Connecting To Weld Output Terminals; Selecting Weld Cable Sizes - Miller PRO 300 Owner's Manual

5-7. Connecting To Weld Output Terminals

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5-8. Selecting Weld Cable Sizes*

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.
This chart is a general guideline and may not suit all applications. If cables overheat, 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.
2
( ) = mm for metric use
***For distances longer than those shown in this guide, call a factory applications representative at 920-735-4505.
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3
2
Weld Cable Size** and Total Cable (Copper) Length in Weld Circuit
100 ft (30 m) or Less
10 − 60% 60 − 100%
Welding
Duty
Amperes
Cycle Cycle
100 4 (20)
150 3 (30)
200 3 (30)
250 2 (35)
300 1 (50) 1/0 (60)
350 1/0 (60) 2/0 (70)
400 1/0 (60) 2/0 (70)
500 2/0 (70) 3/0 (95)
3
Not Exceeding***
150 ft 200 ft
(45 m) (60 m)
Duty
4 (20) 4 (20) 3 (30)
3 (30) 2 (35) 1 (50)
2 (35) 1 (50) 1/0 (60)
1 (50) 1/0 (60) 2/0 (70)
2/0 (70) 3/0 (95)
3/0 (95) 4/0 (120)
3/0 (95) 4/0 (120)
2 ea. 2/0
4/0 (120)
(2x70)
Y Stop engine.
1 Work (−) Weld Output Terminal
2 CV (Wire) Weld Output Terminal
3 CC (Stick/TIG) Weld Output Terminal
Stick and TIG Welding
For Stick and TIG welding Direct Current Elec-
trode Positive (DCEP), connect electrode
holder cable to CC (Stick/TIG) terminal on
right and work cable to Negative (−) terminal
on left.
For Direct Current Electrode Negative
(DCEN), reverse cable connections.
Use Process/Contactor switch to select type
of weld output (see Section 6-3).
MIG and FCAW Welding
For MIG and FCAW welding Direct Current
Electrode Positive (DCEP, connect wire feed-
er cable to CV (Wire) terminal on right and
work cable to Work/Negative (−) terminal on
left. Use Process/Contactor switch to select
type of weld output (see Section 6-3).
For Direct Current Electrode Negative
(DCEN), reverse cable connections.
Tools Needed:
3/4 in
250 ft 300 ft 350 ft
(70 m) (90 m) (105 m)
10 − 100% Duty Cycle
2 (35) 1 (50) 1/0 (60)
1/0 (60) 2/0 (70) 3/0 (95)
2/0 (70) 3/0 (95) 4/0 (120) 4/0 (120)
2 ea. 2/0
3/0 (95) 4/0 (120)
(2x70)
2 ea. 2/0 2 ea. 3/0
4/0 (120)
(2x70) (2x95)
2 ea. 2/0 2 ea. 3/0 2 ea. 3/0
(2x70) (2x95) (2x95)
2 ea. 2/0 2 ea. 3/0 2 ea. 4/0
(2x70) (2x95) (2x120)
2 ea. 3/0 2 ea. 4/0 3 ea. 3/0
(2x95) (2x120) (3x95)
OM-4422 Page 25
803 562 / 214 778-B
400 ft
(120 m)
1/0 (60)
3/0 (95)
2 ea. 2/0
(2x70)
2 ea. 3/0
(2x95)
2 ea. 4/0
(2x120)
2 ea. 4/0
(2x120)
3 ea. 3/0
(3x95)
S-0007-F