A flameproof enclosure’s effectiveness stems from its ability to contain flames within, čak i kada dođe do eksplozije unutar kućišta električne opreme. Ovo zadržavanje je osigurano sprečavanjem izlaska plamena kroz različite spojne površine.
Pridržavanje specifičnih standarda u pogledu jaza, dužina, and surface roughness of these joints is crucial. These gaps not only extinguish the flames but also cool them effectively. They reduce the temperature of the flames passing through to a level insufficient for igniting any eksplozivno mixtures that may be present outside the enclosure.