The service for the site was recently upgraded from 200 amps to 400 amps service. The sub-panels were re-run from the new panel. There are now a 200 amp panel, and two 100 amp panels.
I decided that I would like to know how much electricity is used on one of the 100 amp panels, so I put the old meter base in line ahead of that panel and purchased a used electric meter.
However, when I plugged it in, it runs backwards. I cannot tell why and could use some help.
Here is a picture of the meter base inside and out.