|  | 8.9 | Design Practice No. 2: Multiple Earth Ground Problems
| 8.9.8 | Company B: backbone media
This will be a new installation; therefore, the networking media for the horizontal cabling will be CAT 5 UTP. Now you must determine which types of networking media you should use for the backbone cabling. After a preliminary study, you have narrowed the choices to two types - CAT 5 UTP and 62.6/125 µ fiber-optic cable. There are, however, two more factors that could influence your decision - safety, and distance. In light of this, you must consider the following points: The building has three different earth grounds. Could this present any safety problems for company B's network? Company B's network will occupy only three floors of the building; distance will not be a factor for most of the backbone cabling runs. It will, however, be a factor in one backbone cabling run. Can you identify where this run will be located?
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