Did you mean for this post to go here? It doesn't seem to fit.Before telling customer to call POCO I would at least place temporary unbalanced load to see how neutral voltage responds. If not good response more fuel for your theory that they might have a problem. But here I usually will be one calling POCO and will likely be there when they show up to check out the problem, but here we typically know the POCO guys personally anyway, and even have personal mobile phone numbers for at least some of the supervisors and can bypass the main office clerk that will only pass a message on. Can't have that in many cases in large cities.