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220v 3 wire to 220v 2 wire (USA to Philippines)

Hello all, 

I'd like to purchase a welding machine in the USA and take it to the Philippines. My problem and hopefully solution is, USA use 2 legs of 110v for 220v appliances/machines. In the Philippines, voltage is 220v (single leg). So, If I have a single phase, 220v welder, can I cut the plug off, combine the two power legs and connect to the power in the Philippines? I hope I am able to articulate this question properly. Mig welders are not easily available over there. Thank you for anyone that can help

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A quick look on the miller welder website shows that their welders are good for 50 or 60 hertz at 230volt +or - 10% . So I would say it would be good to go. But ask the shop for advise before you buy, I cant see any problem if you get the right welder.

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Downunder35m7 months ago

If I am not mistaken the Phillipines use 50Hz and 220V while the US uses 60Hz and 110V.
Sadly this mean that a transformer for US use won't survive outside the 60Hz zone even if the voltage is matched.
It would overheat.
You might want to consider oredering the machine from Australia instead.

You might be mistaken, regarding the frequency of electric mains power in the Philippines.

Wikipedia has a big table listing voltage, frequency, and plug shapes, for residential mains power for (all?) Earth's countries, here,
https://en.wikipedia.org/wiki/Mains_electricity_by...

and there's a reference to another page,
http://www.iec.ch/worldplugs/
where most of that data probably came from.

These pages are useful, if you ever find yourself wondering how people in other parts of the world get their mains electricity.

Well, seems I did not do all my homework :(
That of course makes it a bit harder to get the right equippment.
But then again the supplier should be able to answer the question for sure.
Welder use a lot of electricity and although it seems pretty straight forward I would double check.

At least now you don't have to make a trip.

;-)

Or rather, I'm glad I don't have to make a trip. I'm a long way from the Philippines.

iceng7 months ago

Modern welders convert to DC and HF inverter to power the welder.

Jack A Lopez7 months ago

It would be helpful to know more about the power requirements of the welding machine. In particular, it would be helpful to know which nodes, of the mains, it wants to connect to, and how much current is expected to flow through each node.

To some extent, this question is answered just by looking at the shape of the shape of the plug on the welder.

For residential mains power users in the former US, the names of the nodes are: line-1 (L1), line-2 (L2), neutral (N), and ground (G), and there are several different plug shapes that make use of two, or three, or occasionally all four of these nodes. The Wikipedia page titled, "NEMA connector" has graphic, with pictures of several of these different plug shapes, here:

https://en.wikipedia.org/wiki/NEMA_connector
https://en.wikipedia.org/wiki/File:NEMA_simplified...

Anyway, I am guessing for plug shapes that make use of nodes {L1, L2, G}, like for example, NEMA 6-15, 6-20, 6-30, 6-50 (see pictures linked above), I am guessing a welder with those plug shapes, could use Philippines mains power, and I am guessing the wiring for this would be:

L1-US == L1-PH
L2-US == N-PH
G-US == G-PH

where I am using "-US" and "-PH" to mean "for US mains wiring" and "for Philippines mains wiring" respectively.

I do not recommend cutting the cord off your welder. I think it would be easier just to buy a receptacle, aka outlet, made for that shape of plug, and wire that outlet to your house in the Philippines.

Note that the circuit that supplies power to your welder is going to have to be kind of beefy. By that I mean, this circuit has wires thick enough to handle the, however many 10s of amperes, e.g. 20 A, 30 A, 50 A, of current, plus big beefy circuit breaker for the same.

I am not sure what existing wiring would work? Maybe a circuit wired for an electric stove, or clothes dryer? If those are not available I guess you have to install a new circuit, just for the welder.

Final note, if the plug to your welder, intended for US mains power, includes a connection to neutral,i.e. it has four wires {L1,L2,N,G}, like for example, the plug shapes NEMA 14-20, 14-30, 14-50, 14-60, then that is probably bad news, meaning that is a plug shape for a device that wants to sort of use both 110VAC and 220VAC at the same time.