I'm re-routing the powerline to my electrically heated hot tub. It
needs to cross walkway, so I'd like to bury it in concrete in a cut that
would also hold the RG-6 coax from my satellite dish. They'd be
parallel about 4 ft. Is this OK, or will it lead to interference? Can
I get away with it if I put the power line in metal conduit? (Can metal
conduit be buried in concrete?)

Thanks for any advice,

Kelly