We have a complex network of earth wires and earth pits. These earth wires are connected to power panels and CNC machines. However, the earthing system is very old and poorly maintained.
Is there a way to check if the panel/ machine is properly earthed or not?
Obviously, visual inspection and line tracing is an option to trace the connectivity of earth wire, but I am looking for a more efficient solution.
For example - Is there any specific method to test if the body of earthed machine/ panel is at earth potential and will remain as such?