Current: The current flowing through the distribution system is given by I = P / (V * PF). Our goal? Make sure you never notice it. Before we dive into calculations, let's get familiar with a few essentials: 1. Your Project's Total Power Demand This isn't just adding up. Design Distribution Box of one House and Calculation of Size of Main ELCB and branch Circuit MCB as following Load Detail. Power Supply is 430V (P-P), 230 (P-N), 50Hz. 6 for Non Continuous Load & 1 for Continuous Load for Each Equipment. Branch Circuit-1: 4 No of 1Phase. The Busbar Size Calculator helps engineers and electricians find the right copper or aluminum busbar dimensions based on current capacity, material type, and environmental conditions. This article explains how the calculator works, the standards it follows (IEC and NEC), and what factors influence. A custom power distribution box provides organized, safe, and specialized power access for unique electrical demands. This project involves combining an enclosure, protective devices, and various receptacles into a single, portable, or semi-permanent unit. The total load connected to the power box must not exceed its rated capacity to prevent overheating and potential. Calculation of total connected load: The total connected load and hence the total current is calculated for deciding the cable size, rating of main switch board and distribution board.