Why current from a socket is dangerous to people?

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Discussion Overview

The discussion centers on the dangers of electric current from sockets and the conditions under which electric shock can occur. Participants explore various scenarios and factors that contribute to the risk of electric shock, including the role of insulation and the conductivity of different materials.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants note that while rubber mats and shoes are used to prevent electric shock, many common floor materials are good insulators, raising questions about how current can complete a circuit.
  • Others argue that extra insulation is beneficial, with rubber being highlighted as one of the best insulators.
  • One participant emphasizes the importance of assuming that the surface one stands on conducts electricity, advocating for the use of tested insulation materials.
  • It is mentioned that electric shock can occur without needing to complete a circuit to the ground, as touching different parts of a socket can create a path for current through the body.
  • Concerns are raised about factors such as sweaty hands or feet, which can increase conductivity, and specific scenarios like stepping in dog waste or on thumbtacks that could lead to electric shock.
  • Anecdotal evidence is shared about a participant's great uncle who experienced severe electric shock due to current concentrating at points of contact with nails or tacks in his shoes.

Areas of Agreement / Disagreement

Participants express varying views on the effectiveness of insulation and the conditions under which electric shock can occur. There is no consensus on the best practices for preventing electric shock, and multiple competing perspectives remain.

Contextual Notes

Participants highlight various assumptions about conductivity and the effectiveness of different materials, but these assumptions are not universally agreed upon. The discussion includes anecdotal experiences that may not be representative of broader scenarios.

Stanley514
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It is known that electricians like to use rubber mats and rubber shoes to prevent electric shock.It meens that be dangerous to the people current should complete its path to the ground.But most of things that lay on a floor such as linoleum, wood and wool mats are themself very good dielectrics.As well as brick and concrete.So how current is able to complete a circuit?
 
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Extra insulation is always good.
Rubber is one of the best insulators, and thus it is (virtually) always an improvement.
 
Are you going to put your life on a gamble that the thing you are standing on is a good insulator?

The only safe option is to assume what you are standing on conducts and provide your own tested insulation material.
 
Nothing has to go into the ground for you to get shocked. If you touched one side of the socket with the tip of your finger and the other side of the socket with your knuckle, the resistance between your fingertip and your knuckle is not very much and you will get lit up!
 
Also a sweaty hand or finger is not what you want touching an electric potential! And as bunny implies, connecting positive to ground can occur via fingers as well as feet on the floor; While resistance between a finger and an adjacent knuckle is likely lower than thru a longer body segment, it's a circuit passing thru the heart that can be especially lethal...

More here:
http://en.wikipedia.org/wiki/Electric_shock#Pathophysiology
 
There are all sorts of scenarios where you could be more conductive than you realized:
-What if your feet sweat a lot?
-What if you stepped in dog poo?
-What if you stepped on a thumbtack that didn't quite make it into your foot?

Also, it is much better to make simple rules that you always follow than to make a bunch of different rules for very slightly different scenarios.
 
-What if you stepped on a thumbtack that didn't quite make it into your foot?

My great uncle (I think. Its my dads uncle) got shocked by like over 1,000 volts back in the 50's or 60's. In the hospital, he complained about his feet hurting like hell. After a day or two they took a better look at his feet and noticed a bunch of spots on his feet where his skin had died. Turns out it was the nails or tacks in the soles of his shoes where the current concentrated at during its travel through him.
 

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