The enclosures are certified Ex d IIB+H2 and Ex tb as well as "explosion-proof". They are available in many sizes, a wide range of operating elements and monitoring functions can be integrated. All explosion-proof enclosures, lighting or power distribution boxes are manufactured using the latest technologies, both mechanical and. Terminal boxes and junction boxes from Pepperl+Fuchs are designed to protect signal and power distribution networks in explosion-hazardous and challenging environments. BARTEC. Extol International are the leading suppliers of Control Panels & Distribution Boards for hazardous areas and explosive atmospheres – a comprehensive range of Explosion Proof control panels are available with ATEX certification and explosion protection to Ex d / Ex'de concept suitable for Zone 1.