Weld Output Terminals And Selecting Cable Sizes; Connecting Weld Output Cables - Miller Electric Dimension NT 450, NT 500 Owner's Manual

4-8. Weld Output Terminals And Selecting Cable Sizes

! !
Turn Off power before Turn Off power before
connecting to weld
output terminals.
Negative
Positive
Terminal Terminal
*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
2
the mm equivalent weld cable sizes.

4-9. Connecting Weld Output Cables

Tools Needed:
3/4 in (19 mm)
!
Turn off power before connecting to
weld output terminals.
!
Failure to properly connect weld
cables may cause excessive heat
and start a fire, or damage your ma-
chine.
OM-2252 Page 18
Total Cable (Copper) Length In Weld Circuit Not Exceeding
100 ft (30 m) Or Less
10 − 60%
Welding 60 − 100%
Duty
Amperes Duty Cycle
Cycle
100 4
150 3
200 3
250 2
300 1
350 1/0
400 1/0
500 2/0
600 3/0
700 4/0 2-2/0
4
1
Do not place
anything between
weld cable terminal
and copper bar.
2
3
Correct Installation
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
150 ft 200 ft
(45 m) (60 m)
4 4 3
3 2 1
2 1 1/0
1 1/0 2/0
1/0 2/0 3/0
2/0 3/0 4/0
2/0 3/0 4/0
3/0 4/0 2-2/0
4/0 2-2/0 2-3/0
2-3/0 2-4/0
250 ft 300 ft 350 ft
(70 m) (90 m) (105 m)
10 − 100% Duty Cycle
2 1 1/0
1/0 2/0 3/0
2/0 3/0 4/0
3/0 4/0 2-2/0
4/0 2-2/0 2-3/0
2-2/0 2-3/0 2-3/0
2-2/0 2-3/0 2-4/0
2-3/0 2-4/0 3-3/0
2-4/0 3-3/0 3-4/0
3-3/0 3-4/0 3-4/0
Incorrect Installation
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.
400 ft
(120 m)
1/0
3/0
4/0
2-2/0
2-3/0
2-4/0
2-4/0
3-3/0
3-4/0
4-4/0
S-0007-E
803 778-B