This was my reply to Karl. I don't think it made it to the list for some reason. No, I was thinking of flexible non-metallic conduit. The one I think I used was Carflex by Carlon. http://www.carlon.com/Master%20Catalog/Carflex_Brochure.pdf I don't think it makes a lot of difference, though, as long as you get a product rated for outdoor use. -Steve