I ADDED a 0.1uF capacitor across the MOV,
and from the nuertal to th eground leg.
The capacitor provides the noise supression.

In the car I have an OVP and reverse voltage
spike clamp.
Terry

The MOV was a convinient adaptor.
I ADDED a 0.1uF capacitor ACROSS the MOV
and from nuetral to ground.
I thought about cutting the MOV out, and tossing it,
but what the heck, with as many as I added(20) it has
to help a little.
Terry