Amp, Amperes is current. Volt, and any variation, is tension. There's no direct translation between them.
20 amp on a 12 volt system
Electrically yes it is safe but the pin configuration will be different.
A 15 amp 125 volt outlet is a household outlet.
Can you supply three 220 -240 volt 16.6 amp infrared heaters with one circuit?
I = W/E, 18500/400 = amps
Kvar = Kilo Volt Amp Reactance.
There is zero amps in one kilo volt amp. The terminology of KVA is (K) kilo meaning one thousand, (V) for volt and (A) for amperage. What is missing from the equation is a given voltage. Formula for finding the answer is I = (VA or W)/V .
A volt-amp or VA is equivalent to watts, provided the voltage and amperage are in phase. So 1 kilo volt amp is the same as 1 kilowatt. Wattage, or power, is equal to volts times amps. So the original question is effectively nonsense. The number of amps depends on the voltage. If the voltage is 1000 volts, then there's 1 amp in 1 kilo volt amp. If the voltage is 1 volt, then there's 1000 amps. If there's 50 volts, then the amperage is 20 amps. And so on.
2.083 amps
KVA is kilo volt amp, and one needs to know both the voltage and the amperage, and possibly the phase angle. It is comparable with kilowatts for a resistive load.
KVA means kilo volt amps or kilo Watts. A watt = 1 volt X 1 Amp. Kilo is shorthand for 1000. A watt is a measure of power, which is voltage x amps. Therefore it is not possible to relate voltage to KVA without additional information. Formula wise the above is correct but if you really need the voltage, it can be measured with a volt meter or VOM by putting the test leads across the output terminals of the KVA device.
yes
Yes, you can.
No. At 125 volts, the same 15 amp current results in 10 times as much power. Ohm's Law states that amps x volts = power.
20 amp on a 12 volt system
A 1-amp adaptor can not be used for equipment that draws more than 1 amp. It is not clear from the question which part of your system is 12 v and which is 20 v.
A 20 amp 240 volt circuit can provide 4800 watts.4800 watts / 6 watt per foot = 800 feet.