Arfa Daily wrote in message
...

"Eeyore" wrote in message
...


Arfa Daily wrote:

Explain why it's always the neutral terminal screw that comes loose in
a
plugtop, for instance.

Is it ? Is this a 'well known fact' or something ? Are you actually
serious ?

Graham


Deadly. I check the mains plug on every bit of kit that comes across my
bench, and in at least 50% of cases, one terminal screw will be loose, and
that is *almost* invariably the neutral one. There has been discussion
about
this in trade magazines, so amongst proper service engineers, it would
seem
to be well known.

Arfa



There's a simple explanation for that one.
The neutral retaining screw is connected to the prong that goes in and out
of socket each time and vibrated each time.
The live one is decoupled from a lot of that vibration by the fuse.

But why do christmas tree lights always fail to light when reused the next
year but were fine before packing away, at least one bulb is always loosened
over that 11 months. ?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/