Symbol 5855 from IEC 60417 - Title/Meaning: Minimum supply capacity Function/description: [To indicate that the equipment is intended only for use in premises having the low-voltage supplies with current capacities equal to or greater than 100 A per phase.]
Additional information: 
Use of this symbol relates particularly to the conditional connection of equipment to 400/230 V public supply networks in accordance with IEC 61000-3-11, clause 4
Published in: Amendment 2, 2002;3C/607/FDIS;3C/506/CDV;3C/430/CD;3C/408/INF
Own work using: iso.org/obp/graphics/grs/a4686ed0-3385-487f-97ee-6891296297dd 200.png
Vectorization:  Mrmw