LaCrosse Industrial and Safety Boots    --   ASTM

The ASTM F 1117 label signifies that this footwear is designed to pass the testing requirements of the "Standard Specification for Dielectric Overshoe Footwear".  The test method in summary:

1. The overshoe is filled with water, and immersed in a tank of water.

2. The water inside and outside the overshoe is electrically charged, both bodies of water becoming electrodes.

3.  The height of the water inside and outside the boot is determined by the voltage used for the test - the higher the voltage, the more gap is allowed between the two water levels. For 15 KV, this "flashover clearance" is 5 inches (127mm), or 2.5 inches from the top of the boot, for both the inside and outside water levels.

4. Voltage is smoothly applied to 75% of the required test voltage, then applied at a rate of increase of 1 KV/sec until the required test voltage is reached.

5. The required test voltage is held for not less than 1 minute, and not more than 3 minutes.