Cable tray metal pans are typically used in normal indoor environments (as they are suitable) for bright electroplating, as the tray itself is made of metal sheets, as long as it is not a severe corrosive property that can be handled by metal tray wire operations.
Plastic cable trays are not only suitable for use in normal indoor environments, but they are also ideal for educational and scientific research innovation laboratories. They can be employed in projects where concealed installation is not feasible (such as precast structural projects), for the renovation of outdated technologies where timely line replacement is needed, and in workplaces where concealed wiring within ceiling installations is required.
Metal conduits must be reliably electrically connected to PE or PF. The grounding conductor of the equipment should not be a metal conduit. Unless there are special requirements in the design, the entire length of the conduit should not be less than two connections to the main PE or PEN cable.