[ale] wiring two buildings

[Jhubbs at niit.com (Jeff Hubbs)]

> Why couldn't you do something simply and put UPS boxes 
> on either end of the cable and use them to regulate the 
> voltages on the hubs and the line?

That won't help.  UPSses pass the ground through to the system, as well they
should.  UPSses like the APC Back-UPS 500 that offer surge protection for
phone or Ethernet lines (or simple surge protectors for same, which APC also
makes) will intentionally shunt a common voltage to ground if it rises high
enough, but I'd only rely on that for protection if I absolutely had to.  

 
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