power usage of an S822 power 8 server

Hi,

How much power will an S822 power 8 actually use? Much more than a power 7
8202-E4B? The S822 would be running the same workload as the power7. Which
is IBM i running on a single core.

I am asking because the S822 needs 240V utility power and the electrician
wants to know the amperage.

The amperage can be calculated by dividing the 1400W power supply by 240V?
Then x2 because there are two power supplies? Or is the 2nd power
supply for redundancy and the max amps the S822 will draw will be the power
supply rating divided by utility power voltage?

What is confusing me is an actual S822 user, a linux developer, says the
system generated a lot of heat and spiked the electric bill. He said 16
amps. I assume that was on a 110V circuit going through a transformer to
step up the voltage. But even 8 amps at 220 or 240V is 1600W. Which is
much more than the power 7 I had been using.

thanks,

-Steve