Using non-standard symbols can lead to an inspection failure.
In Belgium, every electrical installation must be inspected by an authorized body before it is put into service or when a house is sold. The inspector uses your electrical plans to verify that the installation is safe and compliant with current regulations. symbolen arei
It is also possible you are asking about the (specifically the card named "Arei" or cards depicting similar archetypes), as "Symbolon" is a famous psychological astrology deck. Using non-standard symbols can lead to an inspection failure
(translated from the Old Tongue as “Signs of the Turning Wheel”) refers to a closed symbolic system consisting of 27 primary glyphs and 144 sub-glyphs. Believed to originate from a pre-industrial theosophical movement in the northern river valleys, these symbols encode principles of cyclical time, elemental dissonance, and spiritual alignment. It is also possible you are asking about