what color is the hot wire on a 220 volt ?

Question

i work at a factory that has a test to get on mantance and i am not familar with factory wireings

Answer 1

All hot wires are any color except white or green. To say both are hot depends on the kind of system. You say 220V which might not be US, since that isn't a standard voltage. It is slang for the proper 240V term. 240V can either be single phase 240/120 or three phase 240V. If the 3 phase case is corner grounded, then it is possible for a white wire to be present for 240V.

The comment of another about black tape on a white wire: that can only be done with cables. When pulling wires through conduit, the proper colors need to be used (except the really large conductors).

Answer 2

hi Ed, In conventional a hundred and ten volt wiring, the black cord is warm and the white cord is impartial. The bare copper cord is a protection floor in basic terms and shouldn't carry cutting-edge in many instances. the undeniable fact that it grow to be arcing shows some severe fault. i'm unsure if any of the switching on the pump calls for a hundred and ten volts, yet while so then somebody would have jerry-rigged that to apply the protection floor as a impartial. no longer solid in any respect. if so, the white might carry one 0.5 of the 220 (a hundred and ten volts to impartial - or floor) and the black is featuring the different 0.5. i think - and that i'm no longer an electrician, i'm basically featuring you with truthful warning as to what would nicely be happening - that, ought to the pump be 220 volt, you'll have 2 black wires, one white cord, and the bare copper cord working to that pump. If it grow to be jerry-rigged, a short in the circuit on the pump itself ought to bring about it attempting to run each and every of the time. If it desires the a hundred and ten volts, then the twisted copper might, over the years, start up arcing and the pump ought to no longer start up. 'solving' the obtrusive issue (the arcing cord) might bring about the pump working each and every of the time (assuming the issue is in the switching circuit on the pump and likewise assuming that circuit does require a hundred and ten volts) - yet, curiously, the stress switching circuit nevertheless works. you will ought to verify the choose for 220 (i think you're desirable suited). you will opt to change the wiring with the right 3 conductor wiring (2 black and one white - the bare copper cord isn't considered a conductor because it extremely is for defense purposes in basic terms). you will additionally ought to learn the wiring for a plausible short to floor on the activate the pump itself. make constructive the capability is off. you have been fortunate; if the issue is a approach or the different shorted and the protection floor has certainly been improperly used as a conductor, that pump (the finished issue) would have been sitting at a hundred and ten volts basically waiting for somebody to seize it whilst donning damp footwear. Frankly, i might hire an electrician. This sounds like slightly bit a large number to me. solid success! desirable regards, Jim

Answer 3

220 BOTH wires are hot that is why they tape the white wire with black tape, That is also why 220 takes 2 spaces in the electrical panel 2 hot leads

Answer 4

Its either white or red, If it is a three phase it will be white, if it is 4 phase it will be red, dont confuse red w/ pink if it is red it will be noticebly red and not pink, perhaps you should have a look at your system schematics