Wire - Conduit sizing...

[milmat1]

We are building a new machine for a customer. I have a MCC / Control cabinet to set at machine containing all my MCC PLC and Controls. Now they want us to supply a separate hydraulic control panel that is remote to the machine by about 150 feet. This hydraulic panel is a 200A panel, (controls for 2 -50HP pumps, heater, fan etc).
This run will add another 200 amps to my main service at the machine. I tried my best to get the customer to provide a separate service to this hydraulic panel but he is very reluctant..

My question is regarding the service to the hydraulic panel, which will be in the concrete.

The size conductors and conduit...And any special land mines I should be aware of ?

480VAC 3PH 200A service for 150 feet....

 

[Carultch]

We are building a new machine for a customer. I have a MCC / Control cabinet to set at machine containing all my MCC PLC and Controls. Now they want us to supply a separate hydraulic control panel that is remote to the machine by about 150 feet. This hydraulic panel is a 200A panel, (controls for 2 -50HP pumps, heater, fan etc).
This run will add another 200 amps to my main service at the machine. I tried my best to get the customer to provide a separate service to this hydraulic panel but he is very reluctant..

My question is regarding the service to the hydraulic panel, which will be in the concrete.

The size conductors and conduit...And any special land mines I should be aware of ?

480VAC 3PH 200A service for 150 feet....

From a voltage drop point of view, it looks good. I'd run 3/0 Cu wire in a 2 1/2" conduit with a #6 ground, or the equivalent aluminum, unless someone else can speak to how motors would affect the situation.

 

[kwired]

From a voltage drop point of view, it looks good. I'd run 3/0 Cu wire in a 2 1/2" conduit with a #6 ground, or the equivalent aluminum, unless someone else can speak to how motors would affect the situation.

the voltage drop during starting would be one possible issue - but mostly only if you have some control device that doesn't like it - the motors will be just fine.

 

[augie47]

The devil will be in the details.
As far as the motors go, you could get by with a 1/0 for a feeder but since you have other loads you may well need the 3/0. With those loads, at that distance, I would not be concerned about voltage drop.

 

[milmat1]

Thanks for the input everyone..

The two 50HP motors, a 5HP cooling fan and a 4000W Heater are in the remote panel. Everything will be started/stopped from the main operator location near the primary cabinet. I will start these two motor 2 seconds apart to prevent the giant inrush should they just slam the buttons. (and they will).

It really stinks because now I need to double my main disconnect just for this run. At nearly double the cost Plus the conduit / wiring, adds several $K$

Thanks Again !!