There are a number of flammability ratings for electrical enclosure. The most common are VDE’s and UL’s standard guidelines.
In Europe, the flammability ratings adhere to VDE’s DIN EN 60670-1, DIN EN 61439-1 and DIN EN 62208 standards.
Materials tested according to these standards are brought into contact with a hot filament for 30 seconds. The test is passed if the enclosure does not burn or glow, or if it self-extinguishes the flames and the glow within 30 seconds after removal of the glow wire.
In the U.S, the most commonly used flammability standard for electrical cabinets and enclosures is UL 94, set by Underwriters Laboratories (UL), which assesses the flammability of plastic materials for parts in devices and applications.
In this case, materials are placed above a flame for 30 seconds in the horizontal burning test (HB), twice for 10 seconds with the vertical burn test (V) and five times for 5 seconds with the 5V test. The materials tested are then classified based on whether they are self-extinguishing or not, the time required to self-extinguish the fire, presence of burning drops or burn holes.
All Spelsberg’s enclosures are tested at our in-house test centre in Schalksmühle, Germany. The laboratory is certified to conduct flammability testing in accordance with both VDE and UL standard guidelines. In this way, we can be sure that our enclosures are manufactured to the highest standards and meet the requirements you need for your desired application.
If you’d like more specific information about flammability ratings on Spelsberg electrical enclosures or have specific flammability requirements for your intended application, please feel free to send me a private message to discuss the solution that best fits your needs.
For an overview on the flammability ratings of materials used in our enclosures, visit:
For more information on UL tests and methods, visit:
For more information on VDE tests and methods, visit: