Most relays like a lot of electrical things are rated for a peak rating and not a contunious rating. In this case of your relay it was rated for a peak load of 30 amps, so for example the surge of amp load that occurs when you turn on both fans would likely exceed 30 amps when the fans are first turned on. The contunious load of the fans is supposed to be 25 amps but things like the size of the wire used, the distance the current has to travel etc will affect the total amp load. Ideally most relays are designed to work at 70 percent of their rated capacity on a contunious basis. Also check when you go shopping for a relay, be aware that there are two kinds, the contunious duty and the intermintent ones which act like a heavy duty switch. Getting the right ones the first time will save you some social embarrasment....Thanks Randy.
