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25 posts tagged with electricity and electrical. (View popular tags)
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You are not my electrician.

I need some help figuring out the wiring in my switched ceiling junction box in order to connect a basic light fixture. In the box I have three pairs of black/white wires and one yellow wire. My fixture has one pair of black and white wires. [more inside]
posted by stopgap on Jan 31, 2014 - 10 answers

Voltage drop, amperage increase?

We had an electrical incident where I work a couple of nights ago, and I'm trying to wrap my brain around it. Our house engineers have maintained systems at 150 amps on legs with 200 amp fuses. The power company reported a power dip, shortly after which we blew two of the 200 amp fuses. What happened? We had a drop in available voltage, so our amperage demand shot up? [more inside]
posted by nevercalm on Jul 17, 2013 - 9 answers

Basic Multimeter Question

I have a multimeter, and a I have a hub dynamo built into my bike wheel. I want to attach the multimeter probes to the wires that power my front light, and see what, if any, power comes through those wires when I spin the wheel. What do I set on the multimeter to see that happen? PS: I know nothing about electricity.
posted by sandettie light vessel automatic on Jun 20, 2013 - 19 answers

My Cooker Wants To Kill Me

Why is my oven crackling and sparking at the on/off switch and will it start a fire in my wall? [more inside]
posted by fruitopia on May 4, 2013 - 11 answers

You are my electrician. Will I ever blow dry my hair again?

Home electrical mystery: Why did tripping a circuit cause all of the GCFI outlets within the circuit to fail (ie none of them can be reset now)? How can I fix this? [more inside]
posted by Slarty Bartfast on May 10, 2012 - 15 answers

How to ground my home electrical in accordance with code?

Help me understand the national electric code with regard to rewiring and updating several rooms in my 1940s-era house. [more inside]
posted by JohnFredra on Dec 6, 2011 - 8 answers

Energy required to turn seawater into drinking water

Assuming an island with its own supply of power via generator and/or solar power, how much electricity is consumed to turn N liters of sea water into potable drinking water? [more inside]
posted by thewalrus on Jul 27, 2011 - 11 answers

Shazam! Off goes the microwave! But why?

My power strip has been spontaneously switching itself to off when my microwave's going. Nothing's plugged into it but that microwave. What's going on? Is the microwave safe to use? [more inside]
posted by cadge on Jan 25, 2011 - 15 answers

How is my bedroom wired? Can I fix this myself?

My bedroom is wired like a Myst puzzle. How is my ceiling light fixture supposed to be powered? If this isn't something I can fix myself, how much might an electrician charge? Pictures and diagrams inside. [more inside]
posted by 0xFCAF on Jan 24, 2011 - 8 answers

Where to buy a 4 1/2" outlet box that is open on both sides for back-to-back light fixture installation?

Where to buy a 4 1/2" outlet box that is open on both sides for back-to-back light fixture installation? [more inside]
posted by Jim Biancolo on Dec 12, 2010 - 7 answers

We are sure you will be pleased with this agreement.

What is a fair way to estimate, over an entire year, the proportion of an electrical bill that is being used for electrical heating? (Previously) [more inside]
posted by porpoise on Jul 6, 2010 - 8 answers

Advice on DIY electrical work

How to route electrical cable around a pipe, a question about a floor box for an electrical outlet in a kitchen, and a good book for general home electrical work? [more inside]
posted by Blazecock Pileon on Apr 21, 2010 - 7 answers

The little PA system that could, I hope.

Will I blow up my PA system? A question of ohms, watts, speakers, amps and the love affair that almost tore them all apart. [more inside]
posted by otolith on Mar 13, 2010 - 12 answers

Current used by florescent lighting at start-up?

I want to add some more florescent shop lights in my basement but I have a question about how many I can safely add. [more inside]
posted by bondcliff on Mar 11, 2010 - 7 answers

Help me not be the annoying new roommate who killed the house.

I am not an electrician. But I'm poor, and I'm not an idiot. Unfortunately, I think I did something stupid when wiring a new wall plug; I accidentally touched two wires together, and now the electricity is off in two rooms. More electrically savvy people: can you help me? [more inside]
posted by koeselitz on Feb 15, 2010 - 34 answers

Which uses more power: Disney or Las Vegas?

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]
posted by Mwongozi on Feb 13, 2010 - 9 answers

Light switch making popping noise.

Calling all MeFi electricians: why does my light switch make a popping noise, and will it kill me? [more inside]
posted by feathermeat on Jul 1, 2009 - 12 answers

Too good a discount?

Construction electrical: why is this service panel on sale at more than an 80% discount? [more inside]
posted by XMLicious on Mar 16, 2009 - 5 answers

What can cause a house's lights to flash?

What can cause a house's lights to dim and flash? [more inside]
posted by Nelson on Sep 8, 2008 - 7 answers

Buying an Oscilloscope

I'm an electrical engineering student/hobbyist looking to buy an oscilloscope. I'd like to spend around $200 ($300 max, probes/shipping included). What should I look for, and where? [more inside]
posted by phrontist on Apr 16, 2008 - 10 answers

Where is the switch?

Why do some electrical appliances lack an on-off switch? [more inside]
posted by Tube on Feb 8, 2008 - 23 answers

How can I use this UK appliance in the US?

British appliance, US power: can they find happiness together? [more inside]
posted by bac on Dec 9, 2007 - 15 answers

Anyone know a simple and cheap solar panel setup to run a small boombox about 9-12V DC?

Anyone know a simple and cheap solar panel setup to run a small boombox about 9-12V DC? [more inside]
posted by Bengston on Dec 4, 2007 - 3 answers

I (don't) have the power!

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]
posted by designbot on Aug 30, 2007 - 15 answers

Electrical Code Question

One residential electrical junction box with wires coming into it from two different circuit breakers, is this to code or completely whack? [more inside]
posted by peeedro on Jan 8, 2007 - 8 answers

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