[Jukebox-list] Grounding Issue

[Ron Rich]

Don't know if this is true--was once told that 60 Hz was chosen because at anything less, humans can see it in an incandesent light (I know I can sense it anytime I'm somewhere that uses 50 Hz). What I was told  was that Westinghouse, who "invented" (while one of Edsion's "tinker-ers") the  60 Hz AC that we use today,   hated the "flicker" of less than 60Hz.
  Ron Rich

Jens Hultgren <drjukebox at gmail.com> wrote:
  This is true, you will be ground, esp. if you are barefoot on a wet floor.
However, it is even worser if the apparatus is supposed to be grounded with
all its' metal parts, but the tinkerer has forgotten a piece of trim
somewhere on the cabinet. If you then have a short there, you are even more
likely to receive a fatal shock if you're touching say the dome frame or the
selection panel.
So if you're doing a grounding job, it has to be 100%.

I think the GFI is a better bet.

117 vs. 230 Volts and 50 vs. 60 Hz- these can all be fatal. It is
unfortunate that 50 and 60 Hz were chosen as worldwide standard, since they
are the most dangerous to our health. Our muscles are continously contracted
by AC current at these frequencies and we can't let go even if we would like
to. :o(
20 or 100 Hz would have been better choices from this point of view.

Jens


On 5/5/06, tracron at bigpond.net.au wrote:
>
> Over the years I have heard 240v has more kick than 115v but the higher
> frequency tends to upset your insides more when you get zapped, either way
> your still get hurt. the reason for earthing is when a part shorts out to it
> casing or frame it blows a fuse if there is no earth it can still work but
> is waiting for you to be its grounding. because we have a high resistance
> the fuse does not always save us.
> Ron
> ---- Ron Rich wrote:
> >
> > Gary, and All,
> > "117 vac" can also be fatal ! Just "earthing / grounding" an
> electrical item does NOT necessarily make it any "safer". Ron Rich
> >
> > Gary Young wrote:
> > Hi, I agree with Ron, but grounding or earthing as we
> > call it in the UK, is much more important on UK
> > machines as our machines run on 240volts and getting a
> > shock from that can be very serious possibly fatal.
> > The first thing I always do if buying any jukebox or
> > pinball etc is to make sure everything is
> > earthed/grounded properly and check the fuses. I have
> > seen them jumpered with all sorts, silver paper, paper
> > clips etc. Remember fuses are ther for a reason.
> >
> > Gary
> >
> >
> >
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