1. The explosion-proof category, level, and temperature group of explosion-proof lamps are specified in national standards.

2. According to explosion-proof types, it can be divided into five main types: explosion-proof, increased safety, positive pressure, non-sparking, and dust explosion-proof. It can also be combined or combined with other explosion-proof types or special types.

3. According to the type of electric shock protection, it can be divided into categories I, II, and III. Anti electric shock protection is to prevent the easily accessible parts of explosion-proof lighting fixtures from being electrified, which can cause electric sparks in the human body or in the contact of conductors with different potentials and ignite explosive mixtures.

Class AI - On the basis of basic insulation, connect easily accessible conductive parts that are not charged during normal operation to the protective grounding conductor in the fixed circuit.

Class B II - using double insulation or reinforced insulation as a safety protection measure, without grounding protection.

Class III - Use a safe voltage with an effective value not exceeding 50V, and no voltage value higher than this will be generated.

Class D0- relying solely on basic insulation as a safety protection measure.