Baleforce
Arthur Rowe
Yep power cables do work, using products like the TP-Link (which I have) as long as the sockets are on the same circuit. But speed varies wildly and it has not been working too well for me. There is however an unused phone line running exactly from the main router to where I want it, so I was hoping to piggyback on this line instead (I wonder if some sort of phone to ethernet adapter could do it?). If I get a connection I'll retask a spare router I have to broadcast a new WIFI at point B.
it depends on the type of wiring, if it's cat3 twisted pair it could theoretically run 10mb
if its a single pair it won't work as you need two pairs for ethernet
you'd almost certainly have more luck with a wifi system like Eero but thats obviously a spend