On Wed, 27 May 2009 08:25:22 -0600, "SteveB"
wrote:

A knife switch is just a straight piece of copper that looks like a knife.
On one end it is bolted to two strips of copper so it rotates. On the other
it fits BETWEEN two strips of copper. It is usually bolted on a board or
base. You've probably seen them in electrical panels. Not real common, yet
still used.

The cabin at the lake has fuses and knife switches.

Casady