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

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

3. According to the type of anti electric shock protection, it can be divided into Class I, II, and III. Anti electric shock protection is to prevent the parts of the explosion-proof lamp housing that are easily touched from being charged, which can cause electric shock to the human body or spark when conductors with different potentials come into contact, igniting explosive mixtures.

Class A Ⅰ - On the basis of basic insulation, all accessible conductive components that are not charged during normal operation are connected to the protective grounding conductor in a 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.

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

The vast majority of explosion-proof lighting fixtures have an anti electric shock protection type of Class I lighting fixtures, with only a few being Class II or III lighting fixtures. For example: all plastic explosion-proof lamps, explosion-proof flashlights.