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<p class="MsoNormal">Thanks Everyone for your feedback.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I will try and respond to all here.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The skid is a stand-alone power supply for GPS equipment that will be deployed to large scale solar installation sites.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It will not be subject to UL or NEC requirements, all though I do try to keep them well in mind.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It will be a welded steel frame that will be dropped on the ground at a propitious location on a job site and left in operation for 3 to 18 months at a time.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The power supply is a AGM battery/PV system driving 12VDC and 24VDC busses for various radio equipment.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">There will be two 8’ copper clad rods installed near the skid, about 6 feet apart to establish a system and a lightning grounding electrode.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The unit will have a UHF antenna lofted to 20 feet and the coax cable will lead to a lightning protection device with will in turn be connected to the lightning GE with a GEC.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The steel frame will have a stud for attaching a GEC that will run to the system GE.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The negative of the battery bank will attached to its own stud on the frame. An equipment grounding conductor will also run to this stub. This EGC and the Battery “-“ run back to a control panel that houses the power electronics including
MorningStar Genstar DC System Controller.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My quandary is how to fabricate the two studs on the frame in a way that I can have durable connections to the GECs.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I like welding SS bolts to the mild steel frame and using SS hardware.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have had one welding shop tell me that this is no big deal as long as you use a TIG and a 309L rod.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I can also just have a mild steel bolt welded to the frame, wire brush the stud before applying No-Ox, and tightening on a cable lug or compression lug with SS hardware.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">That is the tempest which resides in in my tea cup.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Mark<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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