|  | 9.4 | Structured Cable Run Installation
| 9.4.5 | Building safety
Always find out in advance what the local codes are. Some building codes may prohibit drilling or cutting holes in certain areas such as fire walls or ceilings. The site administrator or facility engineer will be able to help you determine which areas are off limits. When you install cable, if you find damaged insulation, do not run cable into that area. In some situations, if you drill through walls, you may have to fill holes completely with a non-combustible (meaning cannot catch on fire) patching compound. Again, the facility engineer will be able to help you identify where this will need to be done. Finally, if you find that you must route cable through spaces where air is circulated, you will need to use a fire-rated cable.
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