i am changing a 220v outlet for a range, 3-wire , wiring already in place, everywhere i look it says one red , one white, one black, i have 2-blacks & a white, my question is, i know where the white goes of course, does it matter which black goes to which side? I dont think so i just want to make sure, they both should be hot, so it shouldn't matter right! I work with 110v all the time, never with 220v. If some one knows i would appreciate it!! Thanks!