Understanding Electrical Schedules: Analyzing Circuits and Panel Boxes in Buildings

Understanding Electrical Schedules and Panel Box Layouts in Building Drawings

Gain a comprehensive understanding of electrical schedules, the details they provide, and how they reflect the setup of each load center within a building. This article deep dives into the essential information held within these schedules, from circuit numbers to KVA load factors and overall calculations.

Key Insights

  • The electrical schedules detail information of what circuits are connected to the respective panel boxes in a building, with each panel given a unique number.
  • Each panel box's details in the schedule show circuit numbers, breaker numbers, KVA load factors, overall calculations, and total KVA demand. Similar labeling occurs on the interior of the panel boxes themselves.
  • The uniformity across these schedules enables easier understanding and comparison of the different panel boxes and their corresponding circuits within a building.

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Let's review our electrical schedules. When you look at the page, you can see that there are 16 sets of information that are all fundamentally identical. And what they're showing is which circuits are connected to which panel boxes in a building.

From a big-picture standpoint, you can see that the panels are numbered. Now let’s zoom into this area. So here's the panel number.

You can see the circuit numbers on the left. Circuit numbers are also shown in the middle. If you've ever looked inside the panel box at your house, you will see something just like this.

We have the circuit numbers on the left, circuit numbers in the middle, and we can see the breaker numbers.

We can see where they are connected, the KVA load factors, overall load calculations, and total KVA demand on this panel box. Again, this is the type of information provided for every load center within the building. It’s always presented in the drawings, and similar labeling appears on the inside of the panel boxes also.

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So please feel free to spend a few minutes zooming in and observing the similarities between all of the different panel boxes.

Al Whitley

AutoCAD and Blueprint Reading Instructor

Al was the Founder and CEO of VDCI | cadteacher for over 20 years. Al passed away in August of 2020. Al’s vision was for the advancement and employment of aspiring young professionals in the Architecture, Engineering and Construction (AEC) industries.

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