i have a 15 kw electric furnace, i want to install in my house. i temporarily used 2conducter 2 with a 100 amp breaker. i need to move the furnace to a different location in the basement to accomadate a/c and i want to run conduit to make it neater. the unit draws 60 amps even though the nameplate says 64. i don't have a current codebook but i was hoping to run 2 number 4s in a 1 inch conduit and still have to use the 100 amp breaker. help me out with this one please?

forgot to add im in ontario as that can make a big difference in rules.