I used Cat 6A to connect my wireless repeater to my Node 2. Probably overkill. I used el cheapo Monoprice cable. It's very inexpensive and seems to be well built. I probably should have used megabucks audiophile Ethernet cable, but it's for a bedroom system and sounds great to me.
The Monoprice meets UL Code 444 and National Electrical Code TIA-568-C.2 fire and safety standards, so it sounds like it should be OK in a wall. I am not an electrician though and can't say that with certainty.
The Monoprice meets UL Code 444 and National Electrical Code TIA-568-C.2 fire and safety standards, so it sounds like it should be OK in a wall. I am not an electrician though and can't say that with certainty.