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As for how an explosion-proof box can achieve a protection rating of IP65, I have the following two views regarding its protection rating: 1. When used indoors, an explosion-proof box generally has a protection rating of IP54, as the indoor environment is relatively better. So, what do the 5 and 4 in IP54 represent? The analysis is as follows: The 5 indicates dust protection; in other words, it does not completely prevent dust from entering the device, but the amount of dust that enters is not enough to affect the normal operation of the electrical appliance. The 4 at the end denotes splash protection; in other words, the explosion-proof enclosure should be able to withstand splashes coming from any direction without affecting the electrical components inside it. 2. However, when the explosion-proof box is used outdoors, its protection rating must reach IP65; otherwise, it will directly affect the service life of the explosion-proof box. Let’s also analyze what the 6 at the beginning and the 5 at the end of IP65 represent: The 6 at the beginning signifies dust protection, meaning that no dust can get in. The 5 at the back indicates that the explosion-proof box can withstand water spray from any direction, without this having any impact on its functionality. So how does that explosion-proof box achieve an IP65 protection rating? First point: The flameproof surface of the explosion-proof box must be fitted with waterproof grooves; this way, thanks to the rubber gaskets in these grooves, water and dust cannot enter the interior of the explosion-proof box through the gaps in the flameproof surfaces. Secondly, a rain cover is added between the flameproof surfaces of the explosion-proof box, which prevents dust and rain from entering the interior of the explosion-proof box when the rubber gaskets in the waterproof groove age. Finally, the inlet and outlet connections of the explosion-proof box must use waterproof sealing joints; these joints are usually of the clamping type, and rubber gaskets must be placed at the connection points between the joints and the connectors. An explosion-proof box can achieve an IP65 explosion-proof rating only if it meets the standards in all of the above three areas. The protection rating plays a very crucial role in the service life of explosion-proof boxes.