cypherstream
There's no place like 127.0.0.1
join:2004-12-02
Reading, PA
clubs:
 ·Cingular Wireless
edit:
February 4th, @08:03PM
| reply to Test Clees
Re: Wireing a home for cable
I have a question to add... not to hijack or anything but it's along the lines of wiring a home for cable.
Can you run RG-6 lines along romex power within the same studs or channel? My friends brother in law is finishing his basement and asked me this the other day. I wasn't 100% sure, but I did ask what kind of cable it was. RG-6 is plastered on the jacket, not QS, but it's still RG-6 so I said OK.
I know you shouldn't run unshielded cat5 real close along power because of inductive interference, but coax is shielded so I figure it shouldn't really hurt it correct? If there's a building code thing regarding it, what's PA's wiring code? |
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burner50
Pinlifter
Premium,VIP
join:2002-06-05
Broken Rail | coax is shielded... the only shielding the cat5 has is the twist...
It would be just fine to do that |
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egnlsn
Premium
join:2003-09-26
Salt Lake City, UT
·Digis
 ·Vonage
| reply to cypherstream
said by cypherstream  :I have a question to add... not to hijack or anything but it's along the lines of wiring a home for cable. Can you run RG-6 lines along romex power within the same studs or channel? My friends brother in law is finishing his basement and asked me this the other day. I wasn't 100% sure, but I did ask what kind of cable it was. RG-6 is plastered on the jacket, not QS, but it's still RG-6 so I said OK. I know you shouldn't run unshielded cat5 real close along power because of inductive interference, but coax is shielded so I figure it shouldn't really hurt it correct? If there's a building code thing regarding it, what's PA's wiring code? All low voltage cables should be kept the same minimum distance from power. Sure, the coax is shielded, but any induced voltage from power can still travel along the shield until it finds a place to disburse, whether it be at a grounded point or through a loose fitting into the r.f. path.
The only thing that the NEC says along those lines is that low voltage and high voltage cables are not to be in the same conduit.
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CIAO! |
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brianl703
join:2004-02-26
Manassas, VA
| reply to cypherstream
quote:
I know you shouldn't run unshielded cat5 real close along power because of inductive interference
I've seen AC voltage (in the 10-16 volt range) run in the same cable as telephone lines in "quad" non-twisted pair cable and there was no "hum" pickup by the telephone line. (In fact, this was typically done in the 60s and 70s to power the dial light on the "Princess" phone. They installed a transformer somewhere in the house and connected it to the black/yellow wires).
And before anyone says that the 60Hz is below the frequency response of the phone...bzzt (no pun intended), wrong.
The old Western Electric/ITT/Stromberg Carlson phones are sensitive enough that if you touch one of the wires in the cord and ground the other one, you'll hear a soft buzz in the earpiece just from what your body is inductively picking up! (Same reason that you get a loud buzz out of your computer speakers when you touch the input plug).
From this I can only conclude that Cat5e is not as sensitive to 60Hz pickup from power cables as one might otherwise think, as it's interference rejection is much better than "quad" cable.
As far as coax goes, all the coax cables in the houses where I live enter the house through the same hole the main electric service does. I think this is pretty common actually. |
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