Are there any national standards (strength, protection grade) in the case of GRC materials used as equipment and outdoor rooms?
Yes。Implementation of national standard GB/T 17467-1998 "high voltage / low voltage prefabricated substation".
Only depending on your equipment, see if there are any special requirements, and then refer to the GRC standard.
There are standards mentioned upstairs, but there is no standard for GRC materials used in outdoor rooms
