I'm not an electrician but have installed around 10 million feet of low voltage wire under one in a previous job.
Plenum cabling is typically only required when the cabling is in a space open to the air (e.g., a t-bar grid ceiling with HVAC cold air returns in it). If sealed behind sheetrock or something else you can use the standard stuff, which is less expensive.
Also, almost as important as the proper ordering of the individual strands is preserving as much as the twisting as possible. Hard kinks in the wire and stripping too much at the termination ends can affect that.
Running too near other wiring can severely affect the noise as well. If you need to cross it, perpendicular is the best.
And lastly, be aware of the maximum rated length for the wiring when doing long runs. It can only reliably carry the signal so far.
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I'm not an electrician but have installed around 10 million feet of low voltage wire under one in a previous job.
Plenum cabling is typically only required when the cabling is in a space open to the air (e.g., a t-bar grid ceiling with HVAC cold air returns in it). If sealed behind sheetrock or something else you can use the standard stuff, which is less expensive.
Also, almost as important as the proper ordering of the individual strands is preserving as much as the twisting as possible. Hard kinks in the wire and stripping too much at the termination ends can affect that.
Running too near other wiring can severely affect the noise as well. If you need to cross it, perpendicular is the best.
And lastly, be aware of the maximum rated length for the wiring when doing long runs. It can only reliably carry the signal so far.
I'm not entirely sure you said what you meant. In wall installations of any cabling in the US requires CL2 grade.
Class 2 wiring isn't "plenum" wiring. See http://www.bluejeanscable.com/articles/inwallrating.htm and the NEC.
Ahh, my bad. I was under the impression it was.