Lincoln Electric NA-3 Service Manual page 20

A-13
SAM MOTOR-GENERATOR OR ENGINE DRIVEN WELDER.
REMOVE SAM PORTABLE FIELD CONTROL AND
CONNECT LEADS B AND C FROM CONTROL CABLE
SAM-650
TERMINAL STRIP
CONNECTIONS ARE
SAME AS SAM-400
CONNECT "TAP"
FOR DESIRED
OUTPUT RANGE
TAP
STICK
ON EARLIER SAM MACHINES TERMINAL #1 WAS ALSO ON THE TERMINAL STRIP.
N.A. EXTEND LEAD #21 USING #14 AWG OR LARGER INSULATED WIRE PHYSICALLY SUITABLE FOR THE INSTALLATION. AN S16586-[ ]
REMOTE VOLTAGE SENSING WORK LEAD IS AVAILABLE FOR THIS PURPOSE. CONNECT IT DIRECTLY TO THE WORK PIECE, KEEPING IT
ELECTRICALLY SEPARATE FROM THE WELDING WORK LEAD CIRCUIT AND CONNECTION. FOR CONVENIENCE, THIS EXTENDED LEAD #21
SHOULD BE TAPED TO THE WELDING WORK LEAD.
N.B. TAPE UP BOLTED CONNECTIONS.
N.C. CONNECT THE CONTROL CABLE GROUND LEAD TO THE FRAME TERMINAL MARKED
OR TO AN UNPAINTED FRAME SCREW. THE POWER SOURCE MUST BE PROPERLY GROUNDED.
N.D. IF USING AN OLDER CONTROL CABLE, TAPE UP LEAD #75, CONNECT LEAD #76 TO TERMINAL #76 OF THE TERMINAL STRIP, AND
CONNECT LEAD #77 TO TERMINAL #75 OF THE TERMINAL STRIP.
N.E. WELDING CABLES MUST BE OF PROPER CAPACITY FOR THE CURRENT AND DUTY CYCLE OF IMMEDIATE AND FUTURE APPLICATIONS.
INSTALLATION
FIGURE A.10 – CONNECTION OF NA-3 (ALL) TO A
WARNING
TURN OFF INPUT POWER
TO THE WELDING POWER
SOURCE USING THE
DISCONNECT SWITCH
BEFORE WORKING
ELECTRIC
ON THIS EQUIPMENT.
SHOCK
CAN KILL
SAM-400
AUTO
AUTO
EQUIP.
EQUIP. WORK STICK
NA-3 AND NA-4
N.A. AND N.B.
21
67
N.C.
2
31
32
C4
77
76
75
WORK
TAPE
UP
N.E.
NEAR THE POWER SOURCE TERMINAL STRIP
R
CLEVELAND, OHIO U.S.A
TO AUTOMATIC
CONTROL BOX
CONTROL CABLE
21
2
ELECTRODE
CABLE TO
31
AUTOMATIC
32
SHUNT
4
GND
C
N.D.
B
A
N.E.
TO WORK
A-13