UPS Sizing

[Craig White]

Trying to figure out UPS size for a G5 (not that it matters).

According to Apple's Specifications on a G5

Maximum current: 6.5A (low-voltage range) or 7.5A (high-voltage range)
for 100-125V AC, 3.5A for 200-240V AC

A Belkin F6C1200-UNV 
<http://catalog.belkin.com/IWCatProductPage.process?
Merchant_Id=&Section_Id=76&pcount=&Product_Id=199025>

1200 VA unit has stated capacity of 670 watts.

Now my simple math says 7.5A x 115V is 862.5W which would suggest that
this system is not sufficient for a G5

Is this correct?

I would need something at least 1500VA?

Craig