First: Really great mod. Installed it directly after release together with buildcraft 2.2.0 and had loads of fun (450+ solar panels ftw!)
So, today I wanted to automate my use of the mass fabricator a bit more and added some buildcraft pipes to it, which worked well.
The problem is, the mass fabricator is connected via a MV transformer to my MSFU using a gold pipe (128 EU/t max) and draws ~460 EU/t!
MSFU -- (HV cable) --> MV Transformer (no redstone power, of course) -- (gold cable, 4x as much power as it should be able to transport) --> Mass Fabricator
Screenshot: