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#21 | |
For the right price...
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Assume a 60W bulb. Power usage for 15m is 60W/1000*.25 = 0.015kWh. Let's say that the surge only happens over the course of two minutes. (This is a very generous assumption. Notice the bulb is pretty much full brightness from the very beginning.) 0.015kWh*1000/0.0333 = 450W pushed through in that two minutes to make this true. That's nearly four full amps of current running through your average light bulb at 120V. (Average american A/C wall outlet.) Increasing the wattage beyond a certain point heats the filament to unnecessarily high temperatures due to the extreme current, so even spread out over two minutes or more, the filament would pretty much roast if a significant surge existed. Assume 400W computer (Roughly average non-gaming PSU running nearly full capacity last I checked). Let's say we assume that fifteen minutes of "off" time is equivalent to the power lost in the "surge". 400W/1000*.25 = 0.1kWh. With a boot time of one minute (assumed to be when the "surge" happens) 0.1kWh*1000/0.01667 = ~6000W. I don't often see power supply units rated beyond 1kW, or 1000W. To look at this from the perspective of my 850W power supply, if it ran full blast all of the time for 15m (It does not.) then 850W/1000*0.15 = 0.2125kWh, I take a little under a minute to boot completely, to fully (relatively) finished loading, sitting at the desktop with no significant processor usage. So, 0.2125kWh*1000/0.01667 = ~12750W over the course of that minute to make this true. The wiring in the power supply would pretty much incinerate itself if it ran at that pace. Even if we only assume that my computer ran at 300W (It most definitely runs higher than this.) for those fifteen minutes, the resulting surge wattage becomes ~4500W. Still enough to blow the PSU in a heartbeat. tl;dr Your electrician believes false rumors. (That is not to say surges themselves don't exist, just that as evidenced by things not exploding, they are extremely small, on the scale of seconds or less of equivalent run-time.) Not to call out you or your electrician obviously, but in a thread for saving money, may the least expensive theory prevail.
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#22 |
Keeper of the new
Join Date: Apr 2004
Location: A place without judgment
Posts: 4,506
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Yeah it seems like you know what you're talking about. I'd assumed this surge was pretty much instant, though now that I think about it going through 15 minutes worth of power in a split second would probably make any electric device explode.
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Hope insistent, trust implicit, love inherent, life immersed |
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#23 | |
Not a Taco
Join Date: May 2005
Posts: 3,313
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I did a lot of posting on here as a teenager, and I was pretty awful. Even after I learned, grew up, and came to be on the right side of a lot of important issues, I was still angry, abrasive, and generally increased the amount of hate in the world, in pretty unacceptable ways. On the off chance that someone is taking a trip down memory lane looking through those old threads, I wanted to devote my signature to say directly to you, I'm sorry. Thank you for letting me be better, NPF. |
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#24 |
Lakitu
Join Date: Feb 2010
Posts: 4,648
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1. Perfect cold fusion, patent it and make enough money that you never even think about budgets again.
2. Mug the guy perfecting cold fusion, steal his secrets and research and kill him (recommended for the not so sciency). 3. Get a fucking job. This will get easier as you get closer to being broke and homeless as you will search more frantically. 4. Make the ultimate sacrifice and cancel your gaming subscriptions until things pick up. 5. Find a rich family member who you don't like but will inherit his/her fortune anyway and kill him descreetly. 6. Invent time travel and beat your past self into a senseless pulp so that he understands financial responsibility. |
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#25 |
For the right price...
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God, why couldn't I have just found this when I was posting and linked it instead of spamming google trying to find max current ratings for various appliances and running the numbers on this at 4AM?
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#26 | |
for all seasons
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Like pretty much what you should ask yourself is "do I like, or dislike, the idea of someone giving me a free George Foreman grill / hi-fi stereo system / sofa?" If the answer is yes: you should be on Freecycle.
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check out my buttspresso
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#27 |
Love Is Strength
Join Date: Nov 2008
Location: Vancouver/BC/Canada
Posts: 1,135
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Freecycle if your area is good for it, there is about 6kilos of bread left out a day blocks from me due to it being day old and they don't sell that. Good tip, funny too: Less processed foods = cheaper than processed, since processes generally take energy and energy is money. This only really applies strictly to things made up of long shelf-life ingredients, ect.
Buy a rice cooker, buy a costco sack of brown rice. Go to a superstore, buy a lot of beans, there you go, complete protein shell. Different veggies every day, tofu, meat 2-3 times a week if you want to build muscle, fruits post-exercise, gg. Funny thing is, rice, beans, tofu and broccoli can do you on 3-5$/day, add meat for an extra 5-10/week (ground bulk meat, freeze it). Water is free. Alternatively, for around 6-8/day you could go for big batches of chili with brown rice, tofu, meat and beans in it, add veggies (long cooking will degrade veg goodness unfortunately) and garlic and you got yourself a fairly fatty healthfood, delicious too. Stew works equally well, with both you can batch and freeze em for a weekly cook, zap em, no hassle cooking! Either way, chinese cooking came out of the roots of poverty with the goal of health, real chinese cooking is your best bet, start growing food, or start earning more money. |
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#28 | |
Swing You Sinners!
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Also, as I've mentioned, stuff that's useless to you can become treasure for someone else. Like one day a couple of years ago somebody on my local list apparently said to themselves "Man, why am I keeping all these shows I taped years ago when I could have space in my garage" or whatever--and a couple of days later, I end up with the entire run of Doctor Who between Jon Pertwee and Sylvester McCoy and what appears to be most of The Avengers ![]()
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Fifty-Talents Haversham
Join Date: Mar 2006
Location: FABULOUS
Posts: 1,904
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Neighbours have an unencrypted wifi network. I've thought about warning them about it in the past; glad I didn't make that mistake! Quote:
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In short, the biggest change I need to make is my eating habits; I've been eating fairly well up until now, but too much processed food, and too much eating out. That's going to change. More mooching, and more cost-cutting. Thank you all for your advice; I feel fairly confident at this point in my finances for the next while. I'll keep you posted as to major changes.
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<Insert witticism here; get credit; ???; profit!> |
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