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by sokoloff
1225 days ago
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I believe that a grey non-metallic conduit piece would meet the definition of a raceway in article 100 (to which the insulation rating rules would apply). A white PVC pipe is not “expressly designed” for that use (and would therefore clearly not be a raceway). Article 100 defines a raceway as “An enclosed channel designed expressly for holding wires, cables, or bus bars, with additional functions as permitted in this Code” |
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I.e. you can have in same conduit a "protected" (double insulation) mains cable (the type is called FG16 now, it was FG7) and a low voltage/signal cable.
The idea is that the FG cable in itself, having the external insulation besides the single wire insulation and being suitable to "unprotected" installation can coexist with signal cables, the conduit in this case is only an added mechanical protection.
The type of certified 400 V insulated cables I mentioned earlier is instead allowed to coexist with "normal" single wires (this is the normal way electricity is distributed in buildings) inside a conduit.
The issue using FG cables (besides the fact that it is way harder to be inserted in small conduits) might be that it would be suitable to power (say) a mains receptacle (live+neutral+earth) but wouldn't be suitable for (still say) a diverter or a reverse switch due to the colour coding of the wires.