Posted 17 Feb 2014 (edited) I have one question of Ground Symbols. Can you help me to understand those? Thanks for your help in advance. (Refer to the attached file.) Edited 17 Feb 2014 by Tom749 Share this post Link to post Share on other sites
Posted 18 Feb 2014 (edited) The three at the bottom row from left to right are: Signal ground Chassis ground Earth ground (protective ground) The top row I don't know at the moment Edit: I would guess the top left one is Insulated Earth ground, and the top right one is also a Chassis ground Edited 18 Feb 2014 by Bryll Share this post Link to post Share on other sites