It is suitable for circuits with AC frequency of 50HZ and rated working voltage below 500V. Under special requirements, the protection level can reach P55. There are knock-out holes on the top and bottom of the box, and a pre-installed perforated plate can be reserved for multi-tube. AC Low voltage distribution box Overview JXF Series product is a closed structure, being wall-hung mounted or embedded in the wall. AC. For seamless consolidation, distribution, and management of power supply. With a range of materials to choose from and the ability to adjust sizes to your liking, our offerings are designed to meet your unique needs and preferences. To order such indoor box, a letter “R' is specified when ordering; to order the concealed box sized 250 x 200 x 140, the order number is JXF252014R.