I've seen a technique used to mark properly torque fasteners, which is to torque the fastener and then use a sharpie to draw a line from the center of the fastener off to one side of the surrounding material.
I've heard that a clueful inspector will understand this, and recognize it as meaning that the electrician actually took the time to properly torque the fastener. Of course it doesn't actually say what torque values was used, and nothing prevents someone from simply marking any random fastener.
I like the approach of recording the torque value that dmattox suggests. This permits an inspector to double check which torque value was actually used, and is a pretty nifty workmanship detail.
As an inspector all I can say is you don't know. I do check that they at least have a torque wrench on the job. If they use it, and if they use it properly, it is the installers responsibility not the inspectors. If it fails it goes against the installer not the inspector. There are torque requirements for screws. Have you ever seen an electrician use a torqueing screwdriver when installing a receptacle ? As an inspector you have to trust the licensed electricians.
[This message has been edited by Alan Nadon (edited 06-19-2005).]
I don't understand the concern over re-torquing a fastener. If you have tightened it to, as, 14 lb-in, wouldn't applying 14 lb-in to it again have no affect? It's not like a hammer blow, after all.
If you torque something down, then immediately try torquing it again you will move the lug/bolt more than when you first torqued it, often substantially if the torqued rating is low. Worst case is that you might strip out a lug, nothing worse than trying to loosen a stripped lug.
IMO most all of us, when tightening lugs free hand go far above the specified torque. Try using a torque wrench and I think you will be surprised how quick you here it click.
I'd agree with that. I was torquing down some bussing with a helper a couple weeks ago. He was working with one of our other foremen saying they were using a wrench with a breaker bar. He was shocked with how little pressure was actually needed when you torqued it to manufacture's specs.