DC String Combiner Box Commissioning Clause Samples

DC String Combiner Box Commissioning. All the DC Combiner Boxes are inspected and tested to verify the following: a) Correct number of Modules are wired in each string b) Verification of proper string polarity c) Confirmation that all Modules are functioning properly to the module manufacturer’s specifications d) Confirmation that there are no ground-faults present e) verify that all string fuses are properly sized and fuse holders operate properly f) verify that disconnect switch operates properly g) verify that equipment ground is properly installed h) verify that all conduit is properly installed and sealed i) verify that conduit sleeves have been properly employed in locations where there is ground motion potential j) verify that weep-hole has been installed and meets the enclosure NEMA rating k) Verification that all string feeder cables have been installed to the requirements of the design drawings and all cable testing has been completed. l) Verify that door seal is intact and that door operation is correct, with no bowing or off-center closure, all locking mechanisms are in place, and no surface damage is evident that has not been repaired according to manufacturer’s specifications, No enclosure integrity is compromised. m) verify that UL label (where required) is present and that the equipment voltage class meets the operating voltage class n) for all cables verify that the cable installed meets the voltage class of operation and that the cable meets the conditions where installed including UV exposure, UG/TC installation etc. Exhibit H Testing and Commissioning