James Burch wrote:
Indecent Arc Flashing has been around since the 70s. Derived from “Arc”hie Bunkers’ days of a blooper, well publicised but never aired, between Meathead and Archie.
It must be noted that special labeling for equipment subject to indecent flash is required. Labels must be located between 36 and 42 inches above the floor, at least 6 inches square, 7 for usually high energy situations. Both front and back sides of the equipment must be labeled especially if the equipment is over 50 years old. Safety distances vary, depending upon the age of the technician, See OOPSHAs’ website.
The safety distance will depend on the so called 'arc length' of the indecent flasher and the visual acuity of the person looking at it. For example, a typical arc length and 20-20 vision requires a distance of approximately 25 meters to reduce mental scarring to an acceptable level.