If you are talking about a 4-wire branch circuit you'll need to start with a 220 VAC breaker. It will have two terminals. Connect black and red wires to the two terminals. Doesn't matter in which order you make this connection. The white wire goes to the neutral bus bar where all other white wires are connected. The green or bare wire goes to ground bus where other bare wires are connected.
U.S. 240 VAC breakers are always double pole since they are protecting two legs of the circuit.
220 volts alternating current
How to increase 220 VAC to 400 VAC? Please advise me about it.
In an emergency it will heat half your oven or half your water heater because you only have half the supply voltage. The wattage must still meet the demand for the half power, Some special connections may be necessary to use 110 temporarly on the 220 circuits.
Should be about 120 VAC.
They are in tandem because they power a 220 VAC circuit, rather then a 110 VAC circuit.
U.S. 240 VAC breakers are always double pole since they are protecting two legs of the circuit.
220 volts alternating current
How to increase 220 VAC to 400 VAC? Please advise me about it.
you should have three wires into the panel. two of them go to the double breakers or pull switch and the last is the ground lead. You can pick up 110 vac from one side of either breaker and that ground connection. DO NOT connect to the both breaker wires as that will be 220 vac
0.5 Metres roughly
In an emergency it will heat half your oven or half your water heater because you only have half the supply voltage. The wattage must still meet the demand for the half power, Some special connections may be necessary to use 110 temporarly on the 220 circuits.
If the Shop Vac is tripping the breaker to a house turn other electronics off while it is in use. The power in the house should be checked out by a electrician.
It is always good to check with a Volt Meter. With a 220 to 240 VAC oven you would connect the grounds which should be Green and Bare wire. The other two can be connected either way with the same results. Turn off breaker to oven before doing any work. Get an electrician if you are unsure in what you are doing.
Dubai uses 220 VAC at 50 Hz (in the USA, we use 120 VAC at 60 Hz). They also use the G type plug.
Assuming this is standard house voltage of 120 VAC your 4500 Watt heater will draw about 37.5 amps. You would normally install a 50A breaker and would have to run 8 gauge wire.
Should be about 120 VAC.