On 10/10/2012 02:16 PM, DoN. Nichols wrote:
On 2012-10-10, Jon Danniken wrote:

I have a triple-ganged variac stack that also uses a metal shaft. The
plate on each variac that holds the wiper is phenolic, providing
isolation from the voltage on the wiper.

Is that genuine Variac (General Radio) or a Superior Electric
Powerstat, or some other brand? It may be that some models have the
insulated shaft and others the insulated hubs within each brand.

Mine are GE Volt-Pac units, 240V/8.5A each. They look similar to the
ones on this page (you can see the insulated hubs):

http://www.iowa-industrial.com/Weste...ransformer.cfm

Jon