A Grounding Option for Removable Boards From Fixed Housings

Let's say you have a housing fixed to a process control or network communications rail that you can slide in different PCBs pending needed functions....and you want to be sure the board inserted will ground to the housing with no more work then to simply slide it into the housing. You might consider coating the housing with conductive paint that will make contact with a spring-loaded contact mounted on the PCB. I initiated this option in a network design at a telecommunications company. Testing proved this option was able to eliminate ESD damage up to 16KV. I was able to locate an off-the-shelf contact thereby knocking out costly NRE charges had we gone the custom part route.