"Eeyore" wrote in message
...


Chris wrote:

I've got a ~2 year old microwave that has shown no previous signs of
trouble and is to all appearances in good working order. During
normal operation (melting butter on low power)

That isn't a suitable load for a microwave is it ? You need some water in
there.

No surprise it arced.



Even an empty microwave should never arc to the outside, I've never, ever
seen that before, and I too have used microwaves to melt butter hundreds of
times over the decades.