Why is it that we use voltages and watts more often than amperages? 9v batteries, 12v car battery, 1000W Microwave oven. But amperages not so much, even though its “half” of what makes power, A*V=W. What property of amperes makes it so “unnecessary” to be aware of?
Bonus: how many amps and volts does a typical 1000W microwave use?
Where I live most people actually do think of household electricity in terms of instantaneous current draw. The power grid is insufficient, so you get rationed grid power throughout the day depending on what area you live in, with the rest filled in by mob-run local power generators.
You pay a subscription based on the maximum amperage and you have to manage your power use accordingly.
🤓☝️ Um that’s functionally the same as a power limit
Yes, but it’s ampere based because it’s managed by a breaker out on the street, and the ampere limit is colloquially understood. “I’m paying for 5A, the bastard won’t give me more” is a perfectly understandable statement. When I was 7 years old I already understood that “we only have 5 amperes during most of the day” and that it meant the microwave wasn’t available during that time. And since the breaker is out on the street, you learn your limit very quickly, since you have to get dressed and go down a few flights of stairs in the freezing cold to turn it back on. If you have an elevator in your building, it sure as shit isn’t running when the generator power is active.
Annoying when you’re using solar to escape this hell electrical system and everyone has to re-learn to think in terms of Watts/VA. I have a table printed out stuck to the wall to “convert” between amps and Watts at 230V. Do you want to explain to grandma which devices are intuitively at 1kW≈1kVA and which are not? No? Then let her keep using amperes, it’s fine.
Yes, the power generators run off diesel, yes, the diesel fumes and generator noise is a problem, yes, we get price gouged by both the generator mobs and the government grid, yes, I hate dieselpunk and think diesel is the most disgusting fuel. The generators give you a much closer wave to 230@50Hz though, so it has that over the grid. Was solar the most expensive thing we’ve ever paid for? Yes. Does it make me feel like a king with a 24 hour battery-backed microwave? Also yes
Gad dang man, that does not sound like a good time.
Five amps?
USian here. My refrigerator expects (and is legally required to have) a dedicated branch circuit of fifteen or twenty amps with nothing else on it.
Been years a since I had to actually apply Ohm’s Law, but I believe since we’re on 120V and most of the world is on 240V, you’d only need half the amperage we do.
You (and apparently most of your fellow citizens?) are expected to run your home most of the day on half the power available to an average American fridge? (Figuring that as 7.5A for US fridge at 220)
Puts our privilege in perspective for sure. If you don’t mind what general area of the world are you in? (Need not be overly specific, just curious about region(
Does any fridge use 1,800W? Even at peak? A small freeze-dryer? I’m holding off on making cheap jokes at the expense of American cuisine, your fridge might be legally over provisioned for some reason, but it’s not drawing this much power. My entire house idles at about 1.1~1.5A, or about 250~350W, if nothing is running but the absolute essentials. And that’s a relevant number for me, I do solar! I do batteries! Every little bit counts. Fridge is the most important thing to power, and literally everything else comes after.
During the financial meltdown/pandemic people ran their fridges for eight or less hours a day because there was just not enough diesel. That’s the time we decided to splurge on solar. If you want more fun anecdotes, during that time I was waiting in line for 3-4 hours for fuel, and then bribing the attendant more than the value of the fuel to let me fill over 20 liters. Not fun times. And I’m someone who was lucky enough to be able to pay his way through the worst of it.
I’m in Lebanon. I too count my blessings. It’s not culturally mandatory to strand your kids at 18 here, nor culturally accepted to have them dodge bullets at school. So you know. Even at the peak of people being harassed by Hafez’s secret police, people were not getting snatched on the street en masse. I don’t have the mental scaffolding to even begin to grapple with your reality my dear. Using the gas because the microwave is unavailable until tomorrow, temporarily stealing my neighbor’s water, angling for favor with feudal lords’ bureaucrats… Problems yes, but problems I understand.
I hope I’m not being too mean here, the US still fascinates me in a way no other potential new home does, even with everything happening right now. How’s that for perspective.