(1) The allowable working position of explosion-proof lamps, some explosion-proof lamps are only allowed to be installed and used in a certain position or a certain angle. This is because of the change of the working position, the heat distribution on the surface of the explosion-proof lamps and the high surface temperature will occur. The main reason for the restriction on the working position of explosion-proof lamps is to control the high surface temperature, so that it does not exceed the temperature group marked by the explosion-proof lamps themselves, resulting in dangerous temperatures. In addition, the change of working position will also have an impact on the life and performance of some light sources, as well as on the insulating materials, electrical components, insulation properties and lifespan of lamps and lanterns. Therefore, explosion-proof lamps with limited installation and use positions must be clearly stated.

(2) In order to reduce the high surface temperature of explosion-proof lamps and reduce the product temperature grouping level, the design and selection of explosion-proof lamps with special specifications of light sources must indicate the name, model, shape and size of the bulb and the manufacturer. If not specified, when users switch to other bulbs of the same power, the high surface temperature of explosion-proof lamps may exceed the ignition temperature of the explosive gas mixture in the use environment, posing an explosion hazard.

(3) Under the unfavorable conditions of normal work, if the insulating material of the power cable or wire is subjected to high temperature in the lamp, it should be marked if it exceeds 80 degrees, so that the corresponding cables and wires can be selected. When there are special requirements for incoming cables or wires, specifications, models and applicable temperatures must be indicated.

(4) Lamps with batteries must state the type, nominal voltage and nominal capacity of the batteries to avoid loss and danger.

(5) E For explosion-proof lamps with concentrating and similar performance, a short distance from the illuminated object should be indicated to prevent the illuminated object from being scorched and burned.