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Questions tagged [outlet]

The tag has no usage guidance.

7
votes
4answers
2k views

Is it Safe to Plug an Extension Cord Into a Power Strip? [closed]

Just a bit of context, I am a technology enthusiast. I love everything from software to hardware, Windows to Linux, Computer to Phone, and everything in between. So, I wouldn't be surprised is my ...
0
votes
2answers
69 views

How does USB port on a power strip detect the optimal current output?

I am looking to buy a power strip with USB ports and came across this one online. The description says "Top-notch USB smart charging technology which can detect and deliver optimal current output up ...
0
votes
1answer
198 views

Is it safe to use my multimeter to test UK wall outlet voltage?

From the question it should be clear I'm no expert. Just want to learn. I have a digital multimeter. If I connect the multimeter to hot+ground & hot+neutral on the 240v 50hz (max ~30A) AC wall ...
2
votes
2answers
102 views

Please help with safety of this circuit. Safe to plug in?

I have been working on this circuit as a project for school for a few months. Here is the schematic It is a pulse generator that produces 100ns pulses at 220VDC. These are used to drive an ...
-3
votes
2answers
499 views

Does an electrical outlet radiate EM waves? [closed]

Please consider all cases even with a tiny values. If plug two separated wires to each terminal of electrical outlet, like shown, will it radiate em waves? ...
7
votes
2answers
1k views

In North America, why is the wide prong neutral instead of the narrow prong?

The wide prong is neutral on 15 amp US power outlets. Is there a reason it was designed this way, or could the narrow slot just as easily have been neutral instead? Was this design decision ...
-5
votes
2answers
66 views

Electrical energy saving [closed]

"You can not pay for the light! This CUTE for years was..." I wonder, what will happen if to do what is illustrated on the picture. I think there are two cases: Hot terminal of left outlet connect ...
-1
votes
1answer
68 views

What products can be used power LEDs from an wall outlet? [closed]

I am currently working on a project that will be a type of night light that plugs straight into a wall. What parts can I use to convert the wall outlet voltage into that which can be used by a couple ...
-10
votes
3answers
156 views

Is it possible to request a mapped diagram of electricity usage from your provider? [closed]

Whenever I see our electric bill, it just shows the amount owed, and the amount used (in kWh). However, it would be really nice if we could request or pay a premium per month, for a service that ...
3
votes
5answers
175 views

Grounding conductor meant to protect electrical devices?

I had a home inspection performed on an old house recently. The inspector noticed that some of the outlets had an unconnected third prong. He told me that the absence of a grounding conductor on the ...
0
votes
2answers
85 views

How can I make an OR gate out of two sockets

I have some lights that go into the wall, that I've plugged into this smart outlet so I can control these through my phone. I want to also be able to power them through a movement activated sensor. ...
10
votes
4answers
2k views

What is the name, if they exist, of PCB mountable 120 AC outlet connectors?

I am working on a self device which will plug into the wall, similar to this Wifi extender. I am having trouble finding a way to attach the AC connectors to my design. I am considering mounting a ...
1
vote
3answers
159 views

Why does Macbook (with a alumnum shell) use a 2-prong plug instead of 3-prong plug? [closed]

Here says that devices with metal shells usually use three-prong plugs. Three-prong plugs are for appliances that require the ground connection for safety. Most appliances that use a metal ...
1
vote
6answers
207 views

Where does electrical power come from?

I live in Brazil, our residential electrical outlets are 127 VRms, 60 Hz. So if I were to plug a fan (AC motor, forget anything ...
-5
votes
3answers
92 views

Fear of electric arcs on a multiple outlet [closed]

I am physically near a multiple power outlet of the following model: The official page of the article is PowerCube |Extended| My doubt is: each outlet seems to close to each other. Should I fear ...
-3
votes
1answer
87 views

Smart power outlet [closed]

Is there such a thing as a power outlet that detects when a device is wanting to draw power (to operate) and turns on, and turns off when the device is not operating? Icing on the cake would be that ...
1
vote
4answers
898 views

What is a single socket to ground-only plug adapter for electrical outlets called?

