CoolHand
Hot Rolled
- Joined
- Sep 6, 2005
- Location
- Missouri . . . Near the Middle.
Currently my three phase equipment all run off of a single 25hp RPC.
It's all hard wired, no load center, no breakers (except the big one in the single phase load center that runs the RPC), etc. Don't scold, poor folks got poor ways, and it's worked just fine for about ten years now.
Anyway, I've got another VMC coming in with a 15hp spindle and I don't think that 25hp RPC is going to be able to handle it all by itself, so I'm thinking of tying another 15hp RPC I already own into the system while also changing over to a load center with breakers for the three phase, to kill two birds with one stone.
My plan is to run out of the RPCs into the mains bus bar on the three phase load center, and then wire each of the three phase machines from there, each on its own breaker, just as if I had three phase from the pole.
Is this a workable plan? I don't see why it wouldn't work, but since I'm not omniscient, I thought I'd better ask some other folks what they thought.
My one question is this: Can I just tie both RPCs into the main bus bars on the load center the same as if they were mains from the electric company? If I do this, is there any special precautions I need to take to prevent one RPC backfeeding from the other if I decide to only run one of them?
I would assume that the contactors inside the RPC cabinet would prevent such a thing from happening, since they'll break all three legs on the output when open, but I thought I'd better ask.
Thanks for reading, and any help you all can lend.
It's all hard wired, no load center, no breakers (except the big one in the single phase load center that runs the RPC), etc. Don't scold, poor folks got poor ways, and it's worked just fine for about ten years now.
Anyway, I've got another VMC coming in with a 15hp spindle and I don't think that 25hp RPC is going to be able to handle it all by itself, so I'm thinking of tying another 15hp RPC I already own into the system while also changing over to a load center with breakers for the three phase, to kill two birds with one stone.
My plan is to run out of the RPCs into the mains bus bar on the three phase load center, and then wire each of the three phase machines from there, each on its own breaker, just as if I had three phase from the pole.
Is this a workable plan? I don't see why it wouldn't work, but since I'm not omniscient, I thought I'd better ask some other folks what they thought.
My one question is this: Can I just tie both RPCs into the main bus bars on the load center the same as if they were mains from the electric company? If I do this, is there any special precautions I need to take to prevent one RPC backfeeding from the other if I decide to only run one of them?
I would assume that the contactors inside the RPC cabinet would prevent such a thing from happening, since they'll break all three legs on the output when open, but I thought I'd better ask.
Thanks for reading, and any help you all can lend.