millermatic 211 220 outlet/ hookup question

[crewchief437]

so i bought a millermatic 211 and i am trying to get it up and running. in my shop my electrician wired my 240 outlets as such.

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you can buy an adapter similar to this but the horizontal prong is on the opposite side. Can i buy an additional adapter for this to make what i have work or do i need to change all the outlets? Thanks in advance, Adam

 

[soapii]

What type of plug is on the welder? That tells you what size wire to run for the 220 outlet and what receptacle to use.

That is a NEMA 6-20R correct? Isn't that too small for the welder?

My point is.......don't just change the outlet, make sure the wiring can handle the load of that welder. The welder probably uses a 6-50P so it needs a 6-50R. Wiring for 20 amps and 50 amps is quite a bit different.

--Joe

 

[crewchief437]

this is amperage
230 V, 25 A, 60 Hz, Single-Phase
120 V, 20 A, 60 Hz, Single-Phase
My 220 is run at 30A im pretty sure. I will have to double check tonight.
Here are the plugs it comes with

 

[soapii]

this is amperage
230 V, 25 A, 60 Hz, Single-Phase
120 V, 20 A, 60 Hz, Single-Phase
My 220 is run at 30A im pretty sure. I will have to double check tonight.
Here are the plugs it comes with

If you check and the wiring is suffice, I would swap the receptacle to the 6-50R.......looks like the plug is a 6-50P.

--Joe

 

[rsanter]

If you check and the wiring is suffice, I would swap the receptacle to the 6-50R.......looks like the plug is a 6-50P.

--Joe

This
Be sure the breaker and the wiring is up to snuff and then swap the recipticle

Bob

 

[crewchief437]

thanks for the info fellas. does that circuit need to 50A or 30A is enough?

 

[MoonRise]

RTFM, try Page 19, Section 4-11.

note: do NOT cut off the MVP plug on the end of the machine's power cord! No reason to do so.

You can run the MM211 on 120V power if you want/need to. Use the included 120V NEMA5-15 plug adapter and a 'standard' 120V NEMA 5-15R outlet.

For running the MM211 on 240V power, you can plug the MVP NEMA 6-50 adapter plug into a 'standard' NEMA6-50R outlet. You'd just have to change your existing outlet to a NEMA6-50R. The wiring to that outlet -should- be OK as is, since the manual calls for a minimum of 14 AWG copper wiring in the wall and a max wiring length on 53 feet. The circuit breaker for the 240V welder circuit should be a minimum of 25 amps (if the breaker has time-delay operating characteristics) or 35 amps if the breaker is not a time-delay.

Check the breaker on your 240V circuit (25 amp or greater and you should be good-to-go) and check the wire gauge (while you are changing the outlet and checking the breaker ) for a minimum of 14 AWH copper wire , change the outlet to a NEMA6-50R (a 'standard' welder outlet), and use the MM211's NEMA6-50P adapter plug. Weld away.

 

[DonPowers]

Check out page 18 & 19 in the owners manual for power supply options. Copy below.

http://www.gemplers.com/docs/manual/192244MANUAL.pdf

Here is a link to NEMA plug configurations.

http://www.generatorjoe.net/html/web/outlet/quailplug.html

 

[wyliesdiesels]

Branch circuits for welders are wired based on duty cycle.

See NEC T630.11a

The duty cycle is 30% and input current is 25a @ 240v.

.55 x 25= 13.75a...

So, as everyone has said #14 wire minimum and a 30a breaker.

 

[My Old Tools]

I put mine on a 10 ga 30 amp general purpose circuit that also supplies my tablesaw.

 

[sberry]

Change one of the circuits to a 50 recept and a 30 breaker although guys do run them on 20 and dont seem to have a problem. I personally put them on a 10/30 for a home port, they are small machines and I figure they need all the help they can get.
If this is any kind of useful garage cut a way to get access to a panel, as a pre planned "220" outlet these circuits are about useless most of the time. Not big enough to run a real air comp or properly wire a welder either.
Considering factory plugs I don't own a thing that it would be useful for, not that it couldn't but its all 120, a couple fixed things at 30 and welders at 50. I cant think of a single thing using 20A 240. You can tailor size a comp or woodworking tools in a real wood shop but its pointless and expensive for home use.

 

[sberry]

I spose some of the hoists could use it, most take 20A if they are not 120V. There is no better way than to leave means to tailor or add circuits as needed. If I really didn't know and was going to spec a couple extras I would buy an piece of 8 and dog it off in a 4 sq box, even a 10 will support any home welding and I havnt seen the comps trip a 30.
In reality a 12 wire may be fine to safely carry the needed load for as long as its needed but it makes for a lot of complications, similar to using the 14 minimum allowed for the 211. Before the dual V plug and for straight 240 models come with 12 cord and allow for 14 input provided this is single circuit in pipe, using pigtails to meet the listed wire sizes with the terminations and tailoring the breaker from a normal 50A welder circuit to 30.
The DV cord is 14, same power machine in 240 only has a 12 and the demands are the same, using a larger cord allows for greater short circuit protection and can be plugged in to 50A with no additional over current protection. etc
There must be some sort of fault protection in the adapter in the DVI Hence "do not modify or cut" and it wouldn't be needed at 120V at 20A common circuits and possibly good to 30A

 

[sberry]

They have crappy instructions and are aimed at electricians and about half them read it right. They should have a lay version that exceeds code with explanation. The machine needs only 14, the wire in the circuit needs to be bigger than that for short circuit protection to 50A

 

[theoldwizard1]

One of my personal pet peeves about welders !!!

The electrician install a 6-20R receptacle and likely 12 gauge wire and a 20A breaker, which is fine for that welder (probably has low duty cycle). The adapter plug provide looks like a 6-50P because that is what most larger welders come with, regardless if they really need it.

If you had a REAL 50A circuit, I would worry about overheating the welder unless it had some kind of internal shutdown (likely).

Probably not code legal, but I would follow sberry's advice. Install a 30A breaker and change the receptacle to a 6-50. If you are paranoid, put a sticker on the cover that says "240V @ 20A".