Three phase and IBM

[Tony Duell]

> 
> On Sun, 20 Mar 2011, Eric Smith wrote:
> > I wouldn't necessarily even trust the schematics of a device.  It's all
> > too common for the published schematics to not actually match the equipment.
> 
> Don't necessarily trust "electricians" or utility companies either!

Err, yes :-(. I haev seen some lethal wiring in my time that was 
installed by so-called 'professionals'. 

Not lethal, but when I was studying at Bristol, we moved a 3-phase pillar 
dril lfrom one lab to the next. Upon plugging it ino to the 3-phase 
socket in said lab, it ran backwards. I probalby violated 
$deity-knows-how-many rules by removign the cover of the motor switch box 
and swapping over 2 of the wires.

However, quite why 2 sockets on opposite sides fo the same wall were 
wired with a differnet phase sequence is beyond me.

-tony