For large openings, install a fire-resistant backing plate before sealing. Choose appropriate fire protection materials, such as fire-rated board, firestop packs, firestop mastic, or. Enclosures for preventative fire protection, A2, F30/F90, I30/I90, E30/E90 Preventive fire protection is not only a matter for those constructing a building. In planning and designing their installations, expert electrical planners and engineers or switchgear manufacturers are responsible for. Safely conduct, connect and distribute energy in hazardous areas with R. We offer bespoke, custom-made terminal boxes and terminal box combinations, as well as standard products with short delivery times. Our products are certified for installation technologies all over the. Scope: Firestopping for busway, cable trays, cables, and trunking passing through walls in enclosed electrical installations. The electric box main body comprises an upper cavity and a lower cavity, a flame-retardant partition plate is connected between the upper cavity and the lower cavity, and. EJB Series flameproof connection boxes are suitable for installations in areas where there are risks of explosion and also at places where dust or combustible gases are present. They are classified for Zones 1, 2, 21 and 22. Available in aluminum or stainless steel AISI. The design and installation of explosion-protected distribution and control boards having flameproof enclosures require considerable experience and careful conside-ration of relevant regulations in relation to the application data. Only thus are technically and econo-mically satisfactory solutions.