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Author Topic: Why are Shaver Sockets in the Bathroom Safe?  (Read 16285 times)

Offline chris

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Why are Shaver Sockets in the Bathroom Safe?
« on: 26/06/2007 22:21:32 »
You can't have normal plug sockets in a bathroom in some countries, owing to the risk of electrocution, but you can have shaver (2-pin) sockets. These are usually conveniently positioned right above the wash basin, so it shouldn't be too difficult to drop the electrical gadget i.e. shaver into a bowl of water - so why are these sockets viewed as "bathroom friendly"? Are they wired or limited differently to make them safe?

Chris


 

Offline DoctorBeaver

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Why are Shaver Sockets in the Bathroom Safe?
« Reply #1 on: 26/06/2007 22:23:18 »
Another reason why I prefer a wet shave.
 

Offline DoctorBeaver

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Why are Shaver Sockets in the Bathroom Safe?
« Reply #2 on: 26/06/2007 22:23:53 »
2-pin sockets aren't earthed. Does that make a difference?
 

Offline ukmicky

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Why are Shaver Sockets in the Bathroom Safe?
« Reply #3 on: 26/06/2007 23:37:34 »
2-pin sockets aren't earthed. Does that make a difference?
No that just makes them more dangerous.
 

Offline DoctorBeaver

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Why are Shaver Sockets in the Bathroom Safe?
« Reply #4 on: 26/06/2007 23:39:25 »
2-pin sockets aren't earthed. Does that make a difference?
No that just makes them more dangerous.

That was my initial thought.
 

lyner

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Why are Shaver Sockets in the Bathroom Safe?
« Reply #5 on: 26/06/2007 23:51:00 »
They use a so-called isolating transformer.  Your body is connected to 'earth', through your feet. If you touch the live wire of a normal electrical supply you get the full mains voltage  (230V relative to earth) across you and if you touch the neutral wire you only have  a few volts (about zero relative to earth). With an isolating transformer, the wires are 'floating'.   There is still the full mains voltage between them  but they are both 'isolated' from earth. Whichever one  you touch, only a tiny current will flow through you and its voltage, relative to earth, will be nearly zero - you will get no shock. The other wire will  be at full mains voltage but, as you aren't touching it, you don't get a shock.
Isolating transformers are also used for outside work. ~Those big yellow boxes on building sites which are used for power tools produce a low voltage (110V ac) which is floating. These make life a lot safer in wet conditions.
Oh yes - the isolating transformer in the bathroom outlets is small and will only supply current for low power devices so don't try to plug a tv into one.
« Last Edit: 26/06/2007 23:52:50 by sophiecentaur »
 

Offline DoctorBeaver

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Why are Shaver Sockets in the Bathroom Safe?
« Reply #6 on: 26/06/2007 23:53:24 »
Thank you, that explains it nicely.
 

Offline Bored chemist

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Why are Shaver Sockets in the Bathroom Safe?
« Reply #7 on: 27/06/2007 11:20:09 »
The 110 volt yellow boxes on building sites (at least here in the UK) are not floating, they are centre tapped to earth. (Ugh what an incomprehensible phrase).
The output is 110 volts and the middle of that winding on the transformer is connected to ground. That means that the 2 outputs are only 55 volts from earth and that gives a much smaller chance of getting electrocuted than the 240V mains supply.
 

lyner

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Why are Shaver Sockets in the Bathroom Safe?
« Reply #8 on: 27/06/2007 18:01:18 »
Well well- you live and learn!
Where do they / did they use a balanced system, then?
I realise it's not without its dangers - once there is a small leak to earth on one side, the other side is no longer inherently safe.
I'm fairly sure that the bathroom outlet is floating, though.
 

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Why are Shaver Sockets in the Bathroom Safe?
« Reply #8 on: 27/06/2007 18:01:18 »

 

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