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Unread 01-25-2008, 12:39 PM   #1
RedMountainYJ
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What size breaker for 220v Welder

Im going to install a dedicated 220v receptacle in my garage. I was planning on using a 30 Amp breaker but i really dont know if that would be sized correctly. i have an old (looks really really old), borrowed welder but am planing of buying something in the Hobart Stickmate flavor soon (maybe a mig depending on my tax refund). if i read the specs right the Hobart Stickmate 205 AC can hit 47.5 full load amps (but im not sure if thats draw or what).

1. should i expect to hitting full load amps on any welder when using it?

2. would 30 amp service do me well or should i jump into 50 amp service? (i have both space and capacity in my panel for either).

EDIT: 3. do all welders share a common style plug?

Thanks!
ED

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Last edited by RedMountainYJ; 01-25-2008 at 02:27 PM..
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Unread 01-25-2008, 01:10 PM   #2
kencaz
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from the Specs:

NEMA 6-50 style plug included

Go with a 2 Pole 50A breaker Two #6 and one #10 Ground in 3/4 EMT. If the main panel is not within visual range of the welder you'll need to install a 2pole 50 disconnect as well.

Good Luck

KC
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Unread 01-25-2008, 02:21 PM   #3
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I used 60 amp breakers & stick weld a lot of thick stuff for long periods, no problems. My garage breaker box is also 150'+ from the house/main box.
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Unread 01-25-2008, 04:04 PM   #4
Bigbob
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Quote:
Originally Posted by ElHeffe
Im going to install a dedicated 220v receptacle in my garage. I was planning on using a 30 Amp breaker but i really dont know if that would be sized correctly. i have an old (looks really really old), borrowed welder but am planing of buying something in the Hobart Stickmate flavor soon (maybe a mig depending on my tax refund). if i read the specs right the Hobart Stickmate 205 AC can hit 47.5 full load amps (but im not sure if thats draw or what).

1. should i expect to hitting full load amps on any welder when using it?

2. would 30 amp service do me well or should i jump into 50 amp service? (i have both space and capacity in my panel for either).

EDIT: 3. do all welders share a common style plug?

Thanks!
ED
I have the 6/3 romex for mine, but my run is about 85 feet. 50 amp breaker. If your run is short you can use 8 gauge wire.
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Unread 01-25-2008, 04:08 PM   #5
RedMountainYJ
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Quote:
Originally Posted by Bigbob
I have the 6/3 romex for mine, but my run is about 85 feet. 50 amp breaker. If your run is short you can use 8 gauge wire.
my run is going to about 3' (directly below my MDP).


should put a 50 amp set up in? what do 90% of 220v welders require?
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Unread 01-25-2008, 05:39 PM   #6
Bigbob
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Quote:
Originally Posted by ElHeffe
my run is going to about 3' (directly below my MDP).


should put a 50 amp set up in? what do 90% of 220v welders require?
50 amp breaker is correct. But I would just run 8 gauge wire. Here's a chart.

http://www.jhlarson.com/ind_tables/v...c_wiresize.htm
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