Been trying to figure out what to do about this at work recently. We have our welders inspected quarterly by an outside repair shop to find any problems with our welders before they bite us in the rear. They always write up the fact that nearly every one of our welders have electrical tape on the welding leads as a deficiency. This causes a problem because it would cost thousands to replace every lead every time they get a knick in them. I read the OSHA regulations that seem to say that a repair can be made to welding leads as long as the ten feet closest to the electrode holder is repair free, but I wonder if I'm interpreting this properly. We used to repair small knicks and cuts to the leads insulation by simply taping them but we have decided from now on to wrap these areas with a rubberized insulating tape and then seal it with shrinkwrap. This makes for a very effective fix in my opinion and I believe it will hold up to the abuse that we put them through better than just tape.
What do y'all think? Should we repair them at all? What's the best way to repair a knicked line?