Lincoln Electric NA-3S, Service Manual, Page: 20 / 110

INSTALLATION
A-13 A-13
NA-3 AND NA-4
FIGURE A.10 – CONNECTION OF NA-3 (ALL) TO A
SAM MOTOR-GENERATOR OR ENGINE DRIVEN WELDER.
CLEVELAND, OHIO U.S.A
ELECTRIC
SHOCK
CAN KILL
TURN OFF INPUT POWER
TO THE WELDING POWER
SOURCE USING THE
DISCONNECT SWITCH
BEFORE WORKING
ON THIS EQUIPMENT.
WARNING
R
TO WORK
TO AUTOMATIC
CONTROL BOX
ELECTRODE
CABLE TO
AUTOMATIC
SHUNT
21
2
31
32
GND
A
B
C
4
AUTO
EQUIP.
STICK WORK
TAPE
UP
SAM-400
67
21
2
31
32
C4
76
77
75
AUTO
EQUIP. STICK
TERMINAL STRIP
CONNECTIONS ARE
SAME AS SAM-400
CONNECT "TAP"
FOR DESIRED
OUTPUT RANGE
WORK
SAM-650
REMOVE SAM PORTABLE FIELD CONTROL AND
CONNECT LEADS B AND C FROM CONTROL CABLE
N.A. AND N.B.
CONTROL CABLE
N.D.
N.E.
N.C.
N.E.
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 NEAR THE POWER SOURCE TERMINAL STRIP
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.
TAP