Welding Cable Sizes 25mm-70mm

Welding Cable

Welding cable , single-insulated used to carry voltage from welding power sources to earth clamps and electrode holders.  Available in 25mm, 35mm, 50mm & 70mm and Sold by the metre.

What size of welding cable do you need?

Here’s a handy chart to figure out what size of welding cable is needed.

It is important to remember that while copper is an excellent conductor of electricity, it still has a degree of resistance to the flow of electrons through it. Therefore, some amount of resistance heating will occur in the cable. It is normal for a properly sized welding cable to feel warm to the touch after prolonged welding.

However, if the diameter of cable is too small for the level of current flowing through it, then the cable will overheat. This can result in a potential fire hazard, as well as damage to the cable itself (and ultimately to cable breakage and failure). A breakdown of the insulation jacket can also be an electrical shock hazard.

Conversely, cable that is over-sized for a given amperage level does not conduct current any more effectively than properly sized cable. However, larger diameter cable typically costs more per foot or per meter than smaller diameter cable, because of the increased amount of copper strands. Therefore, over-sized cables may not be cost effective.

If you’re not sure what size of welding cable you require, please give us a call on 028 9046 0541.

For more technical information about current and welding, please see this article by TWI .

To see our range of welding accessories, go to Welder’s Choice Accessories.