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Electrical Wiring 240V Outlet - Nema 10 connectors are unlawful** for new paintings and have been for a while, they're only felony and offered for changing damaged ones already hooked up. It has been completely changed via nema 14, which is the same thing with a ground, or nema 6 in case you do not need neutral. Any of them might grasp phases a and c on this drawing.
After studying these values i figured i screwed up, so i removed the plug and positioned the whole lot lower back to how i found it. However, there has been every other 240v plug in the store that become already there so i determined to test it and it examine the identical values.
Commonly on this form of wiring, you do not just installation random receptacles. You wait until you already know precisely what device will go there, after which provision the energy it calls for, the use of the receptacle that's correct for that. (E.G. Nema 15 if he wants 240 three-phase).
It looks to me like they grabbed the wild leg by means of mistake. This would happen in the event that they have a 3-section provider panel and they positioned the two-pole breaker in the incorrect breaker role (because they do not know what they have been doing).
** by using context, we're in the local habitat of the nema 10 receptacle, i.E. Us, canada and the relaxation of north the united states. [We also claim colombia because shakira.] Eradicating nema 10 is a first-rate practice anywhere it exists. Do not confuse "poorly enforced" with "criminal".
As you in all likelihood know, on most cut up-segment panels (one hundred twenty/240), each different breaker row on the panel is the alternative leg, a b a b a b a b a b. And so in case you use a 1-space breaker, you get 1 pole, and if you use a 2-area breaker, you get 2 poles and consequently 240v. It does not certainly count which 2 spaces you use. Thoughts you, the countrywide electric code specifies which particular segment need to be wild-leg on the panel. If it's wrong, i might restore it, however beware - there is a difference between swapping 2 stages and rotating all 3, and the difference is motors will run backwards.