8. connecting to weld output terminals, 9. selecting weld cable sizes – Miller Electric Big 40 WG Manuel d'utilisation
Page 23
OM-4405 Page 19
4-8.
Connecting To Weld Output Terminals
802 729
Y
Stop engine.
1
Positive (+) Weld Output Terminal
2
Negative (–) Weld Output Terminal
For Stick and TIG welding Direct Current
Electrode Positive (DCEP), connect
electrode holder cable to Positive (+) ter-
minal on left and work cable to Negative
(–) terminal on right.
For Direct Current Electrode Negative
(DCEN), reverse cable connections.
If equipped with optional polarity switch,
connect electrode holder cable to Elec-
trode terminal on left and work cable to
Work terminal on right.
For MIG and FCAW welding Direct Cur-
rent Electrode Positive (DCEP) on CC/
CV models, connect wire feeder cable to
Positive (+) terminal on left and work
cable to Negative (–) terminal on right.
Use Process/Contactor switch to select
type of weld output (see Section 6-3).
For Direct Current Electrode Negative
(DCEN), reverse cable connections.
If equipped with optional polarity switch,
connect wire feeder cable to Electrode
terminal on left and work cable to Work
terminal on right.
Tools Needed:
2
3/4 in
1
4-9.
Selecting Weld Cable Sizes
Weld Cable Size** and 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)
Weld Output
Terminals
Y
Stop engine before
connecting to weld out-
put terminals.
Y
Do not use worn, dam-
aged, undersized, or
poorly spliced cables.
Welding
Amperes
10 – 60%
Duty
Cycle
60 – 100%
Duty
Cycle
10 – 100% Duty Cycle
100
4 (20)
4 (20)
4 (20)
3 (30)
2 (35)
1 (50)
1/0 (60)
1/0 (60)
150
3 (30)
3 (30)
2 (35)
1 (50)
1/0 (60)
2/0 (70)
3/0 (95)
3/0 (95)
200
3 (30)
2 (35)
1 (50)
1/0 (60)
2/0 (70)
3/0 (95)
4/0 (120)
4/0 (120)
250
2 (35)
1 (50)
1/0 (60)
2/0 (70)
3/0 (95)
4/0 (120)
2 ea. 2/0
(2x70)
2 ea. 2/0
(2x70)
300
1 (50)
1/0 (60)
2/0 (70)
3/0 (95)
4/0 (120)
2 ea. 2/0
(2x70)
2 ea. 3/0
(2x95)
2 ea. 3/0
(2x95)
350
1/0 (60)
2/0 (70)
3/0 (95)
4/0 (120)
2 ea. 2/0
(2x70)
2 ea. 3/0
(2x95)
2 ea. 3/0
(2x95)
2 ea. 4/0
(2x120)
400
1/0 (60)
2/0 (70)
3/0 (95)
4/0 (120)
2 ea. 2/0
(2x70)
2 ea. 3/0
(2x95)
2 ea. 4/0
(2x120)
2 ea. 4/0
(2x120)
500
2/0 (70)
3/0 (95)
4/0 (120)
2 ea. 2/0
(2x70)
2 ea. 3/0
(2x95)
2 ea. 4/0
(2x120)
3 ea. 3/0
(3x95)
3 ea. 3/0
(3x95)
*
This chart is a general guideline and may not suit all applications. If cable overheating occurs (normally you can smell it), use next size larger
cable.
**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.
( ) = mm
2
for metric use
S-0007-E–
***For distances longer than those shown in this guide, call a factory applications representative at 920-735-4505.