How much current does cooling fan draw?

I need to buy a relay and wiring to get the a/c fan working via a dash switch - can anyone tell me how much current the fan draws please?
 
Thanks
James

According to Rods manual 5.3-6.5 amps 

Thanks, I’ve got 8 amp cable and a 30 amp relay, so that should do just fine.

Cheers
James