Miller WC-115A Owner's Manual - Page 14

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3-5. 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%

Duty

Welding

Cycle

Amperes

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.

( ) = mm

for metric use

***For distances longer than those shown in this guide, see AWS Fact Sheet No. 39, Welding Cables, available from the American Welding

Society at http://www.aws.org.

Notes

OM-1078 Page 10

Weld Cable Size** and Total Cable (Copper) Length in Weld Circuit

150 ft

(45 m)

60 − 100%

Duty Cycle

AWG (mm

)

4 (20)

3 (30)

2 (35)

1 (50)

1/0 (60)

2/0 (70)

3/0 (95)

2/0 (70)

3/0 (95)

4/0 (120)

2x2/0 (2x70)

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)

2/0 (70)

3/0 (95)

4/0 (120)

2x2/0 (2x70)

4/0 (120)

2x2/0 (2x70)

2x3/0 (2x95)

2x4/0 (2x120)

300 ft

350 ft

(90 m)

(105 m)

)

1 (50)

1/0 (60)

2/0 (70)

3/0 (95)

4/0 (120)

2x2/0 (2x70)

2x3/0 (2x95)

2x4/0 (2x120) 2x4/0 (2x120)

2x4/0 (2x120)

3x3/0 (3x95)

3x4/0 (3x120) 3x4/0 (3x120)

Ref. S-0007-M 2017−08

400 ft

(120 m)

1/0 (60)

3/0 (95)

4/0 (120)

2x2/0 (2x70)

2x3/0 (2x95)

2x4/0 (2x120)

3x3/0 (3x95)