Paul Burridge wrote:

The power company run a line to my house. They supply me with
electricity. This amounts to a 230V, 65A facility at the distribution
board in a cupboard under the stairs.

!!!!!

I run all my stuff from that
board. The board contains several RCBOs that trip-out in the event of
any leakage current being sensed. If current in = current out; they're
happy and won't trip. Because they don't trip out, I conclude I don't
use any current.
The voltage supplied is 230VAC RMS.

!!!!!

Since this is alternating between
equal positive and negative half-cycles, the average level of this
voltage supply is zero.
I use no current and they effectively supply no voltage. Why do I get
billed for electricity usage when I clearly can't have used any?

I hope you should know the answer. It involves a square term.

Have you tried measuring the voltage.

No European countries run on 230V to the best of my knowledge.


Graham