Miller Electric CST 250 VRD manual Stick Dcep Direct Current Electrode Positive Connections

3-8. Stick DCEP (Direct Current Electrode Positive) Connections

1 Negative (−) Weld Output Terminal

Connect work lead to negative weld output terminal.

2 Positive (+) Weld Output Terminal

Connect electrode holder to positive weld output terminal.

2

1

Ref. 802 888 / Ref. 803 080

3-9. Electrical Service Guide

YCAUTION: INCORRECT INPUT POWER can damage this welding power source. This welding power source requires a CONTINUOUS supply of 50/60 Hz power at +10% of rated input voltage. Do not use a generator with automatic idle device (that idles engine when no load is sensed) to supply input power to this welding power source.

NOTE

Actual input voltage cannot exceed ± 10% of indicated required input voltage. If actual input voltage is outside of this range, no output is available.

	50/60 Hz Single-Phase,	50/60 Hz Three-Phase,
	50% Duty Cycle	50% Duty Cycle
Input Voltage	220	220	400	440
Input Amperes At Rated Output	45	32	18	16
Max Recommended Standard Fuse Rating In Amperes 1
Time-Delay 2	50	40	20	20
Normal Operating 3	70	50	25	25
Min Input Conductor Size In AWG/Kcmil	8	10	14	14
Max Recommended Input Conductor Length In Feet (Meters)	129 (39)	132 (40)	174 (53)	210 (64)
Min Grounding Conductor Size In AWG/Kcmil	8	10	14	14

Reference: 2002 National Electrical Code (NEC)

1Choose a circuit breaker with time-current curves comparable to a Time Delay Fuse.

2“Time-Delay” fuses are UL class “RK5” .

3“Normal Operating” (general purpose − no intentional delay) fuses are UL class “K5” (up to and including 60 amp), and UL class “H” ( 65 amp and above).

YCaution: Failure to follow these fuse and circuit breaker recommendations could create an electric shock or fire hazard.

OM-220 812 Page 15