3 phase confuses me. I have a 15kw 3 phase electric furnace that I want to hook-up. The rating says its a 208volt, 41.7 amps current pull. I need to buy a breaker for this and don't know what size to buy. My question; is the 41.7 amps the total amps this unit will draw across the three legs? In other words, do I buy a 20amp three phase breaker, 20 amps for each leg? or Do I buy a 60 amp three phase beaker, cause each leg will be drawing the 41.7 amps? I hope this isn't to confusing for those that read this.