Wrenches, I am installing Lumeta peel and stick modules (similar to laminates) on a flat EPDM roof. No racking. NEC2008 690.31(B) says single conductor cable listed and labeled as PV wire shall be permitted in exposed outdoor locations..."within the array". 690.2 defines array as a mechanically integrated assembly of modules or panels within a support structure...to form a direct-current power producing unit. With the Lumeta's there is no support structure. If you look at the diagram in the NEC 2008 (page 70-576) it shows a box around the modules or panels and labels that box as the "Array or photovoltaic power source".
My AHJ was at first not sure but then told me I had to install all the PV wire in a listed raceway because the interconnects between the Lumeta's were not within the array. But if you draw a box around all the Lumeta's it would look like the array diagram that I referred to above. Because of my roof layout, it would be much easier to install an unlisted wire management system within the array rather than conduit which I will do but in reading the NEC it just wasn't clear to me what "within the array" means. Any thoughts would be appreciated. Thank you. Larry Liesner Design and Installations Elektron Solar, LLC 16 Ketchum St. Westport, CT 06880 203-557-3127 (office) 203-644-2404 (cell) 203-549-0977 (fax) [email protected] NABCEP Certified PV Installer (# 032611-184)
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