A three-prong to two-prong adapter is also known as "AC ground lifter" or "cheater plug". What is a single socket to ground-only plug adapter for electrical outlets called? It's a single socket ...
2
votes
3answers
260 views

Relay-like behavior without constant power

I was wondering if there is someway to have relay-like behavior, but without constant power to the relay. For example, if my understanding is correct, if I wanted to control power from an outlet using ...
-7
votes
1answer
125 views

Prong broken in outlet. Will it still work? [duplicate]

So one of the two prongs for my laptop charger broke in the outlet. If I were to plug my charger into the outlet and turn it on, would it still charge my laptop? Is this safe? Here's how the head of ...
4
votes
4answers
5k views

ESD - Is it safe to connect yourself to an electrical outlet?

Is it safe to connect yourself to an electrical outlet? Either directly or indirectly. I would prefer to not connect myself directly to an electrical outlet, via (as I've heard) attaching a wrist ...
2
votes
2answers
481 views

How do you calculate the VA value of a relay?

For my capstone project I am building an outlet which can be controlled using WiFi signals. I am having trouble finding a suitable relay for this device. The relay I first used was a latching relay (...
0
votes
2answers
156 views

Confusion with RCD principle of operation

I understand that an RCD is a device that interrupts an ac circuit (usually in outlets) if current between live and neutral/ground is not the same, indicating something is wrong with the circuit. It ...
-1
votes
1answer
142 views

What kind of coil do I need for wireless power transmission?

My project: I am trying to design a system for a school project that will help with electrical safety. My idea is a wireless electrical socket/outlet. It will use a transformer to convert 120v to 6v, ...
0
votes
1answer
517 views

Changing Wattage on a Heat Pad?

I'm working on setting up a heater bed for my 3D printer, and looking for some help / sanity check on adjusting the heater input. I've got a Kat's Automotive Heater pad (150W, 4" x 5") attached to an ...
6
votes
4answers
528 views

Why not include a thermal fuse in electrical outlets?

I have found myself reading reports of fires lately, including some that started due to high-resistance connections in electrical outlets and switches. A load on a high-resistance connection can ...
0
votes
5answers
122 views

Plugging the same device on a jack of smaller tension will draw more or less current? [closed]

I'll put a set of ''right's''numbered based on my current assumptions, so if one of them is wrong, you can just point a couple out. Let's say I have a device that is labeled ''660W/220V'', so It ...
3
votes
4answers
677 views

Hot and neutral have similar voltage to ground - finding the problem

I have an APC battery backup and surge protector for my computer. It has a light, labeled "Building wiring fault." This light is on, and my computer will not start. I am unemployed and my landlord is ...
0
votes
1answer
2k views

Why did sparks fly when testing outlet frequency?

I'm using a multimeter (Mastercraft 052-0052-2) and I decided to see if the frequency of an outlet would read 60hz. I switched my multimeter to the FREQ setting and plugged the RED test lead into the ...
-1
votes
2answers
394 views

What are the dimensions of US outlet holes? [closed]

I am specifically referring to the standard NEMA 5-15 three hole outlet that is used in North America. What are the dimensions of the holes in the outlets? Surprisingly, I am having difficulty in ...
1
vote
0answers
1k views

Don't reversible 2 prong plugs have to account for orientation?

I don't know much about electrical hardware, so forgive any naivety. Anyways, I've been wondering: since 2 prong plugs (the reversible ones whose prongs are the same size) can be plugged into a ...
0
votes
2answers
171 views

Outlet grounding confusion

I don't have much AC knowledge, but I am willing to learn. I've been surfing the web to find out more about outlet grounding. I still want to know more, that is why I am asking this here. Grounding ...
2
votes
2answers
687 views

Smallest 2 Pin AC outlet socket [closed]

For a home automation project I need to source panel mounting electrical outlet sockets which are as low profile as possible and are rated at least 200 watts. Something like a female version of these ...
0
votes
1answer
798 views

How variable is a typical U.S. 110V outlet current?

