15 amp breaker.
Yes you can, However the wire leading out from the breaker must be rated for 30 or more amps, otherwise there is a fire hazard.
You can, but your circuit will be "protected" by a 30 amp breaker. So you'll have to consider the safety issues of having wiring and appliances that can draw up to 30 amps before tripping the breaker. Will the wiring and circuity support that much current without damage? If not, then switch to a 15 or 20 amp breaker.
A double breaker is a breaker that has 2 switches on it. One of the switches is 20 amps and the other is 30 amps.
Answer for the US: Breakers are rated in amps, not watts. However, a 15A breaker can handle 15 amps, or about 1800 watts (using 120V), or 3600 watts (using 240V). However, this is only rated for noncontinuous loads (those not lasting for more than three hours). For continuous loads (loads lasting three hours or more), one must derate the circuit breaker by 80%. So for continuous loads, that same breaker should only have 1440 watts (using 120V), or 2880 watts (using 240V) on it.
I believe what you need for a 3 bed house is 60 amps.
You need amps
1.9 amps
The burners will most likely be 240V. By keeping the range at 240 volts it will use less amps that at 120V. Say a range and oven is rated at 9000 watts. Watts = amps x volts. 9000/240V = 37.5 amps. 9000/120V = 75 amps. As you can see at 120 volts the amperage is double over 240 volts. You would need a 100 amp breaker and #4 wire to accomodate the range on 120 volts.
Check the MFG for the amps it uses, if it is suppose to be on a regular 20amp line, then replace the breaker with a 20amp breaker. With the 30amp breaker,it will work, but if there is a surge, you could send too much power to the appliance and fry it. Most refrigerators, are just on a regular 120v household outlet. Besides a 30amp breaker must have 10ga wire, if the wire is 12ga,it can not be attached to a 30amp breaker.
The formula you are looking for is I = W/E. Amps = Watts/Volts.
KA stands for kilo-amps, or thousands of amps. Thus a 2KA breaker means it will trip when the load exceeds 2,000 amps.
It Will To The Exception That It Will Take Over 50 Amps To Kick The Breaker. You Will Have Two Circuits Protected By A Double Pole Breaker. You Could Remove The Strap On The Breaker That Holds The Two Together Giving You 25 Amps Per Circuit. ie One Breaker For The Black Wire And One For The Red Wire. Good Luck No, you will need to remove the double-pole breaker and install a separate breaker for each circuit, preferably no more than 20 A. The neutral and bare grounding wire can serve both circuits.