I have googled unsuccessfully. I have data about voltage drops etc. But what is acceptable?
Is there anywhere that I can find what are of wire I need, given my expected current and length of wire?
I ask because (Hi. I'm troy McClure...You may recognise me from...) I am setting up a welding traveller based on a Cobramatic push-pull welder. I need to extend the wired from the power source to the feeder, and also the erath electrode wire. I also may need to install a solid wire from the feeder to the gun, rather than the water-fed one that's there at present. While the water fed is superior, they cost a small fortune, unless I can cobble one up, which may or may not be worth the trouble.
I have asked a couple of welding shops, and had vastly (in?)different replies, both between thenselves and from the wire that is already on the welder.
Data
Welding current 220A max MIG Distance from welder to feeder 5 metres 916 feet) Distance from feeder to gun = 8 metres (25 feet)
Existing wire intended to go from welder to feeder length = 2 metres (6.5 feet) area = 70mm^2 !!!!!!
I am sure the welding shops were talking a lot less than this. I do knwo that the same feeder is designed to provide power to a 400 Amp gun, if required. So it's all swings and roundabouts.
Any help appreciated.