Miller Electric 140 Work Cable Routing Inside Unit, Process/Polarity Table, Changing Polarity

.A complete Parts List is available on-line at www.MillerWelds.com

4-3. Work Cable Routing Inside Unit

2

1Work Cable

2Output Terminal Block

Insert work cable through opening in front panel and route along back of front panel to output terminal block.

1Close door.

			Ref. 802 982-A
4-4. Process/Polarity Table
Process	Polarity	Cable Connections
		Cable To Gun	Cable To Work
GMAW − Solid wire with shield-	DCEP − Reverse polarity	Connect to positive (+) out-	Connect to negative (−) output
ing gas		put terminal	terminal
FCAW − Self-shielding wire −	DCEN − Straight Polarity	Connect to negative (−)	Connect to positive (+) output
no shielding gas		output terminal	terminal

4-5. Changing Polarity

1

.Connection hardware must be tightened with proper tools. Do not just hand tighten hardware. A loose electrical connection will cause poor weld performance and excessive heating at the terminal block.

C H A N G IN G P O L A R IT Y

DCEP	DCEN
ElectrodePOSITIVEPositive	Electrode Negative
FOR SOLID WIRE	Flux Core Wire
WorkClamp	WorkClamp
Lead
	Lead

2

Wire Drive	Wire Drive
Lead	Lead

1Lead Connections For Direct Current Electrode Positive (DCEP)

2Lead Connections For Direct Current Electrode Negative (DCEN)

Always read and follow wire manufacturer’s recommended polarity, and see Section 4-4.

Close door.

Ref. 203 501 / Ref. 802 982-

OM-225 311 Page 13