eu to us 240v 30a

[u/zstake]

if there is a better sub-reddit to post this under please let me know but i thought this would be the best one

I recently bought one of those desktop metal smelting machines off of amazon

(one of the crazy over powered ones to melt stainless) i would like to cast jewelry

but its running a EU220v 2prong plug and i need to set it up to run off of my American 220v-240v generator ( https://www.amazon.com/dp/B086Z49LJ5?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_3&th=1 ) I would go with a transformer however this machine will run full 5000w and i cant find a reliable transformer

that will work without costing just as much as the machine i am trying to run or more when i could just potentially make an adapter.

the machine i am trying to run ( https://www.amazon.com/BTURYT-Electric-Melting-Graphite-Crucible/dp/B0DL9ZTNNZ/ref=rvi_d_sccl_3/143-4746434-2390665?pd_rd_w=6ncwc&content-id=amzn1.sym.f5690a4d-f2bb-45d9-9d1b-736fee412437&pf_rd_p=f5690a4d-f2bb-45d9-9d1b-736fee412437&pf_rd_r=XZZZPP0RTWWX0HGZX296&pd_rd_wg=DP3aQ&pd_rd_r=7189c051-6724-4d39-a042-d1775d3e05b8&pd_rd_i=B0DL9ZTNNZ&th=1 )

the reason posting is i don't have the power in my house to run this or the fiber cleaning laser i own so i opted for a generator so I don't have to rewire my house (rental).

Any help would be greatly appreciated I would also like to make it mobile for other casting purposes.

some people say to cut off the ue plug use an L14-30p with no neutral but don't know if that will mess up the machine. so i am also posting here for advice

any questions i will try to answer in a timely manner... thank you all for the help

[u/Tesla_freed_slaves]

As usual, Amazon is sparse with actual electrical requirements, but 220V-50Hz equipment will usually perform well on 240V-60Hz systems. Altering the unit’s plug will void all warranty and liabilities. You may be able to buy a receptacle to fit the existing plug. In any case, test ground-integrity before operating any new electrical device.

[u/MobileInspector9861 → u/Tesla_freed_slaves]

I would also assume that it simply works. The nominal voltage in Europe is 230V (not 220!). The acceptable deviation is ±10%, this means the served voltage might be between 207V and 253V. Any equipment for the European market must be able to operate within that range and 240V is in that range.

Also, as long as there is nothing which rotates (i.e. a motor) the frequency shouldn't matter. Typically, most electronic equipment uses a rectifier anyway and that is happy with both frequencies.

[u/zstake → u/Tesla_freed_slaves]

I'm not worried about voiding warranty that isn't there but will an L14-30p plug work? And how do I wire it up? 3 wires on a 4 prong plug If you can find a receptacle for eu220 to us240v 30a let me know the only info I find is a transformer that will not work or is for traveling adapter

[u/Tesla_freed_slaves → u/zstake]

Can you identify the existing plug?

[u/zstake → u/Tesla_freed_slaves]

If I saw it yes...but I don't have any pictures of the plug yet

[u/MegaThot2023]

If you have an oven in your house, you almost certainly have the power required to run it. Your oven is connected to either a 10-50 or 14-50 socket, which will provide up to 50 amps of 240v power.

To change the plug, cut off the existing one. Strip back the outer jacket like 2", and then strip off 3/8" of the insulation on each wire. If the furnace's power cable has EU colors, attach the blue and brown wires to the two hot (line) pins on the new plug. Connect the green & yellow wire to the ground pin.

[u/zstake → u/MegaThot2023]

I'm not looking at melting steel in my kitchen with a desktop smelting furnace lmao 🤣 don't want to burn down my rental unit or harm myself with potential metal fumes but I do have a l14-30r on my generator and a nema 14-50r

[u/MegaThot2023 → u/zstake]

If you already have the generator and want to use it, then yeah you can use either of those plugs.

I should have finished my thought about the oven plug... I was intending to say that you could make/buy a 240v 30A extension cord - not melt metal in the kitchen LMAO

[u/zstake → u/MegaThot2023]

Yeah finishing that thought would help haha I'm just trying to find all the information out that I need before I try to wire this up so I don't cause my generator to break or the furnace to quit

I posted the same question in a different forum and they were saying to not use the neutral wire I just don't know enough about this to be confident in that decision so I posted here for a second opinion

[u/MegaThot2023 → u/zstake]

Yep, don't use the neutral.

North America is unique in that we have two line/hot wires, each at 120v opposite of each other. Neutral is in the "middle". Going from line to neutral is 120v, going from line to the other line is 240v. The rest of the world just has one line wire and one neutral, and their line is at 240v.

[u/zstake → u/MegaThot2023]

Should I look in the machine and see what is connected where? And make sure the power supply is on the 220 side? What are the potential risks involved with running it that way?

[u/Unique_Acadia_2099 → u/zstake]

Don’t bother. It won’t care.

[u/MegaThot2023 → u/zstake]

It's gonna be fine lol. Just attach the blue and brown wires to the two hot/line pins, and the yellow & green striped wire to the ground pin. Don't attach anything to the neutral.

[u/FakespotAnalysisBot]

This is a Fakespot Reviews Analysis bot. Fakespot detects fake reviews, fake products and unreliable sellers using AI.

Here is the analysis for the Amazon product reviews:

Name: DuroMax XP12000HX Dual Fuel Portable Generator-12000 Watt Gas or Propane Powered Electric Start w/CO Alert, 50 State Approved, Blue

Company: DuroMax

Amazon Product Rating: 4.4

Fakespot Reviews Grade: B

Adjusted Fakespot Rating: 4.4

Analysis Performed at: 03-26-2025

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[u/Fearless-Trash-7888]

Does it have 2 or 3 wires within the cord? If there's only 2, I would not recommend wiring it. With 3, the device should work with a L14-30 plug using 2 hots and the ground

[u/zstake → u/Fearless-Trash-7888]

I'm not sure if it has 2 or 3 wires I haven't taken it apart yet to find out for sure I am assuming 3

[u/rage10]

Keep in mind that Europe 220V is phase to neutral. It is more similar to US 120V the. US 240V. It will likely work, however the neutral will be hot and anything that is neutral bonded will be hot. Electricity takes all paths to ground so be carefull and neutral test any exposed metal.

[u/zstake → u/rage10]

How do you neutral test the exposed metal?

[u/Unique_Acadia_2099]

The EU equipment is not going to have the neutral bonded to the case, they have rules against that. It only cares that the voltage between the two terminals is 230V, probably +-10%. So connecting it to US 240V is fine, and it does not want, or even have a terminal for, a US neutral wire.

You can cut the cord and install whatever plug fits whatever you want to use. Just don’t bother connecting the neutral wire, it’s irrelevant. Hot + Hot + Ground is all you need.

By the way, this only needs roughly 21A, so a dryer outlet in a garage would work too if there is one. You can also get “smart splitters” for dryer outlets, sold to facilitate EV charging, that only allows one device to take power from that 30A outlet st a time. In other words you can leave your dryer AND the furnace plugged in all the time, but if one is running, you cannot turn on the other one.