5-8. Selecting Weld Cable Sizes*

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

Not Exceeding***

Weld Output

Terminals

! Stop engine

before

 

 

 

 

 

 

 

 

 

connecting to

weld

 

 

 

 

 

 

 

 

 

output terminals.

100 ft (30 m) or Less

150 ft

200 ft

250 ft

300 ft

 

350 ft

400 ft

! Do not use worn, dam-

(45 m)

(60 m)

(70 m)

(90 m)

 

(105 m)

(120 m)

 

 

 

aged, undersized, or

 

 

 

 

 

 

 

 

 

poorly spliced cables.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Welding

10 − 60%

60 − 100%

 

 

 

 

 

 

 

 

 

Duty

Duty

 

10 − 100% Duty Cycle

 

 

 

 

Amperes

 

 

 

 

 

Cycle

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

2 ea. 2/0

 

 

(2x70)

(2x70)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

300

1 (50)

1/0 (60)

2/0 (70)

3/0 (95)

4/0 (120)

2 ea. 2/0

 

2 ea. 3/0

2 ea. 3/0

 

(2x70)

 

(2x95)

(2x95)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

350

1/0 (60)

2/0 (70)

3/0 (95)

4/0 (120)

2 ea. 2/0

2 ea. 3/0

 

2 ea. 3/0

2 ea. 4/0

 

(2x70)

(2x95)

 

(2x95)

(2x120)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

400

1/0 (60)

2/0 (70)

3/0 (95)

4/0 (120)

2 ea. 2/0

2 ea. 3/0

 

2 ea. 4/0

2 ea. 4/0

 

(2x70)

(2x95)

 

(2x120)

(2x120)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

500

2/0 (70)

3/0 (95)

4/0 (120)

2 ea. 2/0

2 ea. 3/0

2 ea. 4/0

 

3 ea. 3/0

3 ea. 3/0

 

(2x70)

(2x95)

(2x120)

 

(3x95)

(3x95)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*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.

 

( ) = mm2 for metric use

S-0007-F

***For distances longer than those shown in this guide, call a factory applications representative at 920-735-4505.

Notes

OM-4433 Page 25

Page 29
Image 29
Miller Electric Big Blue 300 manual Selecting Weld Cable Sizes, Stop engine Before Connecting to Weld Output terminals

Big Blue 300 specifications

The Miller Electric Big Blue 300 is a powerful and versatile engine-driven welder that has become a popular choice for professionals in various industries. Designed to excel in both welding and generator applications, the Big Blue 300 provides reliable performance, advanced technology, and exceptional durability, making it suitable for demanding work environments.

One of the standout features of the Big Blue 300 is its impressive output capabilities. With a maximum welding output of 300 amps, this machine can handle a wide range of welding applications, from stick to TIG and MIG processes. The dual voltage output allows for versatility in the field, accommodating both 120V and 240V power requirements, ensuring you can power tools and equipment directly from the welder.

The Big Blue 300 is equipped with Miller's innovative Clean Air Technology, which ensures that the engine operates efficiently and produces fewer emissions. This feature not only meets environmental standards but also enhances the longevity of the machine. The cooling system is engineered to maintain optimal operating temperatures, extending the life of the engine and related components.

For ease of use, the Big Blue 300 features an intuitive control panel with easy-to-read gauges and simple adjustment settings, allowing operators to quickly set welding parameters. The built-in Fuel Gauge and Hour Meter provide real-time information about fuel levels and usage, enabling efficient operation and maintenance planning.

Another notable characteristic of the Big Blue 300 is its rugged construction. Built to withstand harsh job site conditions, the machine features a durable frame and heavy-duty components that can endure the rigors of everyday use. The oversized wheels and solid axle design enhance portability, making it easy to transport across various terrains.

Additionally, the Big Blue 300 is designed for quiet operation, making it suitable for locations where noise levels are a concern. Its low decibel rating ensures that it won’t disturb the work environment, contributing to a more comfortable and productive atmosphere.

Overall, the Miller Electric Big Blue 300 is a robust engine-driven welder that combines power, efficiency, and portability. Whether working on construction sites, maintenance tasks, or fabrication projects, this machine delivers exceptional performance and reliability, making it a valuable tool for professionals who demand the best in their equipment.