Tom Anderson wrote:
On Thu, 16 Mar 2006, wrote:
This, i have to admit, is a puzzle - how the hell is the H&C wired to the
WLL?
It's not. The important thing, however, is the electromagnetic
interference caused by high voltages and alternating currents. This
interference can work "at a distance", and can cause signalling
circuits (amongst other things) to misbehave. I'm sure that we all
agree that it's not a goot idea to mess with safety systems without
suitable safeguards (that is, immunising them).
PhilD
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