PV Array Flex Conduit

James

Hi folks, it's been a while since I've
visited the forum. I'm looking for the formula for figuring out the rating for flex conduit on a PV array.

I have used 60 degree (wet) PVC Non-Metallic flex conduit before, but don't know if this is still ok according to the new NEC code. I will be runnig 4 KC130 panels in series (48vdc) to the combiner and would like to use the liquid tite flex conduit since the panels have junction boxes and not MC cables.
will this fly per code?
Thanks