"Bonding panels via the LAN cards?
As a matter of fact, twisted pair LAN cards are isolated (with isolation transformers) from ground to a minimum of 1500V per IEEE 802.3 speficiations."
The LAN output is an isolation transformer but if you have a high frequency transient it will go right through that transformer and the baseplate of the PC is tied to the EGC via the power supply case and DC ground via the grounding pads on the system board. That will not show continuity from machine to machine via the LAN but it will still couple a transient.
We had so much trouble in one of our installations (Holiday Inn Ft Myers) that we actually ended up running a bond wire from PC frame to PC frame, just to prove what was happening.
