The electric shock protection type of most explosion-proof lamps is Class I lamps, and only a few are Class II and Class III lamps. For example: all plastic explosion-proof lamps, explosion-proof flashlights.

First, according to the protection grade of the enclosure, in order to prevent dust, solid foreign matters and water from entering the lamp chamber, touching or accumulating on the live parts to cause risks such as fire jump, short circuit or damage to the electrical insulation, there are a variety of enclosure protection methods to protect the electrical insulation. The characteristic letter "IP" followed by two numbers is used to indicate the enclosure protection grade. The first number indicates the protection against people, solid foreign matters or dust. It is divided into 0-6 levels. Explosion proof lamp is a sealed lamp with a dustproof capacity of at least 4 levels. The second number indicates the water protection capacity, which is divided into 0-8 levels.

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