Dual electric fans, FIRE!

I have two Jegs manufact fans. 12.5 amps apeice so I got two 30 amp relays.

I am trying to hook one fan up at the moment.

So, I ran a 12v constant line to the relay
grounded the relay. the ran another 12v source to the toggle back to the relay.

I have a inline fuse from the 12 to the relay.

I switch on and everything is fine for a min then the toggle smokes and the positive line from the switch melts all the way up

I like the idea of 12v straight to fan and the negitive to a toggle that seems sooo simple, do others advise this? If I get 5 yes's then I may go that way.