Symbol 5019 from IEC 60417 - Title/Meaning: Protective earth; protective ground Function/description: To identify any terminal which is intended for connection to an external conductor for protection against electric shock in case of a fault, or the terminal of a protective earth (ground) electrode.
Additional information: 
Title was editorially improved.;Class I; PE.;See also Class II and Class III per IEC 61140
Published in: Supplement G, 1985;Supplement C, 1977
Own work using: iso.org/obp/graphics/grs/7bfb60e3-8041-4539-a956-84bdccaf2e77 200.png
Vectorization:  Mrmw