I have two pump motors in a pump house (about 10 feet square). The main power feed to each pump is 3-phase 230VAC via a fusible disconnect panel within the pump house. There is a common controller panel that alternately activates each pump (or both simultaneously if conditions warrant). The power to the controller is fed from a 20A 2-pole breaker in a single-phase subpanel; both the controller and the subpanel are also within the pump house. Inside the controller are two 25A 2-pole breakers (both off the same 20A main controller feed) that normally would supply small pump motors; currently these are unused.
Rather than tap power off each of the motors' main feeds to energize the associated control and starter circuitry, I'd rather take the control/starter power from the controller panel. I was thinking of using the two 25A breakers in the controller panel to feed each of the pump's control circuit. That would mean that each control circuit could be individually shut off at the control panel, or both control circuits could be de-energized by turning off the 20A breaker to the controller at the subpanel.
So now my question...
NEC 430.75 (Disconnection) states regarding motor power and control circuits: "Where separate [disconnecting] devices are used, they shall be located immediately adjacent to each other."
So what exactly does "immediately adjacent" mean? The panels are within sight of each other? The panels are both on the same wall? The panels are within 12" of each other? The panels are touching?
In my case, the main fusible disconnect for Pump #1 is on one wall and the controller for both pumps is on the same wall within 3 feet. The fusible disconnect for Pump #2 is on an adjacent wall within perhaps 4-5 feet of the controller. The fusible disconnect for Pump #2 is also on the same wall as the subpanel (that energizes the controller), within 1 foot of each other. For my application, do the panels qualify as "immediately adjacent"?
Rather than tap power off each of the motors' main feeds to energize the associated control and starter circuitry, I'd rather take the control/starter power from the controller panel. I was thinking of using the two 25A breakers in the controller panel to feed each of the pump's control circuit. That would mean that each control circuit could be individually shut off at the control panel, or both control circuits could be de-energized by turning off the 20A breaker to the controller at the subpanel.
So now my question...
NEC 430.75 (Disconnection) states regarding motor power and control circuits: "Where separate [disconnecting] devices are used, they shall be located immediately adjacent to each other."
So what exactly does "immediately adjacent" mean? The panels are within sight of each other? The panels are both on the same wall? The panels are within 12" of each other? The panels are touching?
In my case, the main fusible disconnect for Pump #1 is on one wall and the controller for both pumps is on the same wall within 3 feet. The fusible disconnect for Pump #2 is on an adjacent wall within perhaps 4-5 feet of the controller. The fusible disconnect for Pump #2 is also on the same wall as the subpanel (that energizes the controller), within 1 foot of each other. For my application, do the panels qualify as "immediately adjacent"?