If you plug a cord into an outlet and sparks fly while plugging it in

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Discussion Overview

The discussion revolves around the phenomenon of sparks occurring when plugging a cord into an electrical outlet. Participants explore the implications of these sparks, including potential hazards such as electrocution and fire risks, while considering different scenarios and types of sparks observed.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants inquire whether touching the sparks can lead to electrocution, especially if the sparks are long.
  • There is a question about whether sparks are more likely to occur when plugging in or unplugging devices.
  • One participant asserts that any sparking from an outlet indicates a fire and electrocution hazard, suggesting immediate replacement by an electrician.
  • Another participant discusses the expected behavior of sparks when plugging in a charger, relating it to the breakdown voltage and current draw of the charger transformer.
  • Participants differentiate between two types of sparks: arcs from the plug to the outlet and sparks shooting off the plug into open air, with varying implications for safety and potential harm.
  • There is a mention of visual phenomena, such as a small flash of blue light observed in low light conditions, which some find intriguing.

Areas of Agreement / Disagreement

Participants express differing views on the safety implications of the sparks, with some emphasizing the need for caution and others suggesting that certain types of sparks may be harmless. The discussion remains unresolved regarding the specific conditions under which sparks may pose a risk.

Contextual Notes

Participants reference varying experiences with sparks, indicating that the nature and length of the sparks may depend on specific circumstances, which are not fully defined in the discussion.

Simfish
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Can you get electrocuted if you accidentally touch the sparks? Especially if the sparks are long? (i've had some disturbingly long sparks before)

And is it a fire hazard if the sparks hit something such as paper?
 
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Sparks while you plug IN or while you UNplug ?
 
... if an outlet sparks when you plug something into it, you should have an electrician replace it immediately. Yes, it is a fire and electrocution hazard.
 
russ_watters,

Can you elaborate? Often, when I plug in a charger, there is a small spark. But since the primary coil of the charger transformer is always drawing current, I would expect a spark when the gap between outlet and plug gets below a certain distance (call it 0.1 mm), corresponding to the breakdown voltage.

Or is that not what you mean?
 
Andy Resnick said:
russ_watters,

Can you elaborate? Often, when I plug in a charger, there is a small spark. But since the primary coil of the charger transformer is always drawing current, I would expect a spark when the gap between outlet and plug gets below a certain distance (call it 0.1 mm), corresponding to the breakdown voltage.

Or is that not what you mean?

This is what I was thinking the OP meant. When all of the lights are off in my house and there is only a tiny bit of ambient moonlight coming through my window and I plug in my computer, I can see a smal flash of blue light in the vicinity of the outlet. It's awesome.
 
These sparks, are they:
- lines of arc from plug to outlet?
or are they
- shooting off the plug like little arcs into open air (like a sparkler)?

If the former: yes, you could get electrocuted. That arc is a circuit of electricity.

If the latter, no, you will not get electrocuted. Those sparks are vapourizing microscopic bits of metal. They are mostly harmless. Yes they are hot enough to glow, but they are so tiny that they simply have a negligible amount of heat to transfer - usually not enough to heat up a piece of paper to ignite. They could even land on you and you might not feel it.

That being said, it is possible to have sparks big enough and often enough to actually "sting" you or set something on fire.
 
Saladsamurai said:
This is what I was thinking the OP meant. When all of the lights are off in my house and there is only a tiny bit of ambient moonlight coming through my window and I plug in my computer, I can see a smal flash of blue light in the vicinity of the outlet. It's awesome.
I've never seen that, but the OP used the words "disturbingly long"...what you describe doesn't sound "disturbingly long" to me.
 

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