Reply To: Extending BT router to my Garage I have a garage with a metal roof but stone walls. The BT router is in the back room of the house which faces the garage some 20 – 30m…

[Grisu]

I think there is no need for any protection for 30m only to the garage.
I have 3 houses connected via LAN for years with no problems distance about 50m.
They all have the same mains from street and so are one same voltage potential.

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