[AT] Wire size for welder?? Help welder people!

dglass dglass at mail.newnanutilities.org
Wed Dec 8 15:01:25 PST 2004


It might have changed some. At least here, you cannot use #14 in any 
residential application.

Dudley Rupert wrote:

>John,
>
>I hope the following little table showing Load, Circuit Breaker and Wire
>Size transmits in a readable fashion -
>
>I took it from the NEC (National Electrical Code) probably 25 years ago but
>I can't imagine it has changed.
>
>Dudley Rupert
>Snohomish, Washington
>
>      Load     Circuit Breaker        Wire Size
>=<15 amps      15 amp         Not less than #14
>=<20 amps      20 amp         Not less than #12
>=<30 amps      30 amp         Not less than #10
>=<40 amps      40 amp         Not less than #8
>=<50 amps      50 amp         Not less than #6
>
>-----Original Message-----
>From: at-bounces at lists.antique-tractor.com
>[mailto:at-bounces at lists.antique-tractor.com]On Behalf Of John Wilkens
>Sent: Tuesday, December 07, 2004 8:02 PM
>To: at at lists.antique-tractor.com
>Subject: [AT] Wire size for welder?? Help welder people!
>
>If I have a 230 volt mig welder that is rated at 45 amps input current I
>assume I would want a 50 amp 230 volt breaker .  But what minimum romex
>wire gauge would I need to run 25' from the breaker box to the outlet box
>for the welder?   For years I've used 10 gauge wire for my 225 amp output
>Lincoln buzz box.     John W.
>
>                    In the wide-open spaces of NE Oregon
>
>
>
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