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  • When creating electrical and lighting plans in AutoCAD MEP, you begin by adding electrical equipment. This is equipment made up of items

  • referred to as targets and sourcesitems that distribute and receive power in a model. Electrical equipment is defined as a multi-view part that

  • includes items such as switchboards and motor control centers. These parts include connections for adding conduit. Panels are another form of

  • electrical equipment, but these items can also have circuits and electrical loads assigned to them, and may also be assigned to other panels, so their load

  • is transferred to the upper panels. Lights and power devices are connected to panels, and the load assigned to these devices is passed up to the

  • panel, so it’s best to locate your panels early in the job. Let’s see how this works. Make sure you have the Livgren project for chapter 4 open. From the

  • constructs tab, open the Electrical Base – 1st floor. When using Project Navigator, all physical objects are created in a construct, so this is the right file to

  • be working in. The architectural plan is already loaded into this construct. We want to add a transformer and panels to the plan, and a generator

  • to the outside of the building. To place electrical equipment, make sure you have the Electrical workspace set current. Once the workspace is

  • current, you have two places to locate equipment commands. The first is the HOME tab and the Build Panel. The equipment tool is a flyout, which

  • includes common components, such as a generator, junction box, motor control center and switchboard. The other location is the tool palette

  • make sure you can see the palette, and then go to the Equipment tab. Select the Emergency Power Generator - Gas tool to place a generator. The

  • MVPART palette will appearthis is a floating palette, and can be pinned into place, or set to autohide. Leave it pinned. The tool from the palette

  • is set to jump directly to the category for generators. Select the Emergency Power Generatorgas. This is importantcheck the

  • elevationthis is the only thing you really need to know about working in 3D – this sets the height or Z elevation of the part, based on the insertion point

  • of the part. Set this to 0", so it is placed on the ground. For the part size name, select the 25kw Gas Emergency Power Generator. If the dialog is

  • pinned, left click once in the model space area to place the part. Select a point on the east side of the building, outside of the storage room. The MEP

  • compass will appear, showing the increment angles that can be used to place the part. Pick a point as shown, and then set the rotation to 180

  • degrees. While the dialog is still open, make sure the Part tab is selected. Scroll down in the list until you find the Power Transformers. Select the Dry

  • Type 225-300kVA dry typepick the 225kVa part size, and check the elevationit should still be set to 0 from the generator. Select a point in the

  • electrical room, and then rotate the unit 270 degrees. The next item we want to place is a panelthis serves as a power source to other power and

  • lighting devices. In order to set information for the panel, the properties palette cannot be hiddenso select it if auto hide is turned on for the palette.

  • Pick the panel tool. Immediately go to Propertiescheck the style. When the style is picked, you open a master drawingthis contains panel styles,

  • which set the block image and behavior of a panel. Pick the surface category, and then pick the SURFACE SOLID – 42 slots. Select OK to

  • continue. Panels can be placed and rotated just like an MVPARTbut since were using AutoCAD Architecture backgrounds, you can also use the

  • ALIGN TO OBJECT option. On the properties palette, change Align to Objects to YES. Notice how the panel aligns to the wallnow we can turn

  • snaps offdo this on the system tray at the bottom of the screen. Next, go to the elevation option on propertiesset this to 5’ – this places the center of

  • the panel at 5’ above the finished floor. Skip over the circuit section for nowgo the design data area of the properties dialog. Set the name to LP1.

  • Set the Rating to 150. Make sure the voltage phase to neutral is set to 120, and the voltage phase to phase is set to 208 – you can adjust

  • these to 277 and 480 if you want to use a higher voltage, as an example. This forces the panel to only allow objects that have the same voltage

  • phase to neutral settings to be connected to this panel. Set the phases to 3 and the wires to 4, so the panel can include single, double and three pole

  • circuits. Leave the Main type to Main Lugs Onlyanother option is Main Circuit Breaker. Well save this for the higher panel. Leave the remaining

  • options unchanged. Next, pick Yes to create circuits, and then choose Circuit Settings. Circuit settings control the behavior of the panel. From

  • here you can set the system type, the number of slotsset this to 42 for now. And then set the number of circuits to 2 – we can always come back

  • and add more later. Leave the circuit descriptions to spare and space for circuits that are with or without breakers. Select OK, and then place the

  • panel on the wall. Press enter to complete the command. You can continue to add parts and panels using the equipment or panel dialog, or you

  • can use the AutoCAD Copy command. Watch as I select the partsthen I right click, choose Basic Modify tools, and then choose Copy. I’ll pick a

  • starting pointand copy what I need to another area of the room. Once these are placed, youre ready to start adding target devices such as lights

  • and receptacles. The panels are a necessary first step in order to create power circuits and track loads associated with power devices.

When creating electrical and lighting plans in AutoCAD MEP, you begin by adding electrical equipment. This is equipment made up of items

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