Carl, I also have a job on a brand new SS metal roof and I just did not want put any holes in it so I am going down the side of the building and not penetrating at all. But it's only 50kW. Do you have the option of no penetration? I am curious though as to what j-box/sealing/flashing set up you were planning on using.
Larry Liesner Wirewiz Westport, CT Phone: 203-644-2404 Fax: 203-557-0556 [email protected] www.wire-wiz.com On Feb 14, 2011, at 2:56 PM, Carl Adams wrote: > I have a project for 250kW system. 4/12 pitch standing seem roof in > the Great Lakes snow country. My initial proposal was to get the > source strings through the roof and inside to serviceable combiner > locations. This was shot down by the architect who did not want 5 > holes punched in his new roof. So we then shift to pass thru Jboxes > where we transition the PV wire to THWN-2 and into RMC back to the > desired point of entry. The electrical sub on the project has now > proposed to reduce expense by replacing the RMC with cable trays and > running USE-2 in the cable tray from the JBOX back to the point of > entry. > > I'd appreciate your thoughts on the use of the cable tray and USE-2 on > the roof top. > > WIth REgards > Carl Adams > NABCEP cert 031508-1 > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
