INSTALLATION
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WELDING CABLE CONNECTIONS
CABLE INSTALLATION, POLARITY CONTROL, AND CABLE SIZES
With the engine off, route the electrode and work cables through the strain relief bracket on the base front and connect them to the terminals. (See size rec- ommendations below.) For positive polarity, connect the electrode cable to the terminal marked Positive (+). For Negative polarity, connect the electrode cable to the Negative
CAUTION
•Loose connections will cause the output terminals to overheat. The terminals may eventually melt.
•Do not cross the welding cables at the output terminal connection. Keep the cables isolated and separate from one another.
When welding at a considerable distance from the welder, be sure you use ample size welding cables. Table A.1 lists recommended cable sizes and lengths for rated current and duty cycle. Length refers to the distance from the welder to the work and back to the welder. Cable diameters are increased for long cable lengths to reduce voltage drops.
Lincoln Electric offers a welding accessory kit with prop- erly specified welding cables. See the Accessories section of this manual for more information.
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TABLE A.1 - RECOMMENDED WELDING CABLE SIZE AND LENGTH
TOTAL COMBINED LENGTH OF ELECTRODE AND WORK CABLES
Amps @ 100% | Cable sizes for combined length of electrode | |||
| plus work cable |
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| |
Duty Cycle |
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| Up to 150 ft. | 150 - 200 ft. | 200 - 250 ft. |
|
300 | 2/0 AWG | 2/0 AWG | 3/0 AWG | |
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COMMANDER 300
