When I replaced my mast during upgrade to 200amp service, I inadvertently reversed the two feed lines. When our hydro company came out to restore service, they pointed it out and told me my meter would run backwards. Since I needed to have the inspector come back, and it was too late in the day, they plugged my meter in upside down overnight, before returning in the morning to shut off the service, allowing me to make the change, have it reinspected, and power restored.
I told hydro, I wasn't concerned with the meter running backwards
