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

Firstly, according to the protection level of the shell, there are various shell protection methods to protect the electrical insulation, in order to prevent dust, solid foreign objects, and water from entering the lamp chamber, touching or accumulating on live parts, causing risks such as fire, short circuit, or damage to electrical insulation. Use the characteristic letter "IP" followed by two numbers to indicate the degree of protection provided by the enclosure. The first number represents the protective ability against humans, solid foreign objects, or dust. Divided into 0-6 levels. Explosion-proof lamps are sealed lamps with a dustproof capacity of at least level 4 or above. The second digit represents the water protection ability and is divided into 0-8 levels.

Secondly, according to the material classification of the supporting surface of the lamp design: Indoor explosion-proof lamps may be installed on many surfaces that belong to ordinary combustible materials, such as wooden walls and ceilings, and they do not allow the temperature of the installation surface of explosion-proof lamps to exceed the safety value. According to whether explosion-proof lamps can be directly installed on the surface of ordinary combustible materials, they can be divided into two categories.