I assure you that an open service neutral is always a big problem for someone. It may be the premises that is being served or one of the adjacent properties but it will cause problems, it is the nature of the beast.

At the very least, the water piping system is not designed to carry the neutral current. After looking at the 800-ampere GEC for one service, the metallic water piping to the service on the next property that has a 100-ampere service and its GEC. I wonder about the voltage drop and ampacity of the circuit. [Linked Image]

Charlie Eldridge, Indianapolis Utility Power Guy