Guidelines for Local Grounding for Devices and Machines

Guidelines for Local Grounding for Devices and Machines

Local grounding In addition to the grounding system for the entire system, expanded systems in a plant must also be equipped with local grounding for devices and machines to ensure a good equipotential bonding. The local grounding systems are connected to the plant grounding system.

Guidelines for local grounding The following guidelines should be observed to achieve a good local equipotential bonding:  An unbroken link (daisy chaining) should be made between all metal device and machine structures:  Switching cabinet  Earth plane plate on cabinet floor  Cable duct  Pipe and sheathed cable lines  Supporting components and metal chassis from machines, motors etc.  Special earth conductors may be required to complete the ground connection. Example: Both ends of a cable conductor which is not used are connected to ground.  The local ground connection must be connected to the main system network, whereby a maximum number of distributed ground connections should be made.