thhn with cat 5

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Can your describe your exact situation more ?

Seperation is usually maintained in this case. Sorry, I'm not at a code book!

The rating of THHN is usually co-rated THHN / THHW, there's many here that would go with possilbly XHHN/XHHW, or even other and depending on the application. The "W" is for weather!

If for example the two different voltage start out in the same conduit the insulation valve has to have the same insulation value, if met the voltages would not be a concern.

Welcome to the forum! Enjoy...
 
cadpoint said:
If for example the two different voltage start out in the same conduit the insulation valve has to have the same insulation value, if met the voltages would not be a concern.
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Not the same, necessarily, but at least as high as that which the higher voltage present requires.
 
U need to read 300.3 (C), thanks everyone...

Frankly I'd read from the begining of 300 and farther but the thats MO .. :D
 
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It would depend on what the power source for the 24v on the THHN is. Is it CL2 or CL3? Then there isn't a problem any more than using 18/2 thermostat wire instead of the THHN. If it's Class 1 then you will have to maintain spacing.

I suspect though that the reason THHN is being used here is because of mechanical or environmental considerations. If it is powered from a CL3 or CL2 source the fact that it is THHN is irrelevant and it can be considered CL3 or CL2 wiring.

-Hal
 
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