[Sephiroth]

I'm not sure about what arcimedes has said. It's prrolly a terminology thing - "circuit breaker".

I've been using Powerlines for years. I take BT Infinity downstairs from the router upstairs and get the same 50 meg direct to the router or downstairs via powerline.

In my house, we have an upstairs ring and a downstairs rinh, each with their own circuit breaker. If one circuit breaker trips, the Powerline link between floors is broken. It would have to be because there is no power on one floor! But there is no degradation in normal mains behaviour.