[Gllug] OT: Merging UPS outputs

[Chris Bell]

On Sun 21 Aug, Liam Smit wrote:

> 
> Many appliances don't require an earth pin. The appliance is designed
> and built in such a way so that this is not an issue. For example my
> electric razor, I'd have to remove the plastic casing and then plug it
> into the wall and then use wet hands in order to get a shock.
> 
   So are you suggesting that every building should be wired with sockets
that look pretty and have no earth, sufficient for every need, plus sockets
which do have an earth, sufficient for every need, including future
proofing? Buildings are already supposed to have sufficient outlets without
the need for trailing sockets.
> 


> 
> Electricity is strange stuff, I've touched a cable where it was joined
> and received a buzzing sensation (like pins and needles) in my arm and
> the power did not trip. It was supplying a running fridge. Took me a
> while to realise that each time I felt the buzzing feeling I was
> touching the cable supply the fridge. I was barefoot at the time on a
> concrete floor (garage).
> 
   You were lucky that you just received a tingle, the floor was probably
fairly dry. I was asked to provide first aid for someone who had grabbed a
handle that turned out to be live, his muscles tensed, and the palm of his
hand was white and totally shredded before he could lever it free.
   AC mains often tends to make your muscles throw you clear, we were told
to test any suspicious objects using the back of our hand if there is no
safe way, because it may be painful but you will be thrown clear. If it is
live DC your muscles are even more likely to tense and hang on, less likely
to throw you clear.


-- 
Chris Bell

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