Earthing and Potential Equalisation (IEC 61537)
Primary potential equalisation is required for each building. The purpose of primary potential equalisation is to prevent dangerous voltage differences between conducting components that could be handled simultaneously. Potential equalisation is a process wherein components that are exposed to voltage or are otherwise conductive are connected to the same potential, which eliminates the difference in potential.
Generally, the building’s metal pipelines (HVAC), structural metal parts, and primary structural concrete reinforcements are connected to the equalisation system in the applicable parts. Metal cable management systems may also be considered structures that should be included in the potential equalisation system.
Protective Earthing and Potential Equalisation for Cable Trunkings Aluminium cable trunking systems do not generally require protective earthing or a connection to the potential equalisation conductor. In some customer-specific cases, protective earthing or potential equalisation may be required in aluminium cable trunking, for example to avoid electrical interference
In some customer-specific cases, protective earthing or potential equalisation may be required in aluminium cable trunking, for example to avoid electrical interference.
