Discover the essentials of electrical drawings as we delve into the intricacies of notes and legends. Explore the various elements found in these drawings, including lighting fixtures, fire alarm systems, and electrical symbols.
Key Insights
- All engineers typically include a notes and legends page in their electrical drawings, featuring general notes, and a variety of legends such as lighting fixtures and fire alarm systems.
- Electrical drawings also contain an electrical symbol legend, notes about the electrical symbols, and information about lighting protection system installation.
- Engineers make use of various graphical symbols in their drawings, such as drawing callouts, enlarged callouts, revision clouds, and revision triangles, all of which are critical to understanding modifications and revisions.
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Let's look at the first of our electrical drawings. This is the notes and legends. Typically, all engineers will have a notes and legends page.
For all disciplines, the pages tend to contain similar kinds of content. There are general notes. There's a lighting fixtures symbol legend.
You can see fluorescent lights here, recessed lights here. So lighting fixtures. There are fire alarm system legends, smoke detectors, heat detectors.
So in addition to lighting and fire alarm, there's also electrical symbol legends, single receptacles, duplex. There are notes about the electrical symbols, notes about lighting protection system installation. There are the listing of abbreviations provided by the engineer, graphical symbols.
So you can see the drawing callout, an enlarged callout, a section callout, north, revision cloud, and revision triangle. And again, whenever you make modifications to the set, you include revision clouds, and they are numbered. And those numbers are also included over here on the right-hand side of the title block.
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And then we have the electrical sheet index. This is included at the front of the drawing set, but the engineers typically include their own sheet index on their first page. So there we have it, a review of electrical notes and legends.
