Maybe I'm just naive, but I've got 5 of them mounted externally. They're attached to in-wall rated CAT6 cable, but otherwise aren't grounded or surge protected.

Maybe I'm just naive, but I've got 5 of them mounted externally. They're attached to in-wall rated CAT6 cable, but otherwise aren't grounded or surge protected. None of them are above 60% of the height of the walls they're mounted on, but even if I mounted them higher I'm not too worried.