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Roof Attachment Bonding <br /> The QRail is attached to the roof by roof attachments with L-feet. �IUllfl� <br /> Hy1r <br /> The connection from the attachment device to the rail is made via a stainless steel T-bolt and <br /> a stainless steel, serrated flange nut (Image 2.4.11-2). <br /> Image 2.4.11-2 <br /> T-bolt <br /> Full engagement of T-bolt is confirmed when the alignment <br /> indicator line on the end of the T-bolt is vertical. <br /> INCORRECT CORRECTniNn <br /> WARNING Image 2.4.12 <br /> T-bolt in QRail <br /> Module Level Power Electronic (MLPE) or Accessory Bonding <br /> The QRail is attached to a MLPE with the same stainless steel T-Bolt and stainless steel <br /> serrated flange nut used for the roof attachment. (Image 2.4.11-2). When secured to the rail <br /> [16 ft-lbf (22 N-m)]', the T-bolt crushes and pierces the aluminum oxide or paint and forms Image 2.4.13 <br /> an electrical bond with the rail. The serrated flange nut pierces the coating on the MLPE T-bolt in QRail with MLPE <br /> bracket and forms an electrical bond that is carried through the T-Bolt to the rail. installed <br /> Use only 20mm long T-bolts when <br /> ' mounting Module Level Power <br /> • Electronics (MLPE) to top of rail. <br /> 25mm long T-bolts increase the risk <br /> CAUTION of contact with the back sheet. <br /> 1 If using non-nylon patched t-bolts tighten to 15 ft-lbf(22 N-m) <br /> 1317.2.3-46 11 J u 1-2019, Rev 4.2 <br />