We are starting to get much larger grid tie systems above 100 kW and I still remember very clearly that Target melt down related to conduit that shorted out a bundle of string runs between the array and inverters due to improper allowance for expansion and contraction in the long above roof conduit runs. With this in mind I wanted to specify a conduit between multiple array rows back to the inverters and we get rain, snow, high temps, low temps that make me want to go with extra protection and cable support and have budget to do it right.
What type of metal conduit are you using on these larger roof array commercial systems - - - EMT, Intermediate, pipe, other?
Thanks,
Jeff Yago
Netscape. Just the Net You Need.
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