Gday,
I am trying to work out if 70mmsq/2/0 copper welding cable running up to 150 Amp@30to60 volt is going to be enough over 250m820ft from welding electrode to welder.
I am useing miller 300amp dc welder
Any hepl would be great
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Welding cable Amp and voltage drop
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Dear convert-me.com forum visitors,
Our forum has been available for many years. In September 2014 we decided to switch it to read-only mode. Month after month we saw less posts with questions and answers from real people and more spam posts. We were spending more and more resources cleaning the spam until there were less them 1 legitimate message per 100 spam posts. Then we decided it's time to stop.
All the posts in the forum will be available and searchable. We understand there are a lot of useful information and we aren't going to remove anything. As for the new questions, you can always ask them on convert-me.com FaceBook page
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Re: Welding cable Amp and voltage drop
by Guest » Sun Jul 27, 2008 5:10 pm
Fitzy wrote:Gday,
I am trying to work out if 70mmsq/2/0 copper welding cable running up to 150 Amp@30to60 volt is going to be enough over 250m820ft from welding electrode to welder.
I am useing miller 300amp dc welder
Any hepl would be great
Resistivity of copper is about 17 nanohm·meters, but varies a little with temperature. Resistance is
resistivity x length/area
17E-9 ohm·m X 500 m /70E-6 m² = 0.12 ohm
(you have two wires 250 m)
0.12 ohms x 150 A = 18 V
At best, very marginal. Probably the drop is excessive.
- Guest
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