Entertainment Center: TVs, Stereos, VCRs and DVDs - Home Theater wiring
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michael-mmm
02-20-06, 07:02 PM
I'm working on my home theater project and just figure out the TV and the receiver can be installed only 20 feet apart in my room (room specific requirements). All cables (Component or HDMI cable, speaker cable, TV-cable) will be in a close distance (2 inches) with the rest house power lines. Anybody knows the requirements for shielding audio/video cable from the AC power lines?
BobF
02-21-06, 11:49 AM
Are you talking about running the cables in the wall or just in close proximity to extension cords?
If in the wall, keep them at least 6 inches apart. They can cross within 2 inches, but not run parallel that close.
If in the wall, keep them at least 6 inches apart. They can cross within 2 inches, but not run parallel that close.
paradis2
03-02-06, 11:35 AM
I wasn't aware of this, and have av cables that run parallel to wiring. Is this a safety/fire risk?
classicsat
03-02-06, 11:43 AM
Not so much safet, but an interference issue, so that the AV/Comms/signalling doesn't pick up the AC line.
ironhead1230
03-02-06, 12:35 PM
Any electrical current through a wire produces a magnetic field surrounding that wire. If the current is strong enough that field can cause interference in many different devices. So it is a good idea to keep any sensitive device that could be affected by this interference away from power sources / lines. For normal household current I don't think it is a common problem as long as the cables are relatively well shielded, but if possible it is a good practice.
Here is a link talking about this:
http://www.fms-corp.com/resources_articles_emibroadcast.php4
Here is the part about cabling:
"Interference problems may be present in audio/video/data cabling when placed in close adjacency to conduits, bus-ducts or other electrical distribution equipment containing high AC current conductors. ELF magnetic fields naturally emitted from such conduits or bus-ducts may be sufficient in magnitude to induce troublesome levels of interference AC voltage on adjacent signal cabling. The potential for such interference is markedly greater when signal cable runs closely parallel AC power conduits for extended distances."
-Mike
"The greatest trick the Devil ever pulled was convincing the world he didn't exist."
Here is a link talking about this:
http://www.fms-corp.com/resources_articles_emibroadcast.php4
Here is the part about cabling:
"Interference problems may be present in audio/video/data cabling when placed in close adjacency to conduits, bus-ducts or other electrical distribution equipment containing high AC current conductors. ELF magnetic fields naturally emitted from such conduits or bus-ducts may be sufficient in magnitude to induce troublesome levels of interference AC voltage on adjacent signal cabling. The potential for such interference is markedly greater when signal cable runs closely parallel AC power conduits for extended distances."
-Mike
"The greatest trick the Devil ever pulled was convincing the world he didn't exist."