How do dams hurt rivers, exactly? Is that damage built in – that is, are there ways to mitigate it? On the other hand, do a few million people deserve electricity?
Looking for reasoned arguments. Caveat: solar power is reasonable, but I don't see it replacing the Aswan dam in the next few generations.
I just moved into a new house (in Sydney). We have three old fashioned looking electricity meters
in the meter box. Why are there three? [more inside]
Or what do I have to look for on a portable generator to recharge my camera and tablet. [more inside]
There was a huge lightning storm this morning, in the middle of it my power went out.
All the breakers on my boat are on, all e breakers on the power bollard are on.
The odd thing is that the bollard has power to the meters and register 5v on the ac setting of my multimeter across live and earth.
Also the RCD buttons trip out the breakers. This suggests that it has power. But nothings coming out.
Any ideas for
a) How come it has some power but no output
b) Is there anything I can do.
My electrical skills = I own a nice multimeter
My fear of zappy death = relatively high [more inside]
New York City dwellers: Do you use Green Mountain Energy for your household power? Why or why not? [more inside]
Explain to me the technology of charging devices. Is it mainly about voltage? About current? How close to the "required" values must you be? [more inside]
My computer cycles off without warning, and it's on a battery pack/surge protector UPS. What gives? [more inside]
I need a primer on how (electrical) power works. [more inside]
In 2009, 91.2%
of Seattle's electricity was from hydroelectric sources, and in 2010, 87.9%
was hydro. Is the hydro capacity maxed out, or will it scale up to meet additional demand and maintain that ratio? Here's what I'm getting at: If I were to use more electricity than now, will that incremental power effectively come from non-renewable sources rather than ~90% hydro?
Does flipping a switch on and off rapidly damage electrical equipment? [more inside]
A friend of mine has 20+ old arcade games in his basement. He has essentially set up a small arcade museum at his house. It's pretty sweet! The games are split between several circuits in the house but power is becoming a concern. These old electronics are sensitive to spikes and low voltages and we want to keep them running as long as possible - most of the circuit boards are not made and difficult to replace or repair. What should we consider for 110v line conditioning? [more inside]
After months of rambling on the wonders of waffles to my UK housemates, I was gifted the best present ever...a waffle maker
! I am desperate to make this thing work. Need electrical advice. [more inside]
I'm about to teach a soldering class to kids, and it occurs to me that I may blow a fuse in the room that I'm doing the event in if I plug too many in at once... Any idea of how to gauge how many I can plug in simultaneously? This is the soldering iron I have. http://www.elexp.com/sdr_5258.htm
Ideally, I'll plug in 12 at once... thank
Calling all electricians: please explain to me how power surges work. [more inside]
How the heck is this outlet 'grounded'? [more inside]
Need a step-down converter for plugging a printer sold in the US (110V power) into a 3rd-world socket (240V power). I get the voltage part but watts and amps and such are a bit beyond my electronoobicity. [more inside]
Wires, cables - I hate them. What options are currently available (or really
just around the corner) to make my world wireless. [more inside]
I know you are not my electrician, but: Why does this electrical power outlet no longer work? [more inside]
How can the new Macbook Pros use 90+ watts of power when they only have 85W power adapters? [more inside]
Where to buy a 4 1/2" outlet box that is open on both sides for back-to-back light fixture installation? [more inside]
Is there a simple way to put an electrical outlet on a "two minutes on, five minutes off" duty cycle? [more inside]
What are the potential risks of leaving things plugged in on one end (to an outlet, to a computer) and free on the other end? [more inside]
My laptop power cord's ground prong (the third prong) broke off, and it stopped working in most wall plugs. I ordered a new one and when it came, it didn't have a third prong, but it works fine. Why is that? And more importantly, is there some future situation where I'm going to regret not replacing the old one with a new, three-prong plug? [more inside]
After a move, our computer (an older aOpen desktop) can't sleep through the night. It's fine if we leave it powered on, but if we put it to sleep, it seems to lose power sometime in the night and does not wake up properly in the morning. Will a cheap UPS (this one
, for example) solve the problem? Any other ideas?
Where can I find a compact power strip (that I can travel with) - kind of like the USB octupus
but for electricity. I always run into trouble sharing power outlets at airports etc. I'm living in Europe.
I'm going to be out of town for three weeks. Is it safe for me to turn off the water heater in my high rise apartment? Each unit has its own and I'd like to save water while I'm gone.
ElectricityFilter: How many A\C units can I plug in? [more inside]
Help me buy a generator! Degree of difficulty: 5-ton AC. [more inside]
Does leaving my phone's car charger plugged in to the car at all times significantly drain my car's battery? [more inside]
Trying to figure out just how out-of-whack my Northern VA power bills are. [more inside]
Which uses more electrical power: All of the hotels and attractions on the Las Vegas strip, or all of the hotels and attractions within Walt Disney World in Florida? [more inside]
So the place I work is about to grow and needs more power in the building for more people and a very large serverfarm upgrade. I am a bit unclear on a few topics, mainly related to three phase vs single phase power. [more inside]
Construction electrical: why is this service panel
on sale at more than an 80% discount? [more inside]
Just returned from fabulous 2 week holiday in New York. I Brought back Epson Artisan 800 All-in-One Printer from Staples costing $230. Unfortunately, I cannot use it in U.K., unless I plug voltage converter/transformer products. Has anyone else bought this set over there with more success?
Any advice \ information appreciated.
Please specify me What exact voltage converter product to buy & where to buy it from USA online store. Thanks. [more inside]
What percentage of U.S. power plants can run on either natural gas or residual fuel oil? Please cite source.
Can I damage my laptop by using a power adapter that has a slightly higher wattage than the original adapter? The original adapter was 65W, and the aftermarket one is 70W. The voltage is switchable. My original adapter had a voltage of 18.5V, this one says that if I need 18.5V, I should choose 18V.
Any chance of damaging the computer by using this one? [more inside]
Does anyone have any recommendations on the best power companies to use in Houston, TX? [more inside]
What can cause a house's lights to dim and flash? [more inside]
Why should energy supply companies bother making people houses greener when they are essentially reducing demand for their good? (quite a UK based question) [more inside]
First time living alone, and just got my first electric bill... what's using so much power? How much power does my computer really use? [more inside]
When I plug my MacBook Pro Power Adapter into most/all outlets, I see a blue spark as the prongs enter the outlet. Is this normal? [more inside]
How do national grid forecast demand acturately? [more inside]
Help me understand electricity and physics and how they apply to motors. I have my head around electricity basics and electromagnetism, but I have a few unanswered questions about the more subtle aspects. [more inside]
Can anyone help me figure out what kind of power source I need for my outdoor art project? [more inside]
Working on DIY solar charger from modified garden power lamps. Of course the panels look different than the ones in the pictures! [more inside]
British appliance, US power: can they find happiness together? [more inside]
Anyone know a simple and cheap solar panel setup to run a small boombox about 9-12V DC? [more inside]
When it rains / storms our power inevitably blinks out (usually comes right back online in a few seconds) and we have lost 1 TV and another one is now behaving erratically. Need help coming up with a plan of action. [more inside]
So the electrician said nothing was wrong. But something WAS wrong, only it fixed itself by the time he got there. Help me diagnose this maddening problem our tenant had. [more inside]
2 outlets & a ceiling light stopped working at the same time. None of the circuit breakers were flipped. What would cause this, and how can I troubleshoot it? [more inside]