I worked for Delta which was an Otis subsidiary company. We had Otis's safety policy. I did think SOME of the ideas worked well in most cases.I also found some of their policies could leave new mechanics with a false sense of security especially when servicing older equipment.
Personally I never use jumpers for troubleshooting. I am a field adjuster with 30 yrs in the trade. I may use a couple jumpers during a full load test, mostly for things like ETS and terminal slowdown tests but that is it. I find the use of a meter has always negated the need for jumpers. If I need to run a car out of the pit or overhead, I may use a wire for the 2 or three seconds needed AFTER I personally check the car. Obviously things like Otis safety jumper tags are needed on mod and new construction start-up procedures but once that car is in Automatic, jumpers should not be used. If you need to bypass a non-safety related circuit to allow the unit to run pending a part, then it should be hard wired with long bright wiring and properly tagged. An example of this might be where I needed to keep a motor generator running due to a faulty shutdown timer. If a mechanic gets a call of doors being knocked off the track, it is a SERVICE call and requires 2 men FOR A SAFETY FACTOR. Anytime the unit needs to be moved with the doors open, a second man with adequate communication should be at the affected landing. People being in a hurry or also being hurried by company management is what gets other people or themselves hurt.
