On Saturday, July 1, 2017 at 7:09:00 AM UTC-4, Sherlock.Homes wrote:
Seems to be 120vac from red to ground and 120vac from black to ground but no
voltage between red and black, which should be 240vac. Reading was taken at
the external dissconnect. What might cause this?

Thanks,
S

Is the disconnect open or closed?