Wrenches its not the tool its the user so when I hear about impacts got to know the feel. Jerry
On Fri, Sep 3, 2021 at 12:06 AM Corey Shalanski <coreso...@gmail.com> wrote: > Wrenches, > > (This question actually does refer to the proper use of 'wrenches'...) > > While inspecting some recent work from one of our contractors, we noted > that the PV module clamps had been torqued to ~150% of the racking > manufacturer's specified value. My question is whether that might have any > detrimental effect on the modules (frame, glass, cells, seal, etc) and > whether it would be worth loosening the clamps and re-torquing them to the > proper spec? For reference, 224 modules are installed. > > We were made aware that the contractor used an impact driver on the > clamps, which accounts for the excessive torque applied. I definitely > understand the temptation to use an impact driver for just about > any hardware that needs turning—but my understanding is also that impact > drivers are generally incompatible with machine screws. So my other > question to the group is whether anyone has had success in dissuading > subcontractors from using impact drivers so liberally on project sites? Any > advice is appreciated. > > -- > Corey Shalanski > Jah Light Solar > Portland, Jamaica > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
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