Kinda along the lines of my last post, can RG-6 be cut with wire cutters live? I would think not given that even 3 volts (an assumption, maybe much higher) across a few mOhms would create a high current condition; however, I realize that at high frequency, the cable impedance can appear a lot higher (75 ohms to be exact), which does beg the question, can a guy get away with dead shorting a 100' (or much longer really) cable?
Unless the cable is carrying power for something like a downstream line powered amplifier or an LNB on a sat dish there should be nothing but micro volts of RF.
Even if carrying power the power supply is almost always short circuit protected. If you suspect line powering though be nice and disconnect it before you cut, but you probably won't cause a problem if you don't. There is certainly no problem with unpowered cable.
The only case that I could think of that could cause a problem is with the cable supplying an on premises extender amplifier that is line powered by the outside CATV plant. 60 volts AC and there are fuses out there someplace. This usually isn't done very often though.
Yes, it depends very much on what is being fed down the cable.
If it's plain RF signals, then it depends upon the power level. I wouldn't want to cut coax live out of a transmitter as it may well damage the final amp stage.
As for cables with superimposed DC power, I know somebody who got so fed up with a cable-TV company that kept billing and wouldn't disconnect the service that he decided to disconnect it himself. It took out the CATV power to whole block!
Re: Can RG-6 be cut with wire cutters "live"?#43595 10/18/0410:44 AM10/18/0410:44 AM
LK, good point I should have qualified my statement with low power line level signals. I am in the Telco buisness, and we mostly deal with DS3, some micro and a lot of wireless telephone. Yes if you were to cut a coax with a transmitter on it you could get burned.
Re: Can RG-6 be cut with wire cutters "live"?#43600 10/18/0408:34 PM10/18/0408:34 PM