Paul wrote:
williamwright wrote:
On 14/11/2020 22:23, Roger Hayter wrote:


The only thing I can think of is an inductive load causing the
contacts to arc
and fuse. The monitors aren't ancient very large CRT ones I suppose?


No, new Samsung ones.

I mean, the weird thing is that some of the faulty switches have come
alright once they're removed from the panel. But I have to throw them
away, obviously. I have one in my hands now. It doesn't seem to be
caused by stress on the 1/4" connectors.

Bill

Inrush on a PC supply is 40A to 80A for a couple of 50Hz cycles.

OK, what kind of switch likes that.

Yes, I don't think it's even for as long as "couple of 50Hz cycles", I
think it's simply the mains rated capacitor that is fequently
connected directly across the incoming supply.

When I plug my laptop's power supply in there is often a noticeable
'crack' and there are lots of burn marks on the plug as a consequence.
I assume the randomness of it happening is simply down to what part of
the mains cycle it gets plugged in.

--
Chris Green
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