Zeb,

That plug would scare the shit out of me!!
I have an electrical background and have a few recommendations.

You have to replace both the outlet and plug if you don't already know that. Then try to break up the load on two different circuits. I also recommend checking all conections on that circuit for any over heating, exspecially the circuit breaker. I would hate to see you burn your house down.

Great grow you have going there.