Consider this… What do you suppose occurs if the Low voltage system becomes energized in some way from the (ANY higher) voltage system?
(Note: standard residential systems ARE NOT considered HIGH VOLTAGE although they are a HIGHER VOLTAGE!).
I recommend you go back through the course until you fully understand WHY it is not allowed.
Thanks Brian, yes service entrance conductors and other communications cables typically require 2’ of separation per the utility company rules. You are correct that the nec does not permit the communications wiring on a service mast.
Since this thread is about Class 2 wiring Class 2 cables can be run with power cables. For example a thermostat cable can be run through the same hole in a wood stud with NM cable.
Not sure if its even applicable anymore but back in the day alarm wires were not run in cables they were individual conductors usually twisted together. As far as interference from the alarm system and power system wiring running in proximity to each other I dont know that with 2022 technology if that’s even an issue anymore.
It was rigid pvc conduit where I had run NM cable across a garage to an electric garage heater. I ran the thermostat wires for the heater through the same sonduit with the NM. I guess I would consider it a sleeve, as both the NM and thermostat wire were cable assemblies, and not individual conductors, if that’s what you mean.
Yes that would be the same as running the cables through the same hole in a stud. The key word here is cables. Power and Class 2 cables can be run together. If you pulled individual conductors in then separation would be required.
I often hear electricians say that they pulled in 600 volt wire in the raceway for both the power and the stat. That is not permitted because class 2 individual conductors have separation restrictions.
There may be differences in other countries, but the standard American voltage for POTS phone service has always been -48 DC while the phone is ringing; and between -3 and -12 volts while the phone is off the hook. (Positive ground).