Renovating an old brick boiler house. Love the brick, and don't want exposed conduit all over my walls. I have dedicated an 8"x8" square chase between the two floors, the main HD rig will be on the main floor but still want a secondary rig upstairs. I'm on Direct TV, set up to upgrade to HD in the next few years. The head will be downstairs, connected to the upsairs in that small chase. My question is, will running both 220v and 110v circuits alongside RG-6 and Cat 5e, encased in EMT, have a significant crosstalk over the 10' height of the chase? is there a better conduit for this application than EMT? Larry, would love to hear from you on this. If anyone needs more info to give me a better answer, please mail me at the address on my profile.

Thanks Guys,

Nicolas

I'd be willing to bet that you'll get no interference with no conduit, as long as the power and LV wires are kept 8" apart for that 10'.

However, if it were my job, I'd sleeve the power wires in EMT, since they're much less likely to be added to or replaced than the LV.

Yes, the EMT will help, and it should be grounded to one of the grounding conductors in the power wiring, or via a separate wire.

I agree with using EMT, but would stay away from common ground. A bad neutral would most likely cause 60 cycle hum. If you can use a seperate isolated ground.

True, but notice that I specified a(n equipment) grounding conductor, not grounded (neutral) conductor. There's no advantage to using a separate conductor over a properly-installed one already in use.

using EMT opens the door to grounding issues that wouldn't be there otherwise. I'm not saying not to use it, just be aware that you may cause a few issues while you are fixing a few others. Personally I've had very few problems caused by power lines. sensible prewire and good materials.