In this video, you will learn: The essential components of a distribution board, including MCBs (Miniature Circuit Breakers), RCDs (Residual Current Devices), and busbars. How to safely connect incoming and outgoing cables to the DB box. The importance of earthing and. 10 [10 m (32. Wiring diagram shows both PNP and NPN wiring. Actual units. With the new distribution box, centrally routed cables can be distributed 360° in all desired directions. Cables with and without connectors can be routed, sealed with IP54 (acc. Power distribution terminal blocks are differentiated by the number of poles, connections per pole, stud size, and voltage and. le pole Isolator (Switch Disconnector), conforming to relevant latest I. The supplier shall submit Type Test Repor of the Isolator for approval of Employer before commencement of supply.