WIRE BURNED IN POWER LINE TEST
April 24, 1942
The flash in this picture was bright enough to have been seen five miles and the accompanying roar was heard for half a mile away.
Yet the whole thing was caused by the deliberate burning of a wire.
It is a picture made some time ago at Leadville, Colorado, during the testing of a 150-mile power line of the Public Service Company of Colorado.
A General Electric six unit Hewlett Insulator string had been hooked into the circuit and the line conductor grounded by means of a piece of fuse wire.
When the switch was thrown and 110,000 volts went pulsing through the circuit, the fuse wire burst into flame and 1000 amperes jumped the gap with a roar.
Fifteen watchmen were stationed at 10-mile intervals to watch for similar outbreaks, the indication of weak spots, along the line.