Type A (1903 to 1904)	Back	Up	Next
This meter was identical to the Round Type except for two major changes: The terminal chamber was moved from the rear to a more accessible position at the top of the meter. Also, a new ball-type bearing was introduced on this model instead of the pivot type bearing used in the Shallenberger and Round Type meters. A three-wire version of the Type A was also made, and this version is the only AC meter that is physically different from its two-wire version.

Westinghouse Handbook on Watthour Meters

Photo by Dale Sindelar