How much does the power vary in a typical U.S. wall outlet over time? Note: lightning spikes are an obvious event that seem like will surely cause a massive power spike, hence "surge" protectors.
17
votes
7answers
7k views

Why can sticking fingers in an electric outlet kill you?

I just wanted to learn some differences between volts, amps, ohms and so forth and came up with this question. If your skin has 100k ohms resistance and the outlet is 220v wouldn't the current flowing ...
3
votes
2answers
2k views

How to connect a relay to 220 Volts outlet?

I used relays before but just for simple 5V DC signals control using a Raspberry Pi. Now I'm quite cautious and would like to ask for some help from professionals because I'm not planning to set my ...
3
votes
2answers
833 views

Phantom Voltage When Near Outlet?

I am pretty new to electronics, and have mainly worked with DC circuits. I'm majoring in Computer Science, but I also find electrical engineering interesting, so I am learning as much as I can. Well, ...
0
votes
1answer
323 views

What is the name of this AC power outlet? [closed]

I have these power outlets on the ceiling in a (newly built) house in Sweden, they are meant for lamps. I could not find any information on them, what is their name? Power outlet with plug. The hole/...
1
vote
2answers
639 views

Java/Arduino Controlled 120VAC Power Outlet

I'm working on a project with an end goal of controlling a power outlet with a Java program. Currently, I have the relay wired to outlets, a 3 prong 120 VAC plug, and my Arduino. Everything works as ...
-5
votes
2answers
465 views

how would it feel if I put paper clips in a U.S. outlet? [closed]

One paper clip for the left opening and one paper clip for the right opening of one single U.S. outlet. The paper clip on the left in my left hand and the paper clip on the right in my right hand.
3
votes
2answers
660 views

Actual/theoretical benefits of round or flat outlet prongs

What might be the reasoning for European connectors having rounded prongs while USA and UK connectors are primarily flat pronged? Please correct any mis-tagging.
4
votes
3answers
1k views

Problems without ground, Amplifier & Exploding surge protector?

Not sure if this is a common issue, or how to formulate a single question, so please feel free to edit. I'm just trying to understand the situation and don't know where else to turn. I have an ...
0
votes
4answers
149 views

What is this electronics component?

What is the yellow component shown here? This is off a Outlet USB phone charger.
2
votes
3answers
1k views

Controlling a 220V European outlet from Arduino

I want to use an Arduino to control my 220V outlet. I have searched the web and stack a couple of hours and all I found was this product from Sparkfun and Adafruit, but it does only take 110V and it ...
1
vote
1answer
137 views

Determine if outlet is truly 20A [closed]

My breaker panel shows the island and wall receptacles (two separate breakers) in my kitchen have 20A breakers. I noticed the outlets do not have the "T" shaped plug, making me think they are possibly ...
1
vote
3answers
18k views

How did I survive a short hand-to-hand 230V shock? [closed]

About 5-10 years ago (can't remember when exactly), my father asked me to unplug a lawn mower from an ungrounded power outlet with no sunken part (the kind which had been outlawed by the EU for a few ...
0
votes
1answer
401 views

Tech stereo damaged by dimmer switch outlet, why? [closed]

A low end Tech stereo was plugged into an electronic dimmer switch outlet. The stereo was only a few years old and was functioning properly prior to plugging into a dimmer controlled outlet. I ...
0
votes
1answer
2k views

Do unused outlets consume electricity? [closed]

My understanding is that unused outlets do not consume electricity, but I came across a company which sells outlet covers saying: Saves energy by helping reduce drafts through vacant receptacle ...
3
votes
5answers
12k views

What does hot and cold mean on an AC outlet?

So I sometimes hear that the outlet has a smaller hole for hot and larger for cold so its harder to stick your finger in hot. But if it is an AC wave, shouldn't they both be the same, because they get ...