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no date -  flashover and splintering of a 15-foot distribution-line wood pole

LIGHTNING DISCHARGE

E&MP 72.006

Artificial Lightning

no date

[The picture] shows the flashover and splintering of a 15-foot distribution-line wood pole. The flashover distance is about 10 feet. The voltage initiating the discharge rises at the rate of 3000 to 4000 kv per microsecond, reaching a crest of 2.5 million volts. A current of 23,000 amperes and of 50-microsecond duration follows the discharge.

[the following text refers to another picture not shown here]
Other tests on poles are given in Table I. A 12-foot pole split by the second lightning-stroke discharge of the generator. The first discharge produced diffusive splintering.

SH 3160

Original Caption by Science Service
Westinghouse



National Museum of American History

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