I have a site visit later today to assess an issue with an elevator not functioning when the elevator is running on generator power. The whole purpose of this one generator is to back-up one elevator. Apparently, the elevator runs fine on utility power but does not run AT all on generator power. My first thought is that there may be too high of a voltage drop due to the distance/under sized wires, my second thought is quality of power coming from the generator. In short, im just trying to see if there any ideas out there prior to making our site visit or if anyone is familar with this sort of problem. I don't know any other specifics as im going to be gathering any applicable information on my visit.