What are overhead feeders and underground feeders?
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As shown in the figure, per the specifications for power supply entry into the cabinet room, what are overhead power supplies and underground power supplies?
Aerial means in the air, while underground wiring means buried underground!
An overhead cable entry involves making an opening in the wall at a high height; the cable tray then passes through this opening from above and descends below the anti-static floor. In this way, the cables are located above, preventing water accumulation, and small animals on the ground cannot crawl in through the openings in the cabinet area. An underground cable entry refers to a type of entry system similar to a cable trench; a trench is dug all the way into the room, and the cables are carried upward from underground, beneath the anti-static floor. This approach involves creating openings below the floor, and during rainwater accumulation can occur in these trenches. The cables can then get soaked by water, and animals such as rats that can penetrate through holes may also enter these trenches and damage the cables.