Until recently, electrical enclosure manufacturers faced a challenge: In order to build enclosures that were UL 50E Type rated, additional testing and evaluation of the enclosure was almost always ...

Several factors come into play when estimating the size of cooling fans needed to keep electronics cool inside enclosures. Here’s a look at a step-by-step process for roughly sizing fans based on the ...

For electric space-heating cable installations such as the type shown in the Photo, Sec. 424.47 requires manufacturers to provide marking labels indicating that the ...