Standard fire-resisting cable: 30 min survival (BS EN 50200 PH30 + water spray). Required for unsprinklered buildings >30 m, phased evacuation, hospitals, and other high-risk sites. Initially in the 16th Edition of the Wiring Regulations this was a short chapter covering some basic requirements for protection against fire, burns and overheating. In planning and designing their installations, expert electrical planners and engineers or switchgear manufacturers are responsible for. The FireBox portfolio from OBO connects safety-relevant electrical cables in a fireproof manner. The FireBox is approved for the maintenance of electrical function according to DIN 4102 Part 12. Mineral insulated copper cable (MI. rotect people from fatal or irreversible injury in fire.