Sunday, June 11, 2017

Welding Cables user manual and selecting proper size

" I need to order some welding cable for our shop, but am not sure the correct size to get. I have seen some reference charts, but would like an explanation on how to use them."

This is a common question and answered by LINCOLN ELECTRIC USA.  

"Welding cable “ampacity”, also known as current capacity or amperage rating, refers to the maximum amount of electrical current that a cable can safely conduct.  Besides the cross sectional area, other factors that impact the ampacity of welding cable are its length, ohm rating (i.e., resistance rating), temperature ratings of the insulation material and the ambient temperature. Shorter cables can carry more current than longer cables of the same diameter. Welding cable is often rated with a conductor temperature of 75°C (167° F), 90°C (194⁰F) or 105°C (221°F). While the copper wire itself can handle the high temperatures generated by higher amperages before sustaining damage, the insulation protecting them would melt. Welding cables are also often rated for an ambient temperature of 30°C (86°F). Higher ambient temperatures can reduce their ability to dissipate heat into the surrounding environment, and thus reduce their ampacity. In addition, several cables packed tightly together can also have a reduction in their ability to dissipate heat. Multiple cables should be slightly spread apart."

            http://www.lincolnelectric.com/en-us/support/welding-solutions/Pages/selecting-proper-size-welding-cables.aspx






Selecting the Proper Size Welding Cables

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