Temporary Power Supply 004: Why should the distance between the distribution box and the final distribution box not exceed 30 meters?
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This post was last edited by Shutong on 2024-7-2 12:21. Temporary Power Supply 004: Why should the distance between the distribution box and the final distribution box not exceed 30 meters? My opinion: For switch boxes, it is necessary to implement a system of one circuit breaker per machine. There are many such switches, and they are scattered throughout; in addition, electrical equipment is often moved from one place to another. Therefore, it is not practical to install repeated grounding devices at these switch boxes. Instead, the PE wire (one of the four wires) must be taken from the distribution box that is upstream of this switch box. If the distance between this distribution box and the switch box exceeds 30 meters, the grounding resistance increases, resulting in a too low grounding current that cannot conduct electricity to the ground in a timely manner, thus creating a safety hazard! I’m also an amateur when it comes to electricity; I’m not sure if that’s correct Everyone is welcome to participate in the discussion
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The distance between the distribution box and the final distribution box should not exceed 30 meters, in order to reduce voltage losses during power transmission and minimize the length of wires and cables, thereby ensuring a stable supply of electricity and safe usage. Excessive distance increases the line impedance, leading to unstable power supply and affecting the proper operation of the equipment. .
Beyond 30 meters, line losses increase significantly, having a substantial impact on electrical equipment.
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