Re: [CAD_CAM_EDM_DRO] Re: Remember Mr. Bill's servo lite?

Hi Andy,
1) If you stand on the concrete floor or anything that's "ground" and grab
the wire which happens to be 120VAC you get buzzed.
2) If you stand on the concrete floor or anything that's "ground" and grab
one of the wires here (doesn't matter which one) nothing happens because
it's isolated from ground. You'd have grab *both* wires in order to get any
current flowing thru your body.

I don't know why you would ground one leg of the secondary of your isolation
transformer - if you do it's not isolated anymore...

Hope that makes at least a little bit of sense.

/Henrik.
_____

---Original message---


That;s what I don't get, and nobody seems capable of explaining it-they just
say "it is".

Take 2 scenarios:

1) A couple of wires plugged in to an AC outlet at 120VAC. One wire will be
"grounded", while the other wil be at 120VAC above ground.

2) A 120VAC isolation transformer, with the primary plugged in to the same
AC outlet, and the wires attached to the secondary.

Why is #1 necessarily more dangerous? I could think up scenarios, especially
if one side of the secondary is NOT grounded, where #2 would give more
chance of a dangerous electrical shock. But let's assume one side of the
secondary is #2 IS grounded. Why is it safer to have the isolation
transformer?

Andy Wander






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