Coax Cable Length

[PBX_Guy]

Yea boy is it a pain in da ass to work with. WHen I used it to give signal to a guest house I found out how much a pain it is to work with. But you can put maybe some RG6 in a conduit and have it water tight and it would be easier to work with

Be careful with coax in conduit - you'll change the impedance of the cable. Coax can go inside PVC no problem, but if metallic thinwall or rigid you'll want to be inside a minimum 1" pipe else you'll wind up with signal loss you can't explain.

 

[KKlare]

The physics of coax is such that metallic surfaces outside the braid have NO effect on the signal within including the impedance. (As my physicist self.)

Ground loops, pickup, and such are a different problem and they will tell you to tie the braid to a conduit at only one end to avoid them.

-Ken

 

[NightHawk]

Be careful with coax in conduit - you'll change the impedance of the cable.

Not sure where you got that idea but it aint so.

 

[PBX_Guy]

The physics of coax is such that metallic surfaces outside the braid have NO effect on the signal within including the impedance. (As my physicist self.)

Ground loops, pickup, and such are a different problem and they will tell you to tie the braid to a conduit at only one end to avoid them.

-Ken

Thanks Ken. I will defer to your expertise on this. Merely sharing what we observed with a TDR and RG6 (single shield) inside 1/2" EMT (but with no electrical connection to the coax. No doubt your suggetsion to connect the braid at one end to the conduit would have solved the problem. (never even thought of that, but it makes sense) The coax conduit was overhead alongside 480/3-phase in a welding dept and was put in conduit simply for physical protection rather than using .412 hardline. (old Allen Bradley Token Ring network)

 

[NightHawk]

Ground loops, pickup, and such are a different problem and they will tell you to tie the braid to a conduit at only one end to avoid them.

There are so many factors that go into determining if that's a good idea it shouldn't be viewed as a rule set in stone.