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Installation Manual: MEMC Silvantis 60 cell PV Modules 9 of 15 <br />WARNING: It is not recommended to mix connectors from different suppliers within the same string. This includes <br />connections at the inverter, combiner boxes, and modules. <br />Always wire modules so that proper polarity is maintained. Avoid placing excessive tension on the cables: <br />There is no limit to the maximum number of series stringsthatcan be combined in parallel. However, when doing so, each <br />string must include overcurrent protection with a maximum rating of 15A. MEMC recommends fhe useof DC rated fuses or <br />overcurrent protection devices-with the appropriate maximum voltage rating. <br />Do notconnect modules directlytoa parallel bus. <br />The cross-sectional area of cable and the connectortype must be selected to align with the overall system design and should <br />include the maximum shortcircuit currentof the system, maximum operating temperatures, and cable run lengths. <br />Forfield connections, use ata minimum #12 AWG/4 mm21 wires insulated fora minimum of,85°C. Use copper wire only. <br />5.3 GROUNDING <br />The moduleframe includesiseveral labeled grounding holes. These holes maynot be used for any other purpose. <br />MEMC recommends a Burndy BGBL-4 AL lay-in lug for grounding. <br />Only Negative grounding circuits (negative polarity to ground).shall be used within the array design. <br />Attach the grounding lug to the frame as follows: _ <br />Step 1.: Use stainless,steel hardware. <br />Step 2: Place the grounding lug overthe grounding hole on the exteriorof the module frame. <br />Step 3: Place a star washerdirectly between the bottom of the grounding lugand the exteriorsurface of the frame. <br />Step 4: Placean M*or#8-32 boltthrough the lug, star washerand framegrounding hole. <br />Step 5: Securethe lug to;the frame using a flat washer, split washerand M4 or#8-32 nut. <br />Step 6: Torque the bolt stack to approximately 1.5 N.m (or 1.1 foot pounds) toensure the star washerscratchesthe <br />anodized frame. <br />© Copyright 2012 MEMC Electronic Material <br />4 <br />,