15000btu is the largest and that's a 115 volt basically the same ,you just need a higher breaker is all
yes
If it is a 240 volt conditioner it will stop. If it is a 120 volt conditioner it will stop if it is on the leg that has been lost.
If you are about to purchase a window unit, the answer depends on a few factors: 110/115/120 volt units are generally not available in the larger cooling capacity sizes. If you need to cool one average sized bedroom and have a 110 outlet near a window, this should do the trick, and you won't need an electrician to install new wires. If you need to cool an entire house, then you are going to need a 220/240 volt unit or multiple 110 volt units. If you are talking about a central system, then the furnas, or indoor section will most likely be 110 volt and the outdoor unit 220 and you will need to have it professionally installed anyway.
Doesn't sound like a good idea to me.
Usually in the air handler
12 V
That depends on the size and application of the unit. An automotive system runs off of 12 volts. In the USA, a household unit is 110 or 220 volt.
I don't think you can buy a 4000 volt air conditioner.
Yes you can - with a transformer. Maplin Electronics sell a converter that allows you to plug appliances that run on 110V into the normal UK mains. See the related.
if the nameplate says 120 volt, then yes. but might trip breaker if the circuit is overloaded and or only 15 amps
The wire sizing of any equipment is related to the amperage that the equipment draws. Look on the air conditioner and restate the question and give the amps that the unit uses and at what voltage.