A steady and similar voltage breakdown of 1653kV was
applied to every pair of air terminal being tested under the
ambient temperature of 25.40
C and pressure of 1006 mb. After
10 sets of data, the position of the air terminal was
interchanged (Rod A at position B and Rod B at position A)
and another 10 sets of data were recorded. The number of
strikes per air terminal over a total of 20 sets of data were
recorded