Miller Electric CST 250 VRD Weld Output Terminals And Selecting Cable Sizes, 150 ft 200 ft 250 ft

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3-6. Weld Output Terminals And Selecting 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
		100 ft (30 m) Or Less		(45 m)	(60 m)	(70 m)	(90 m)	(105 m)	(120 m)
				(45 m)	(60 m)	(70 m)	(90 m)	(105 m)	(120 m)
Weld Output	Welding	10 − 60%	60 − 100%
Weld Output	Welding	Duty	Duty			10 − 100% Duty Cycle
Terminals	Amperes***	Duty	Duty			10 − 100% Duty Cycle
Terminals	Amperes***	Cycle	Cycle
		Cycle	Cycle
	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
Output Receptacles							(2x70)	(2x95)	(2x95)

*This chart is a general guideline and may not suit all applications. If cable overheating occurs (normally you can smell it), 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
***Select weld cable size for pulsing application at peak amperage value.	S-0007-E−803 080

OM-220 812 Page 13

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Contents Description OM-220 812BProcesses From Miller to You Table of Contents Page Marks a special safety message Symbol UsageArc Welding Hazards Electric Shock can killWelding can cause fire or explosion ARC Rays can burn eyes and skinFlying Metal can injure eyes Buildup of GAS can injure or killCalifornia Proposition 65 Warnings About Pacemakers Principal Safety StandardsEMF Information − Consignes DE Sécurité − À Lire Avant Utilisation Signification des symbolesLES Décharges Électriques peuvent être mortelles LES Fumées ET LES GAZ peuvent être dangereuxLES Particules Projetées peu- vent blesser les yeux LE Soudage peut causer un incen- die ou une explosionLES Pièces Chaudes peuvent cau- ser des brûlures graves LE Bruit peut affecter l’ouïeLA Chute DE L’APPAREIL peut blesser Risque D’INCENDIE OU D’EXPLO’EMPLOI Excessif peut Faire LES Pièces Mobiles peuvent cau- ser des blessuresConsignes relatives aux stimulateurs cardiaques Principales normes de sécuritéInformation sur les champs électromagnétiques Duty Cycle And Overheating − InstallationSpecifications DC Amps Stick Smaw Volt-Ampere CurvesTIG Gtaw Volt-Ampere Curve Location And Airflow Dimensions And WeightSelecting a Location 150 ft 200 ft 250 ft Weld Output Terminals And Selecting Cable Sizes350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m Terminals AmperesPositive + Weld Output Terminal 50/60 Hz Single-Phase 50/60 Hz Three-Phase Electrical Service GuideStick Dcep Direct Current Electrode Positive Connections Input VoltageSelecting 220 Volts AC Single/Three Phase Input Voltage Relinking Board Connection For 400 440 VAC Input Power Selecting 400 440 Volts AC Three Phase Input VoltageFor three-phase operation Connecting Input PowerFor single-phase operation = GND/PEControls − OperationLift-ArctTIG Normal Process Select ControlLift-ArcStart Procedure Stick Start Procedure − Scratch Start TechniqueLift-Arc Start ApplicationRemote 14 Receptacle Information Amp Adjust ControlFan-On-Demand Rack MountingRoutine Maintenance − Maintenance and TroubleshootingBlowing Out Inside Of Unit MonthsTrouble Possible Causes Remedy TroubleshootingUse proper size and type of weld cable see Section Circuit Diagram − Electrical DiagramsSelecting Tungsten Electrode Safety Information About Tungsten− Selecting and Preparing Tungsten Electrode Tungsten Electrode OM-220 812 Main Assembly − Parts ListCAPACITOR,ELCTLT 2400 UF 500 VDC can 2.5 DIA Panel, Front w/Components Panel, Rear w/Components Magnetics Subassembly Heat Sink Assembly, Output Diode Base Assembly Heat Sink Assembly, Input Page Support ServiceMiller Electric Mfg. Co Owner’s Record