High and Low Voltage run together


Old 01-07-05, 11:10 AM
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High and Low Voltage run together

Can regular house circuits, catv, and tel wire run in the same space?
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Old 01-08-05, 12:17 PM
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Depends on exactly what you mean by "space". Yes if you mean a stud cavity. No if you mean a junction box.

Even if allowed by code, it's usually a bad idea to have line voltage close to low voltage for interference reasons. Somewhere between one and two feet of separation is good. And it's usually not a problem if they cross at right angles or are together for only a very short distance (an inch or two). It depends on what kinds of signals are running on the low-voltage wire and how well shielded the low-voltage wire is.
Old 01-08-05, 01:59 PM
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Also, you can't run low voltage and high voltage circuits in the same raceway, such as power (120/240) and thermostat (24V). Along with what John said, code says that all the conductors in a raceway shall be insulated to the highest voltage present.
Don't quote me on that; it is just something from memory. I think I'm right, though

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