Photovoltaic wiring conduit type

[Npstewart]

What type of conduits is approved for photovoltaic systems installed on a roof? Is it required to be RMC?

 

[raider1]

Take a look at 690.31.

Chris

 

[Npstewart]

Thanks raider. I had someone call me about a photovoltaic system they are helping a EC with. The EC installed everything in schedule 40. Now apparently the conduits have shrunk out of the fittings leaving exposed wiring. Anyone have experience with this? I was looking at 690.31 (A) under the "FPN" . It talks about high temperatures for installation.

It doesen't surprise me as things tend to shrink when cooled and expand when heated.

Any input would be interesting.

 

[c_picard]

pvc's OK if listed for the temp,

If you engineer for record hot/cold + ambient adder
you need an expansion fitting after 5' i upstate NY,
extreme bu necesary.