Howdy,
On Fri, 25 Mar 2005, Steve Shipley wrote:
> I just went out and looked at my breakers and I'm running my 5hp
> compressor on a 30amp breaker. My Lincoln SquareWave 175
> is running off a 125amp breaker. Can't tell you what the wire size
> is but it's bigger than anything other than the mains.
>
> It's also run to the garage in flexible conduit and I vaguely remember
> a calculation involving what size and number of wires can be run into
> a given cross section of conduit.
>
> Since a "300" sounds considerably larger than my "175" I am, in
> my ignorance, concerned about extension cords. I'm seeing some
> kid in an AC/DC t-shirt shouting "Fire, Fire! he-heh"
Lincoln is cool, because their product manuals are online...
http://content.lincolnelectric.com/pdfs/products/navigator/im/im687.pdf
Shows on page A-2 that the input current for 230vac is 65A using AC TIG or
53 A using stick or DC TIG.
Your 125A breaker is serious overkill for that machine, it looks like to
me. Not that that's a bad thing of course.
The different machines matter here... For instance, my 175 Lincoln SP-Plus
is only rated for 21A input current...
http://content.lincolnelectric.com/pdfs/products/navigator/im/IM790.pdf
Certainly if the original poster wants his machine to work at its highest
capacity, he needs to determine the input power requirements and size his
breaker/wiring/outlet to carry at least that much amperage.
Mark
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