Circuit Overload!

[x4550]

There needs to be a better explanation as to what is causing circuit overloads, and how to avoid them.  My power production far exceeds use, and none of my regular wire has more than 1000w drain on it.  So what am I missing?  Do I need a transformer every time I bridge off heavi-watt?  That seems excessive, given the gi-normous size of the transformer.  What exactly does the transformer do?  It's not really explained in-game.

The only thing that works is splitting up my grid, but why can't I have one humongous power grid if I want to?  If heavi-watt can carry up to 20kw, why, does it seem, can no power grid come close to using that much power?

[Kasuha]

3 hours ago, Stinktooth said:

Do I need a transformer every time I bridge off heavi-watt?

Yes, you do. ONI does not calculate load for each piece of wire separately, every piece of wire connected together is under sum of load from everything that's on that wire. 

[x4550]

13 hours ago, Kasuha said:

every piece of wire connected together is under sum of load from everything that's on that wire. 

I really wish this was mentioned in-game.