Lincoln Electric IM823-A manual Weld Cable Connections, Electrode Connection, Work Connection

A-3 INSTALLATION A-3

WELD CABLE CONNECTIONS

WARNING

ELECTRIC SHOCK CAN KILL.

• Only a qualified electrician should connect the electrode leads to the LN™-15. Connections should be made in accordance with all local and national electrical codes. Failure to do so may result in bodi- ly injury or death.

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The size of the electrode cable and work cable must be sufficient for the maximum weld current and total cable length used.

To avoid interference problems with other equipment and to achieve the best possible operation, route all cables directly to the work or wire feeder. Avoid excessive lengths and do not coil excess cable. Be sure the connection to the work makes tight metal-to- metal electrical contact. (See Table A.1)

TABLE A.1

Weld Current		Total Cable Length
60% Duty	(electrode cable + work cable)
Cycle	50 - 100'	100 - 150'	150 - 200'	200 - 250'
	(15-30 m)	(30 - 46m)	(46 - 61m)	(61m - 76m)
200 Amps	2 AWG	2 AWG	1 AWG	1/0
300 Amps	1 AWG	1 AWG	1/0	2/0
400 Amps	2/0	2/0	3/0	3/0

ELECTRODE CONNECTION

Route the electrode cable through the strain relief in the rear of the case. Connect the electrode cable to the LN™-15 input stud using the mounting hardware provided. Secure the cable by tightening the strain relief.

All domestic models are supplied with pigtail for cus- tomers that prefer to make a taped and bolted con- nection externally. CE models have a male twist con- nector for the electrode connection.

WORK CONNECTION

Connect a work lead of sufficient size between the proper output stud on the power source and the work. Be sure the connection to the work makes tight metal to metal electrical contact. Poor work lead connec- tions can result in poor welding performance.

CAUTION

To prevent possible damage to the LN™-15, do not connect the LN™-15 to non-Lincoln TIG or square wave power sources. TIG high frequency should never be applied to the LN™-15.

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ENGINE DRIVE POWER SOURCE CONNECTION

The LN™-15 has an internal contactor and the elec- trode is not energized until the gun trigger is closed. When the gun trigger is closed the wire will begin to feed and the welding process is started.

1.Shut the welder off.

2.For electrode Positive polarity welding, connect the electrode cable to the "+" terminal of the welder and work cable to the "-" terminal of the welder. For Electrode Negative welding, connect the electrode cable to the "-" terminal of the welder and work cable to the "+" terminal of the welder.

3.Attach the work clip lead from the front of the LN™- 15 to work using the spring clip at the end of the lead. This is a control lead to supply current to the wire feeder motor; it does not carry welding current.

4.Set the MODE switch on the engine drive to CV- WIRE.

5.Set the WELD TERMINALS switch to WELD TER-

MINALS ON.

6.Set the WIRE FEEDER VOLTMETER switch to either "+" or "-" as required by the electrode polarity being used.

7.Set the ARC CONTROL knob to "0" initially and adjust to suit.

8.Set the IDLE switch to the AUTO position. Important: Some older engine drives may require the IDLE switch to be in the HIGH position for prop- er LN™-15 operation.

POWER SOURCE CONNECTION

The LN™-15 can be used with any DC welding power source. A constant voltage power source is recom- mend; however, the LN™-15 can also be used with a constant current power source as long as the open circuit voltage is less than 110VDC.

LN™-15 ACROSS THE ARC MODEL & (CE)