Symbol 5857 from IEC 60417 - Title/Meaning: Lamp test Function/description: To test the functionality of all lamps and controls, for example industrial facilities or system panels.
Additional information: 
Published in: Amendment 2, 2002,3C/607/FDIS,3C/506/CDV,3C/430/CD,3C/388/NP
Own work using: iso.org/obp/graphics/grs/6c1098a0-864c-4018-822b-beddced264b3 200.png
Vectorization:  Mrmw