To calculate your load, you will need to know the amperage of each of your breakers. You can usually find this information on the breaker box or by consulting an electrician. In this article, we will discuss how to prepare DB loading schedule, and the branch circuit load calculations related to it including, total connected loads. The distribution board is part of the distribution system. It is the Sum of all the loads connected to the electrical system, usually expressed in watts. It is The electric load at the receiving terminals averaged over a specified demand interval of time, usually 15 min. * and Electric Power Distribution System Design, New York Turan Gonen, : McGraw-Hill, 1986, p. This method is commonly used for residential purposes.