Miller Electric Subarc DC 650, Owner'S Manual

Page: 23 / 48

OM-236 684 Page 19
4-9. Selecting Cable Sizes
.
ARC WELDING can cause Electromagnetic Interference.
To reduce possible interference, keep weld cables as short as possible, close together, and down low, such as on the floor.
Locate welding operation 100 meters from any sensitive electronic equipment. Be sure this welding machine is installed
and grounded according to this manual. If interference still occurs, the user must take extra measures such as moving
the welding machine, using shielded cables, using line filters, or shielding the work area.
!
Turn off power before
connecting to weld out-
put terminals.
!
Do not use worn, dam-
aged, undersized, or
poorly spliced cables.
Total Cable (Copper) Length In Weld Circuit Not Exceeding
100 ft (30 m) Or Less
150 ft
(45 m)
200 ft
(60 m)
250 ft
(70 m)
300 ft
(90 m)
350 ft
(105 m)
400 ft
(120 m)
Welding
Amperes
10 − 60%
Duty
Cycle
60 − 100%
Duty Cycle
10 − 100% Duty Cycle
100 4 4 4 3 2 1 1/0 1/0
150 3 3 2 1 1/0 2/0 3/0 3/0
200 3 2 1 1/0 2/0 3/0 4/0 4/0
250 2 1 1/0 2/0 3/0 4/0 2-2/0 2-2/0
300 1 1/0 2/0 3/0 4/0 2-2/0 2-3/0 2-3/0
350 1/0 2/0 3/0 4/0 2-2/0 2-3/0 2-3/0 2-4/0
400 1/0 2/0 3/0 4/0 2-2/0 2-3/0 2-4/0 2-4/0
500 2/0 3/0 4/0 2-2/0 2-3/0 2-4/0 3-3/0 3-3/0
600 3/0 4/0 2-2/0 2-3/0 2-4/0 3-3/0 3-4/0 3-4/0
700 4/0 2-2/0 2-3/0 2-4/0 3-3/0 3-4/0 3-4/0 4-4/0
800 4/0 2-2/0 2-3/0 2-4/0 3-4/0 3-4/0 4-4/0 4-4/0
900 2-2/0 2-3/0 2-4/0 3-3/0 3-4/0 4-4/0 4-4/0
*Weld cable size (AWG) is based on either a 4 volts or less drop or a current density of at least 300 circular mils per ampere. Contact your
distributor for the mm
2
equivalent weld cable sizes.
S-0007-E
4-10. Connecting Weld Output Cables
803 778-B
!
Turn off power before connecting to
weld output terminals.
!
Failure to properly connect weld
cables may cause excessive heat
1 Weld Output Terminal
2 Supplied Weld Output Terminal Nut
3 Weld Cable Terminal
4 Copper Bar
Remove supplied nut from weld output ter-
minal. Slide weld cable terminal onto weld
output terminal and secure with nut so that
weld cable terminal is tight against copper
bar. Do not place anything between weld
cable terminal and copper bar. Make
sure that the surfaces of the weld cable
terminal and copper bar are clean.
Tools Needed:
3/4 in (19 mm)
4
2
3
Do not place
anything between
Correct Installation
Incorrect Installation
1
weld cable terminal
and copper bar.