N_Cook wrote:

Perhaps the voltage rating was lower than the required use, ie in fused
state not rated for the service voltage across the broken section so someone
thought, I know , we'll put 2 in series ;-)


Which would do nothing, if they couldnn't handle the voltage.

Have you ever looked at the wiring in a furnace? They use multple
thermal shutdowns, for liability in the US.


--
You can't have a sense of humor, if you have no sense.