1, "National Building Standard Design Atlas 09DX001 Building Electrical Engineering Design Commonly Used Graphic and Text Symbols".
2, the national standard GB/T 50786-2012 "building electrical drawing standards" has also been released and implemented. Which "common symbols" chapter also contains "graphic symbols" and "text symbols" content.
Supplementary:
MNS series of low-voltage distribution cabinets standard vertical bus specification is 1000A, that is, each cabinet can provide 1000A within the distribution load capacity, beyond 1000A (such as the need for 1600A) to use double vertical bus, can be done to 2000A, these parameters should be checked in the samples of different series of low-voltage cabinets.