Is the category for mandatory action signs which provide mandatory notices and instructions.
To signify a mandatory action
To signify that the instruction manual/booklet must be read
To signify that ear protection must be worn
To signify that eye protection must be used
To signify that an earth terminal must be connected
To signify that the mains plug must be disconnected from electrical outlet for the purposes of maintenance of electrical equipment, in the case of malfunction or when left unattended