No, you can not you change the wiring of a single phase appliance of 2.4 kw that works on 240 to 400 volts 3 phase 60 Hz supply. They are two different electrical systems.
With the minor voltage loss in the wiring, the voltage drop across a single appliance is the total voltage in the circuit, and doesn't change when more devices are added in parallel.
If you have a short in an appliance or wiring, the fuse will blow to keep a fire from starting in your wiring.
To prevent an overload or short from causing the wiring in the circuit supplying power to the appliance from overheating and possibly catching on fire. The fuse is there to protect the wiring and not what is plugged into that circuit.
A fuse link will melt and interrupt the flow of current to the appliance before it can get high enough to damage the appliance or wiring.
Possibly in your appliance parts store, or online.
The wire recognized by your governing body to mean "ground" is the wire an appliance connects its metal base to ground, via the household wiring. In the US that wire is green.
Assuming inside the lighting/distribution panel, the Neutral bar is "bonded" to the ground bar. Then the neutral prong (usually larger) of the receptical is then directly wired to the Neutral bar in the panel. The above technique keeps the NEUTRAL at GROUND potential, however, the metalic frame of the appliance remains UN-GROUNDED if the supply cord is only 2-wire. The NEUTRAL connection inside the appliance is not allowed to be bonded to the frame of the appliance. Therefore, the un-grounded metal frame of the appliance can become a shock hazard if there is a fault in the appliance's internal wiring
It is not just the outlet, but the wiring and breakers that need to be compatible with your 240 Volt appliance. Get an electrician to look at your requirement.
No, that adaptor can not supply a 6 amp load because it's limited to 1 amp, most probably by the size of the prongs and/or the internal wiring.
I assume you mean : will AC wiring carry DC, and the answer is yes. But many appliances require AC to work.
Possibly at your local appliance parts store, or online.
Possibly in your local appliance parts store. -Or online.