Connect PCB ground to Metal enclosure?

Discussion in 'General Electronics Chat' started by ke5nnt, May 23, 2013.

  1. ke5nnt

    Thread Starter Active Member

    Mar 1, 2009
    If I have a microcontroller circuit mounted inside a metal enclosure powered off a 12V DC PSU, is it good practice or recommended to connect the PCB ground to the enclosure?
  2. LDC3

    Active Member

    Apr 27, 2013
    Connect the ground wire from the AC connection, I wouldn't bother with the ground from the 5V circuit. Since the idea of connecting a ground to the chassis is to reduce shocks from high voltage wiring, then there is no need to connect a ground from 5V circuits. There also might be feedback that can cause strange behaviour.