Aroused unexpected interest our last article in which it appeared in a nutshell, the new standard (Code) NFPA 72.

The reason is probably linked to the considerable technical and editorial gap that exists between the American standard, solid and complete, and the European equivalent, EN 54-14. The latter has only the rank of a guideline and not a rule (which is why there is the UNI 9795), and is dated November 2004.The continued lack of a European agreement on the identification of a rule o