Functional markings of distribution boxes

ISO 780:2015 specifies a set of graphical symbols conventionally used for marking of distribution packages in their physical distribution chain to convey handling instructions. Knowing your distribution box helps you see which breaker does what. Check and update your labels often. Use. formation and meet permanency of marking requirements. These markings can include electrical ratings, use instructions, warnings regar ing potential safety hazards, and cautionary markings. Consequently this document uses the writing IEC 61439 / EN 61439 in the following. IEC 61439 / EN 61439 shows how a low-voltage switchgear assembly, which is safe for the user, can be built. [pdf]