Quote:
Originally Posted by 30 Closed Cab PU
Here is a Wikipedia link.. It was heavily used in cooling concoctions used in oil filled transformers, coils, and other uses. Was found to be nasty stuff and the U.S. EPA (Environmental Protection Agency) clamped down on its use.
https://en.wikipedia.org/wiki/Polychlorinated_biphenyl |
Some were even filled with an asphalt type insulation material which also helped seal the windings.