Rated Voltage – Commonly 380 V / 400 V / 415 V (3-phase), or match your system standard. Rated Current – Size according to maximum load demand, plus growth margin. Choose the right low voltage distribution box by matching capacity, safety, and environment to your needs for reliable and efficient electrical protection. You can find here a step-by-step guide to help you through the process. Determine the voltage level (e., 230V single-phase or 400V three-phase). Distribution Architecture Options Radial systems provide simple, cost-effective power distribution. Single feed paths limit redundancy options. Automatic switching maintains service during outages.