In the American market, explosion-proof equipment follows a certification system different from the EU ATEX standards—namely, the **Class/Division system** defined by the **NEC (National Electrical Code)** in the United States and the **CEC (Canadian Electrical. In the American market, explosion-proof equipment follows a certification system different from the EU ATEX standards—namely, the **Class/Division system** defined by the **NEC (National Electrical Code)** in the United States and the **CEC (Canadian Electrical. ATEX and IECEx solar panels are photovoltaic panels certified for use in areas where explosive atmospheres may be present. These hazardous environments, defined under the ATEX (European) directive and IECEx (International) standards, can occur in locations where flammable substances like gases. Protecting electrical equipment in hazardous locations, like the one pictured below, requires special considerations to make sure that the electronics (and their enclosures) are designed and operate in a way that is ignition & explosion proof. This system. As more homes and businesses are fitted with PV systems, it is important to understand that multiple codes and standards across different disciplines must be applied to ensure a safe installation for all. Whether you are a system installer, property owner, or electrical inspector, finding all of. A Class I Div 2 certified system means that the world's most trusted name in testing, Intertek, has independently certified these systems as safe for use in the highest level of hazardous locations where there is the possible presence of flammable gases, vapors, or liquids.