Symbol 5939 from IEC 60417 - Title/Meaning: Power supply type of electric device Function/description: To identify the type of power supply, socket outlet with 3-poles.
Additional information: 
Published in: 3C/901/FDIS
Own work using: iso.org/obp/graphics/grs/6fec38b7-01a0-4f88-9b8f-7f1e3abac665 200.png
Vectorization:  Mrmw