Three builders turn a list of rooms or boards into sized circuits and a one-line overview.
House starts from rooms and points. List each room's socket outlets, lighting points and fixed loads. AmpSize groups them into circuits and sizes each cable. Its maximum demand always reads Table C1, single domestic.
Site starts from a transformer or a temporary supply. Next come the boards and the feeders that supply them. Then each board's areas and loads. Its maximum demand reads Table C2.
Plant area starts from a supply and its boards. Next come the motors, heaters and instruments in each area, each motor given a sized circuit. It links controllers, sensors and drives to the right cable, and reads Table C2 too.
Every builder ends on an Overview step. It shows the maximum demand and a one-line diagram. Some add exports too, such as the asset register or the cable list.
Starting a builder needs a sign-in, and the project it creates counts against the free plan's one-project limit. A free account at that limit sees a link to the pricing page instead of the Start button. Pro projects are unlimited.