Motor Control Centers

To create a motor control center, go to

DM ElectricalOne Line DevicesMotor Control Centers

A Motor Control Center dialog box will appear. To actually create a new motor control center, press the New button at the bottom of the dialog box. Another Motor Control Center dialog box will appear after Design Master asks you to enter the callout for the new motor control center you are creating.

Listed below are all the different fields and inputs found in the dialog box above. These fields all help to define the motor control center in some way and are divided into three main categories. The first portion focuses on the definition of the motor control center itself, followed by the fault analysis information, and then the specifications of the motor control center feeder wires.

General Motor Control Center Info

Field	Sets
Total Connected KVA	Displays the current, connected KVA load on the MCC.
Total Connected Amps	Displays the current, connected amps load on the MCC.
Volts	The voltage and number of poles for the MCC
Horizontal Bus Amps	Amp rating for the horizontal bus feeding the vertical buses.
Vertical Bus Amps	Amp rating of the vertical buses.
Main Disconnect Type
Main Disconnect Amps
Mounting	Mounting type for the MCC.
Neutral	Size of the neutral bus (which should not be confused with the feeder neutral conductor)
Number of Starters	Number of starters in the MCC.
Number of Sections	Number of sections in the MCC.
Plan View Block	There is only one option available when creating the plan view block, and that is Custom Rectangle. You must define the dimensions for each MCC individually.
Custom Dimension	Input for defining customized MCC block sizes.
Layer System	Indicates what layering system the MCC block will be drawn on.
Schedule Block	Where you can select the panel schedule graphic to associate with the MCC.
Location	Field reserved for entering the physical location of the MCC in the building.
Note 1	Creates a note in the upper left hand corner of the MCC schedule. The note may also be inserted with the panel on the one line diagram.
Note 2	Creates a note immediately below the MCC schedule. The note may also be inserted with the panel on the one line diagram.

Fault Analysis

Field	Sets
Feeder Length (ft)	Length of the conductor from the device feeding the MCC. Can be automatically calculated by Design Master, or input manually.
Fault @ MCC (amps)	The fault current at the MCC primary. Can be automatically calculated by Design Master, or input manually.
MCC AIC Rating	This is where you may set the AIC Rating for the MCC. This is set manually. There is also a field to enter a custom AIC Rating below this one.

Feeder Specification

Field	Sets
Fed From	Displays where the MCC is fed from. See the section on One Line Device Connections for more information.
Description in Upstream Device	How this panel appears in the schedule of the device feeding it. Defaults to Motor Control Center Callout, but may be customized.
Upstream OCP	Amp rating of upstream breaker or fuse in the device feeding the MCC.
Conductor Amps	Select automatic sizing for the conductors, or use this field to select a specific conductor size.
Neutral	Choose to size the neutral wire at 100% or 200% of the phase conductors, select a specific conductor, or have no neutral at all.
Ground	Choose to automatically size the ground per the NEC as a service or equipment ground, or select a specific size.
Feeder IG Conductor	Toggle on or off an Isolated Ground conductor.
Conduit Size	Choose to size the conduit automatically, or select a specific conduit size.
Size	This field displays the conduit and feeder sizes for the MCC, based on the settings above.

The New, Copy, Save, Delete, Rename, and Find buttons work as they do for panels.