Electrical and electronic devices are prone to damage by environmental factors. Most encountered factors are dust, water and explosive substances. That is why, sensitive electronic components require casings. The National Electrical Manufacturers Association (NEMA) provide guideleness for the casings. In this article we will dicuss NEMA 7 and NEMA 4X standards, their differences and why our products have these standards.
NEMA 7 Enclosures
NEMA 7 enclosures are designed to be used in flammable environments. Electronic components can cause sparks. When sparks meet with flamamble, they pose ignition and explosion risks. Thus, electronic components places in flamamble environments need to be enclosed.
NEMA 7 enclosures are designed specifically to protect against explosion risks. They are used in areas where flamambles are present. NEMA 7 closures achieve protection mainly by being ex-proof. This means, any spark or local ignition is contained within the enclosure. This is achieved through robust construction and gasketed seals.
Durability of the enclosure is key to ensure safety. Even if the enclosure is up to NEMA 7 standards, any damage may compramise safety. Thus, NEMA 7 enclosures are constructed from heavy-duty materials.
NEMA 4X Enclosures
Some workplaces are threatened by water, dust and corrosives rather than explosives. As mentioned earlier, electronics can be sensitive. Water, dust and corrosive can cause significant damage to them. NEMA 4X enclosures are designed for these environments.
NEMA 4X enclosures use seals mostly made out of rubber. When the enclosure is shut, the rubber seal gets squished and expand. Expanded seal makes sure no contaminant can leak in through the panel gaps.
NEMA 4X enclosures are often UV-resistant. They are commonly used in outdoor applications where water and dust is present. That’s why UV resistance is also an option since exposure to sunlight is another threat.
Conclusion
NEMA 7 and NEMA 4X enclosures protect electronic equipment in different environments. NEMA 7 is for hazardous locations where explosion-proof capabilities are essential. While NEMA 4X is for non-hazardous locations with a focus on water and dust resistance. Understanding the distinctions between these two standards is crucial for ensuring the safety and functionality of your equipment in its intended environment.
