Gain a comprehensive understanding of coax cabling riser diagrams and their relevance in mapping out cable distribution throughout a building. Learn the significance of symbols, legends, and keys, and how they contribute to the overall schematic representation of a coax cabling riser diagram.
Key Insights
- The coax cabling riser diagram is a schematic representation that illustrates how coax cables are distributed throughout a building. It is very similar to the electrical riser diagram.
- The diagram uses a symbols legend, general notes, and raceway and coax cable keynotes to provide detailed information. The diagram avoids confusion by jumping from H to J, thereby eliminating the risk of mistaking an I for a 1, or an O for a 0.
- Understanding the diagram is vital for comprehending how cables, such as those for power feeds, audio visual, and cameras, are distributed. It also sheds light on how cables are fed from one floor to another in buildings with concrete floors using sleeves.
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Let's spend a few minutes looking at the coax cabling riser diagram. This is very similar to the electrical riser diagram we reviewed earlier, in that it's a schematic representation of how the coax cables are distributed around the building. As with many of these other drawings, we have the symbols legend, which should look familiar.
We have our general notes, as well as raceway keynotes and coax cable keynotes. This follows the same format as the previous sheet—raceway keynotes use alphabetical characters, and coax keynotes are numeric. As I mentioned before, you can see here that we jump from H to J to avoid confusion between the letters I and O and the numbers 1 and 0. We're going to pan down to the very bottom, and this should look familiar.
Remember, we had the power feeds down here, and then we have cameras in the elevator lobby at the parking level. We have audiovisual cameras likely located in public spaces and/or elevators, and cameras here in elevators. I'd like you to notice the sleeves—because this building has concrete floors, sleeves were included to allow cables to be routed from one floor to the next.
Again, more distribution—telecom rooms were located on both the left and right sides—and then you can see how everything is routed up to the antennas and satellites. So again, this is a schematic representation of how the coax is distributed throughout the building.
Well, this completes our review of the technology drawings, and actually, this is the last of our drawing segment review.
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The next thing we’ll be shifting into is learning about specifications, including how specification packages are generally organized. Then we'll go through an example so you can gain a thorough understanding of specifications.
Again, thank you very much. I've enjoyed working with you so far and look forward to continuing with our specifications booklet.