> >In most cases, I've seen MOV's just line to line
> >
> >But in doing some research, I've also seen in mentioned that for full
> >protection, you want to place a MOV from hot to neutral/return (line to
> >line), hot to chassis gnd and return/neutral to chassis gnd
> >
> >Any comments?
>
> I don't think this would be permitted by UL or CSA. It's unsafe.
>
> Best regards,
>
> Spehro Pefhany

AFAIK it is permitted, provided the appropriate standards are met.
Most compliant products nowadays appear to include additional
protection devices to avoid danger in case of MOV failure.

Brian Aase

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