Control requirements for isolated conductors

Hi, everyone! I would like to know why the control of the potential difference between the isolated conductor and the ESDS item is required to be less than ±35V (e.g., why not less than ±40V or some other parameter)? Is there any experimental evidence for this?

Hi, the ±35 V is based on what is easily accomplished by use of an ioniser (selected according to the standard) to neutralise charge on an isolated conductor.

There is also some information in the Industrial Council White Paper One that implies a HBM withstand level will give you some protection from isolated conductors.