"max" wrote in message
...
If any one uses plastic pipe for their dust collector you have to make
sure
to ground it or it can explode. Plastic is an insulator and the friction
of
the dust moving through it can cause a static buildup and then an
explosion.

That's an urban legend that's officially classified as rec.woodworking tired
topic #33.

Nobody's ever had an explosion in a home dust collection system due to
static electricity.

Bob