Selecting Cable Sizes; Weld Output Terminals - Miller XMT 450 CC/CV Owner's Manual

5-2. 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 100 ft (30 m) from the workpiece, the total cable length in the weld circuit is 200 ft (2 cables x 100 ft). Use the 200 ft (60 m) column to determine
cable size.
100 ft (30 m) or Less
10 − 60%
60 − 100%
Duty
Welding
Duty Cycle
Cycle
Amperes
AWG (mm
2
AWG (mm )
100 4 (20)
150 3 (30)
200 3 (30)
250 2 (35)
300 1 (50)
350 1/0 (60)
400 1/0 (60)
500 2/0 (70)
600 3/0 (95)
This chart is a general guideline and may not suit all applications. If cable overheats, 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 rep. at 920-735-4505 (Miller) or 1-800-332-3281 (Hobart).

5-3. Weld Output Terminals

Weld Cable Size** and Total Cable (Copper) Length in Weld Circuit
150 ft
(45 m)
2
)
4 (20) 4 (20)
3 (30) 2 (35)
2 (35) 1 (50)
1 (50) 1/0 (60)
1/0 (60) 2/0 (70)
2/0 (70) 3/0 (95)
2/0 (70) 3/0 (95)
3/0 (95) 4/0 (120) 2x2/0 (2x70)
4/0 (120) 2x2/0 (2x70) 2x3/0 (2x95)
1
.
A complete Parts List is available at www.MillerWelds.com
Not Exceeding***
200 ft 250 ft
(60 m) (70 m)
10 − 100% Duty Cycle
AWG (mm
3 (30) 2 (35)
1 (50) 1/0 (60)
1/0 (60) 2/0 (70)
2/0 (70) 3/0 (95)
3/0 (95) 4/0 (120) 2x2/0 (2x70)
4/0 (120) 2x2/0 (2x70) 2x3/0 (2x95)
4/0 (120) 2x2/0 (2x70) 2x3/0 (2x95)
2x3/0 (2x95) 2x4/0 (2x120)
2x4/0 (2x120) 3x3/0 (3x95)
2
300 ft 350 ft
(90 m) (105 m)
2
)
1 (50) 1/0 (60)
2/0 (70) 3/0 (95)
3/0 (95) 4/0 (120)
4/0 (120) 2x2/0 (2x70) 2x2/0 (2x70)
2x3/0 (2x95) 2x3/0 (2x95)
2x3/0 (2x95) 2x4/0 (2x120)
2x4/0 (2x120) 2x4/0 (2x120)
3x3/0 (3x95) 3x3/0 (3x95)
3x4/0 (3x120) 3x4/0 (3x120)
Ref. S-0007-L 2015−02
!
Turn off power before connecting
to weld output terminals.
!
Do not use worn, damaged, un-
dersized, or repaired cables.
1 Positive (+) Weld Output Terminal
2 Negative (−) Weld Output Terminal
.
See Section 5-4 for information on
connecting to weld output termi-
nals, and Sections 7-1 thru 9-1 for
standard connection diagrams.
output term1 2015−02
OM-257220 Page 19
400 ft
(120 m)
1/0 (60)
3/0 (95)
4/0 (120)