Applicable scope, explosion-proof junction box applicable scope: 1.1 zone, 2 Zone explosive gas environment. Zone 2.20, Zone 21, zone 22. 3. Suitable for Class IIA, IIB, IIC explosive environment 4. Suitable for temperature group T1-T6 environment. The role of explosion-proof junction box: in dangerous areas, the environment prone to explosion as a transit box, sub-line with. Through the sealing of the connection, the damage of the line caused by the explosion of the external environment is prevented, and the internal spark of the line is avoided, to the external environment security risks (such as flammable, explosive places, wiring spark caused by explosion)