Panel, Front w/Components Panel, Front w/Components -1ItemFUEL/HM Control Panel Generator Rectifier Assembly Wiring Harnesses Support ServiceYour distributor also gives 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