Tabby wrote:
On Mar 8, 9:09 am, MM wrote:
I believe someone was recently talking about voltage spikes, though I
can't find the thread in Google Groups to hang this on. I happened to
be watching my consumption thingy this morning and noticed that it
was constant at 249 volts. Then it went up to 250 for 30 seconds,
back down to 249, then back up to 250 again. For a good five minutes
it hovered around 249-250. Then it came down to 248, then 247.

Aren't these spikes damaging to sensitive equipment? (TVs, DVD
Players etc) I don't worry about the PC because I have a UPS on it.
The voltage is ~supposed~ to be 240 in the UK.

MM

A voltage spike is 100s of volts big, and lasts for milliseconds.

240v is the target voltage, real voltage can be 10s of volts away from
this. 1v variation isn't an issue.


I'll second that and just add that unless all the supply cables are
superconductors then the voltage will vary according to the load in both MMs
house and neighbouring houses.

MM - It is not unusual for the voltage to drop by as much as 8 volts in a
house when an electric shower is switched on depending upon the external
resistance of the supply to the house.


--
Adam