It describes HA, HK, and LGD series boxes with dimensions ranging from 100-415mm in length, 105-323mm in width, and 75-140mm in height. The XL type low-voltage power distribution cabinet uses domestically designed new components. The enclosure is made of bent steel plates, featuring a compact structure, easy maintenance, and flexible circuit scheme combinations. Besides air circuit breakers and fuses for circuit protection, the. Electrical enclosure sizes are not universal, but most manufacturers follow common size families. As a member of the ABB MNS family, this particular product is widely used in the lower-level power distribution facilities with MNS® low-voltage switchgear in the following. Electrical control panels and distribution boxes are the backbone of modern electrical systems. The body of the boxes shall have sufficient re- enforcement with suitable size of channels keeping a provision for fixin andle conforming to general. Load Center Design Design Features Performance Features Safety Features Load Center Specifications Box Wrapper Specifications Ease of Instollation Features BAHRA MCB as per IEC Standard Features Range Circuit Breakers BAHRA Branch Breaker specification BAHRA (MCCB) Breaker specifications (IEC).