18481Re: [mill_drill] Switch Question...
- Oct 1, 2007No, the switch handle should not be "Grounded" to
neutral. It should be grounded to ground for exactly
the reason you encountered. Because neutral in a
single phase system carries current, it is not Ground.
The frame of the machine and any metallic parts not
double insulated should be grounded and it is really
a good idea to ensure that it is, in case your fine chinese
motor should leak a little or uses insulation that will
absorb moisture. With todays 3 wire system this
just shouldn't happen if the ground is connected.
When working in damp locations, I've formed the
habit of very lightly brushing my finger tips across
electrical gear before trusting it. You can detect
even low voltages because it feels "buzzy", for
lack of a better way to describe it. And if it's
actually hot, your reflexes do the right thing.
It comes from the old two wire days when picking
up your guitar or bumping a mic with your lip,
you ran a 50/50 chance of getting zapped the
first time it was plugged in. Reversing the plug
_usually_ fixed it. That's why grounding things
to neutral is a bad idea and they did away with
it. Chassis were never actually tied to neutral
but they usually had a capacitor to neutral to
cut down on hum.
> I have a Harbor Freight Mill/Drill that is roughly 12 years old. I
> purchased it a couple of months ago and have a question about the motor
> switch (where you select the motor to run forwards/reverse). I was
> using the Mill/Drill to drill a quick hole. I normally wear shoes
> while working in the garage but this time I was only wearing socks on
> my feet and I guess my feet were a little sweaty. When I turned on the
> Mill/Drill and touched the screw that holds the switch handle on, I got
> When I investigated what was going on I discovered that a homemade
> powerstrip the previous owner made had the hot and neutral reversed. I
> set these correct and everything is working fine and I'm not getting
> zapped anymore. My question is - should the switch handle mounting
> screw actually be grounded to the neutral or should I open up the
> switch and take a look at why the screw is in the "loop"?
Franklin D. Roosevelt Wrote about that other famous monopoly in 1938:
"The liberty of a democracy is not safe if the people tolerate the growth of
private power to a point where it becomes stronger than their democratic State
itself. That in it's essence, is Fascism - ownership of government by an
individual, by a group or by any controlling private power." But the
conviction of Standard Oil stood. Our government is already powerless
against today's monopoly. Only the people can prevail.
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