The POLES of a switch are the points at which current can enter the switch. The number of
THROWS is the number of possible circuits that can be connected to each pole. The number of BREAKS
is the number of points at which the switch breaks the circuit.
A ROTARY SWITCH is a multicontact switch with contacts arranged in a circular or semicircular
A WAFER SWITCH is a rotary switch in which the contacts are on wafers. The wafers are
mechanically connected by the shaft of the switch.