"AJB" wrote in message
...
Tweaking some lighting, I turned off the mcb for the LX circuit and
opened a pendant fitting. Double-checked with a neon 'driver - not
live,
is says. Unscrewed one of the neutrals. As I do so it sparks quite
impressively. Why?
snip

You're a frecking good example why we now have Part Pi(iss)...