Fiberglass cable trays are insulating materials; why do they need to be grounded?
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In fact, even though fiberglass is an insulating material, in explosive environments, static electricity can generate static sparks that reach the critical level for an explosion, thereby posing a danger； Taking into account factors such as lightning protection and preventing the risk to people caused by insulation breakdown of wires, fiberglass reinforced plastic cable trays should be provided with protective grounding.
Fiberglass cable trays are indeed an insulating material, so under normal conditions, they do not conduct electricity. However, there are the following reasons why we need to ground it. 1. Static electricity accumulation: Even though fiberglass cable trays are made of insulating materials, they cannot prevent the accumulation of static electricity. When static electricity accumulates to a certain level on the surface of the tray, it may trigger a discharge phenomenon. This type of discharge produces sparks, which can lead to fires or explosions. 2. Protection against lightning strikes: Similarly, although fiberglass cable trays are non-conductive, in a lightning-prone environment, high voltages can break down the insulating materials, allowing current to pass through. If the cable tray is grounded, this current can be effectively directed to the ground, preventing harm to people and equipment. 3. Equipment protection: In power systems, insulating materials may suffer insulation failures for various reasons (such as aging, mechanical damage, etc.), which can result in the equipment becoming energized. Equipment that is energized poses a threat to both personnel safety and the equipment itself. If the device is grounded, such current can be effectively discharged, preventing electric shock to people and ensuring their safety. Therefore, although fiberglass cable trays are insulating materials, we still need to ground them for safety reasons. .