"AlexW" wrote in message
...
Bob Mannix wrote:
"AlexW" wrote in message
...

Bob Mannix wrote:

"AlexW" wrote in message
...


Bob Eager wrote:


On Wed, 5 Oct 2005 08:53:23 UTC, "blackboab"
wrote:




AC current changes direction 50 times a second


No, it doesn't.


I thought it did actually as Electrons flow from -ve to +ve IIRC, or
the current flows from +ve to -ve in conventional notation.

The live is always energised though with either a +ve or -ve potential
wrt the neutral.


You fell into his little trap! It changes direction 100 times per
second, having a burst in both directions 50 times a second.



Trap?

It still changes 50 times second though for the UK supply, the limits
would be a minimum of 99 to 101 times.


So that would be 100, not 50


AC current could actually change at any frequency.


Well so it could but it *could* also be a 330,000 V AC supply, in which
case

Yes, it could.

You snipped the context of the (rest of) the question though and the
response did not really clarify things for the OP.

I responded to the OP question in another posting which was crystal clear.
In this posting I was responding to your assertion that "it did actually"
change direction 50 times per second (which it doesn't)


I wouldn't touch the neutral!

Why not assuming its at the same/similar potential as you?

Well I would make the assumption (for my own safety) that given a 240V
supply might generate stray neutral voltages of up to 30V, a 330kv one
*might* generate neutral voltages of up to 30kv. Of course it might not, as
such supplies would be three phase and arranged differently, but I wouldn't
take the chance myself!


--
Bob Mannix
(anti-spam is as easy as 1-2-3 - not)