Welding Cable Class K Class K welding cable is the most commonly used. Heavy Duty Welding Cable for use where maximum flexibility and resistance to cuts, tears, abrasion is required. Both our Class K and Class M Welding Cables are available below. . Multiple cables should be slightly spread apart.
In addition, worn or frayed cable connections to the work clamp, lugs or twist lock connectors can also decrease the ability to carry the current and create hot spots see examples in Figure 6. Figure 1: Example Wire Gauge Sizes In the metric system, welding cable size is typically expressed in square millimeters mm2 , representing the cross-sectional area of the cable. Besides the cross sectional area, other factors that impact the ampacity of welding cable are its length, ohm rating i. These highly flexible cables come with a rugged jacket and are available in black, green, red, blue and yellow. It is normal for a properly sized welding cable to feel warm to the touch after prolonged welding. Resistant to chemicals, oils, and acids and is also weather, ozone and sunlight resistant.
Resistant to chemicals, oils, and acids and is also weather, ozone and sunlight resistant. Conversely, as output levels increase until maximum output capacity , duty cycle decreases. The duty cycle rating of a welding power source is typically related to the welding processes in which it will be used, its intended use and whether it operates off of single phase or three phase power. Welding cable is the electrical conductor for the welding current. It is the percentage of a ten minute period that the power source can operate at a given output current level before exceeding its thermal limit i.
While the copper wire itself can handle the high temperatures generated by higher amperages before sustaining damage, the insulation protecting them would melt. Other charts are available from cable manufacturers and welding reference books. Class K cable is commonly used for stationary welding jobs. Figure 3: Example Welding Circuit Note that welding polarity does not affect the size of cable needed. Therefore, oversized cables may not be cost effective.
Item sold by the foot O. Therefore, some amount of resistance heating will occur in the cable. A larger diameter hose is needed in order to carry a greater volume of water. Applications: For connections from electrode holder and clamp to arc welder, bus, welding box or transformer. It consists of a series of fine copper strands wrapped inside a non-conductive, durable jacket typically some type of synthetic or natural rubber of various colors. Generally as output levels decrease, duty cycle increases until 100% or continuous output. These are hardy, heavy-duty cables.
You use a smaller hose to water your garden, while the fire department uses a much larger hose to fight fires. However, larger diameter cable typically costs more per foot or per meter than smaller diameter cable, because of the increased amount of copper strands. As the current level increases measured in amperage or amps , the diameter of the welding cable and resulting cross sectional area of the copper stranding needs to increase. The work cable attaches to a work clamp. The concept is similar to the flow of water through a hose. Conversely, cable that is oversized for a given amperage level does not conduct current any more effectively than properly sized cable. Weather, ozone and sunlight resistant jacket.
Note that while copper is an excellent conductor of electricity, it still has a degree of resistance to the flow of electrons through it. Figure 5: Selecting the Proper Size Welding Cable It should also be noted that in addition to proper cable size selection, it is very important to maintain the welding cable and the cable connections in good condition. Each is rated to 600 volts. Class M cable can be relied on for constant service from -50°C up to 90°C. Figure 3 illustrates the welding circuit. Item sold by the foot O.
All of our welding wire options feature superior flexibility and durability, performing as professionally as the people who use them. A breakdown of the insulation jacket can also be an electrical shock hazard. View our large selection of with the greatest values online. Welding cables are also often rated for an ambient temperature of 30°C 86°F. Heavy Duty Welding Cable for use where maximum flexibility and resistance to cuts, tears, abrasion is required. Welders Supply has just the cables you need! Wall Finished Wire Diameter Nom.