How natural is it to revise a 120v outlet to a 240v? I have to put in a foreign air conditioner and I believe...

I have to put in a foreign air conditioner and I believe it needs more voltage than the standard wall outlet. What wishes to be done for the circuit to support the air conditioner? It is a window nouns condition which is only about 6 foot from the circuit box. I am pretty handy and a quick learner, but should I have an electrician do the profession or is it fairly straight forward? Any idea on cost to do this?
In my breaker box I enjoy a blue...
Your a/c is probably not a 240 volt---read the box and see.It might be a 20 amp instead of a 15 amp. If it is a 20 amp--you need to change the breaker within the panel to a 20 amp and you need to run 12 gauge (12-2) romex to the outlet.You cannot in recent times change to 240 volt-especially since I highly doubt that it's a 240 volt a/c pane unit. It may run on your standard 15 amp outlet-but could be possibly 20..like I say-check the box or paperwork---it should a moment ago be 15 amp 110 volt.Does the plug look like a normal plug? (like your toaster?)---if so simply plug it in and try it out.
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You are mad have a split system . So dangerous . Get an electrician. Any thing you do invalidates your insurance.Any article that happens to you home and they find out you played with the power automatic no return on claims

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Generally to increase the voltage you hold to tap off of your 240 input to your circuit box vice your 120, which vehicle you'll be replacing the 120 breaker with a 240, and then lifting the lead for the breaker on both sides, splicing into 240, and removing 120 to the breaker entierly. Some breaker boxes use bus bars, which are a lot easier to work beside, but generally they're only for commercial. If you're simply wanting one 240 outlet, you can find the junction box, disconnect and de-route the wiring from the outlet (a great time to route the latest wiring by using the old), and splice the new electric wiring directly into either a 240 junction box, or directly at the breaker. If you're breaker is already close to self fully loaded, you'll need to add a unusual breaker for your one outlet (look at the amperage and wattage of everything on the breaker). If you're lucky enough to have a 240 T-junction box right next to your 120 junction box, you may enjoy enough play in the existing electric wiring to not re-route wire, but that rarely happen. As far as overall difficulty, it's not too bad, but it is time consuming, and there's no such thing as too much extra insulation.
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You have need of an electrician. It's not just a matter of shifting the outlet, it's the entire circuit from the power box of your house. (And may I say that if you didn't know this, you are not *handy* with electricity, so please don't do it yourself.) An electrician will probably charge a hundred bucks or so, but powerfully worth it.
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Answers:    Actually a well brought-up electrician can do it with what you got.if its no 12 copper chain..it's not legal...but it is fine.my big table saw runs that way adjectives the time..I also have more on it ..but I'm careful not to o.d., but i've have 4 tools running at once.just turn your neutral into a hot leg.and your ground become the neutral..I didnt say that did I?:)You enjoy to rework panel end also..have fun you won't burn out.