It serves as a power or lighting distribution unit in three-phase AC distribution systems below 500V, including three-wire (3P), four-wire (3P+N), and five-wire (3P+N+PE) configurations. Designed for indoor wall-mounted installation, it features front-side operation and maintenance access. XJM. Cabinet front door installed ammeter,voltmeter and the signal lamp, button, selector switch and other components. The main distribution box adopts self-design of new components, compact structure, beautiful appearance, easy maintenance, a variety of wiring options for users to choose, it is an. Our engineering team can design the perfect XL-21 configuration for your specific application requirements. The XL-21 series combines robust engineering with intelligent design to deliver unmatched reliability and operational excellence Constructed from high-quality cold-rolled steel with an. The XL-21 Power Distribution Box is used for power distribution, conversion, transmission, control, and on-site operations in low-voltage distribution systems. The XL-21 Power. Standard Type (P Type): This version has a cabinet height of 1700mm or 1800mm and is designed for independent installation. It can be equipped with entry and exit holes at the top as required.