Besides, she complained of her meter spinning much faster than the neighbour's. Well, her meter was a 480 revolutions per kWh type and the neighbour's was a 75 rev/kWh...
Good catch, Texas! In my experience, not too many sparkies know enough about kWh meters. I myself didn't know until I started educating myself on the topic a couple of years back.
Do the nameplates of your meters actually read "revolutions per kWh"? Ours bear the rather cryptic abbreviation "Kh" (watthours per revolution). So, your typical modern 240V single-phase residential meter is a 7.2 Kh (7.2 Wh per revolution, or 138.9 revolutions per kWh), but there are older ones out there that are 12, or 3.6. Old 120V meters (extremely rare by now) are typically 1.8 Kh. 3-phase meters can be a higher Kh (20+), and new digital ones are usually 1.
