UNDERGROUND CONDUIT SYSTEMUnderground conduit has certain specific advantages over aerial cable; it's out of sight; adaptable to future cable placement and removal; secure from vandalism; and protected from most natural disasters.
Any underground conduit run needs careful planning, especially the location of pulling points, which, in turn, influence the location of maintenance holes (formerly called manholes), hand holes, and splice points. Follow the separation from other utility requirements.
AERIAL CABLING SYSTEMS
This method has the highest level of risk regarding natural disasters, or accidents, such as the possibility of lightning strikes, falling tree limbs, or accidental vehicle damage to utility poles. Consider that an aerial run detracts from the aesthetic appearance of the property, and the installation of hardware can damage the exterior of a building. The advantages are fast installation and readily accessible for maintenance and for any future alteration of the aerial runs. However, some local ordinances may restrict aerial construction.
You must plan a route that provides enough stabilized ground so that a line or splicing truck can be supported during installation and later, when maintenance of the aerial run is required.