Danger Danger Will Robinson! Make sure you are using the correct cable to connect your PCs together.
Having had the misfortune to connect two PC power supplies together via a cable, I can tell you that data cables aren't really up to carrying 30+ amps for more than about 0.1 seconds before the entire length of cable ignites.
(I was using a software/hardware emulator pod in place of the CPU in one machine for development. The pod had been wired up incorrectly - not by me, I hasten to add!)
Mik
[This message has been edited by mik (edited 07 January 2001).]