In article ,
Grant Erwin wrote:

I physically looked at the connections too. Unless the external terminals
don't match the wiring on the nameplate, the wall voltage (117VAC) is
connected across the input side. One side is directly connected (that's
the hot lead) and the other side (the white lead) is connected through a
fuse to the other input terminal. That terminal is also connected to the
output, as is the slider.

This part sounds wrong - the hot lead should be the fused lead, and the
neutral should be both not fused, and connected directly to the load.
Either way the described setup is connected is half-wrong, IME.

ie - hooked up as described, the fuse is in the wrong place, but the
connection to the load is right.

--
Cats, coffee, chocolate...vices to live by