Beltfed,
I did a little research and found Wiring Products dot something. Their description of the fan relays indicate two current ratings, the higher one is used if the relay is wired for NO service and the lower value is used when the relay is wired in a NC configuration.
With current flowing in the NC arrangement, upon opening, you would get the 'arc flash from heck', hence the lower rating.
It's as clear as mud to me.
http://www.wiringproducts.com/index...tml&gclid=CNunuoHC-5gCFRxNagodVX7DnAStuart
