• Content count

  • Joined

  • Last visited

Community Reputation

0 Neutral

About sellis

Contact Methods

  • ICQ
  1. Thank you for the information. From what I understood from your response, it is not good practice to combine in the same conduit communication cables with power wiring. That is information that I have heard with regards to standard 120V and higher voltage AC, but did not know if the 70V DC PA wiring was considered a high enough voltage or current to be a problem (for example power over Ethernet uses a higher voltage and current but is typically not considered a problem and is run within the same cable). I believe that separating the PA wires from comm wires is good advice, but unfortunately good advice is not always good enough for some people. The client I am working for does not want to pay to have separate conduits unless required by an applicable code or standard. The ANSI/TIA/EIA-569-A standard states: "Co-installation of telecommunications cable and power cable is governed by applicable electrical code for safety." The applicable electrical code for safety in this case is the NEC and whether or not the PA cable is considered a power cable in the NEC seems to be based on what class of power source the circuit is powered by. This brings me to my original question: When outputting at 70V, is the CTs-1200 amp considered a class 1, class 2, or class 3 power source? In the CTs 2-Channel power amplifier user's guide it says that CTs amps require Class 2 wiring and on the photo of the amp in the guide it says "Class 2 wiring outputs" above the screw terminals (page 14). I just want to verify that it is still rated as Class 2 even when outputting at 70 volts. Is this correct? Thank you for your help.
  2. I have been trying to find out if I can combine in the same conduit my 70V PA speaker wiring from a CTs 1200 amp with other low voltage communication wires (such as Cat. 6 Ethernet cables). I have looked through the NEC and it looks like the requirement is based on what class of power supply the voltage source is rated as. It appears that for power supplies (which I am assuming would be the amp in this case) that are rated as Class 2 or 3, the associated circuits can be combined in the same conduit with communication circuits. If the power supply is rated as Class-1, then the circuit cannot be combined in the same conduit with communication circuits. Has anyone looked into this before that can tell me if I am reading the code right? Also does anyone know what class the CTs-1200 amp is rated at when outputting at 70V? Aside from the NEC requirements, are there general guidelines on this topic to avoid crosstalk or other problems? Thank you.