Explore the analysis of a power plant building plan with the use of a Revit model, highlighting key elements such as power notes, fire alarm notes, keynoting schedules, and different kinds of outlets and their connections. Understand the significance of grayed back drawings, the importance of construction grid lines, the interpretation of symbols, and the rationale behind the use of arcs for displaying connections.
Key Insights
- The architectural model of the power plant is purposely grayed back to distinguish it from the electrical plan, since the focus of the drawing is the electrical layout and not the building's structural details.
- Key elements of the drawing include power and fire alarm notes, a keynoting schedule, indications of which outlets connect to specific electrical panels, and the use of arcs to represent connections between outlets to avoid confusion with the building's geometry.
- The use of a Revit model helps in providing a clear and comprehensive representation of the power plant's electrical layout, enabling easier understanding and interpretation of the plan.
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Let's spend a few minutes reviewing this power plant. One of the first things that you'll notice is that the building itself is grayed out. All the plans that we've seen before have mostly been in black and white.
Some have had a little bit of color. But what has happened is that the Architect has provided a Revit model to the electrical engineers, and they are using it as a reference background for the drawing, and it's purposely grayed out. Because it is not pertinent, the construction grid lines are not shown on this drawing.
Now, we’re working on part B of the building. We can see that on the key plan. The name of the drawing is provided here.
It is also provided here, along with the scale, an eighth of an inch equals one foot. There are power notes and fire alarm notes. There's also a keynoting schedule, and here are the values that will appear in the keynotes.
I will zoom in on this area. You can see from the symbols list that we have the different kinds of symbols, so different kinds of outlets. You can see, for example, that this symbol connects to electrical panel P1LHP2 TAC-20.
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This outlet connects to panel P1LHP2 TAC-18. Same panel, different locations within it. You will also note that keynote 6 is located in the same general area.
These two GFCI outlets are connected by that wire, and they are going to panel box P1LHP2 TAC-27. Similar information is shown here. Again, junction boxes are included.
You will need to refer to the legend sheet to find out specifically what that represents. You can see an enlarged plan for the main electrical room. It is image 1 on page E-306.
All of these panel boxes are shown in much more detail on that drawing. If I zoom in on this area, similar terminology is used. The outlets show which panel box and location they are connecting to.
This information is also detailed in the electrical panel schedules. These wires indicate which outlets are connected on the same circuit.
It is normal to use arcs to represent the connections. Straight lines should be avoided to prevent confusion with the building geometry.
And that concludes our first panel plan.