This comes up a lot on other forums and the consensus is that it is not a violation. Obviously you will only have 2 phases active unless you jump to phase C from one of the others. In either case there is nothing in the NEC that suggest this is a violation unless you might want to use 110.3(B). I don't believe the instructions state that all 3 phases must be used.
(B) Installation and Use. Listed or labeled equipment shall be
installed and used in accordance with any instructions included
in the listing or labeling.
Rechart Grand said:
A distribution to the panel board which feeding a 3 ph load, is done with only two phases a and b but c is missing. Is this a violation of code???
I need some more context. It feels like we are only getting only half the story. Or I'm not clear on what you are saying.
My translation is:
You have a panelboard feeding 3-phase loads, which, of course means the panelboard has to be 3-phase. However, the feed to the panelboard is only two legs of the three phases
If this is so, I wouldn't worry about the code. The load is not going to work. And that is going to irritate the owner. And nobody wants an irritated owner with a cricket bat chasing one down.
So, I'm thinking, I am not clear on what you are saying.
carl