Tipping; Weld Output Terminals And Selecting Cable Sizes - Miller Electric STR 450 Owner's Manual

3-7. Tipping

3-8. Weld Output Terminals and Selecting Cable Sizes

NOTICE − The Total Cable Length in Weld Circuit (see table below) is the combined length of both weld cables. For example, if the power source is
30 m (100 ft) from the workpiece, the total cable length in the weld circuit is 60 m (2 cables x 30 m). Use the 60 m (200 ft) column to determine cable
size.
Weld Output
Terminals
!
Turn off power be-
fore connecting to
weld output termi-
nals.
!
Do not use worn,
damaged, under-
sized, or poorly
spliced cables.
Welding
Amperes
Negative
Positive
Terminal
Terminal
956142737_5−5_B
This chart is a general guideline and may not suit all applications. If cable overheats, use next size larger cable.
*
**Weld cable size is based on either a 4 volts or less drop or a current density of at least 300 circular mils per ampere.
***For distances longer than those shown in this guide, call a factory applications representative.
Weld Cable Size** and Total Cable (Copper) Length in Weld Circuit
30 m (100 ft) or Less
10 − 60% 60 − 100%
Duty Duty
Cycle Cycle
2 2
mm (AWG) mm (AWG)
100 20 (4) 20 (4)
150 30 (3) 30 (3)
200 30 (3) 35 (2)
250 35 (2) 50 (1)
300 50 (1) 60 (1/0)
350 60 (1/0) 70 (2/0)
400 60 (1/0) 70 (2/0)
500 70 (2/0) 95 (3/0)
600 95 (3/0) 120 (4/0)
Not Exceeding***
45 m 60 m 70 m
(150 ft) (200 ft) (250 ft)
10 − 100% Duty Cycle
mm
20 (4) 30 (3) 35 (2)
35 (2) 50 (1) 60 (1/0)
50 (1) 60 (1/0) 70 (2/0)
60 (1/0) 70 (2/0) 95 (3/0)
70 (2/0) 95 (3/0) 120 (4/0)
2x70
95 (3/0) 120 (4/0)
(2 ea. 2/0)
2x70
95 (3/0) 120 (4/0)
(2 ea. 2/0)
2x70 2x95
120 (4/0)
(2 ea. 2/0) (2 ea. 3/0)
2x70 2x95 2x120
(2 ea. 2/0) (2 ea. 3/0) (2 ea. 4/0)
!
Do not move or operate unit
where it could tip.
956142737_5−5_B
90 m 105 m 120 m
(300 ft) (350 ft) (400 ft)
2
(AWG)
50 (1) 60 (1/0) 60 (1/0)
70 (2/0) 95 (3/0) 95 (3/0)
95 (3/0) 120 (4/0) 120 (4/0)
2x70 2x70
120 (4/0)
(2 ea. 2/0) (2 ea. 2/0)
2x70 2x95 2x95
(2 ea. 2/0) (2 ea. 3/0) (2 ea. 3/0)
2x95 2x95 2x120
(2 ea. 3/0) (2 ea. 3/0) (2 ea. 4/0)
2x95 2x120 2x120
(2 ea. 3/0) (2 ea. 4/0) (2 ea. 4/0)
2x120 3x95 3x95
(2 ea. 4/0) (3 ea. 3/0) (3 ea. 3/0)
3x95 3x120 3x120
(3 ea. 3/0) (3 ea. 4/0) (3 ea. 4/0)
Milan Ref. S-0007-G 2009−08
OM-236 031 Page 11